a) The nosepiece style (GM, Ford, Mopar) must match the body style of the car and be the same as the motor used.
b) All cars must have a minimum of half inch (1/2”) and a maximum of one inch (1”) radius at the top of fenders, doors and quarter panels. A sharp edge will not be permitted.
c) Floor boards and firewall must fully cover the driver’s area and be constructed to provide maximum safety.
d) Legible race numbers, at least eighteen inches (18”) high are required on each side of the car and on the roof.
e) Race number(s) must also be displayed on the front nose and rear fuel cell and be a minimum of six inches (6”) in height.
f) No fins or lips of any kind are permitted anywhere along the entire length of the car.
g) The body line must be a smooth even line from front to rear.
h) No wedge shape cars are permitted.
j) No “belly pans” or any type of enclosure on the bottom of the car is permitted. A robust skid plate to protect the oil pan is permitted.
k) No wings or tunnels of any kind are permitted underneath the body or chassis of the car.
l) A maximum of one (1) stone deflector, for rear mounted oil pumps, oil filters, and for the main oil tank will be permitted. The deflector may be made of steel, aluminum, or heavy gauge wire. The cover may only be mounted near the unit it is designed to protect with a maximum size of eighteen inches square (18” x18”) and mounted only from the upper right frame rail to the lower right frame rail.
m) No panels of any kind under the rear deck running from the front to the rear of the car are permitted
n) Non-approved bodies may at the discretion on the tech inspector, be assessed a fifty pound weight penalty.
o) Any style air cleaner scoop used must be positioned in front of or around the air cleaner and can not exceed one inch (1”) in height above any part of the air cleaner. The scoop may not have fins or raised edges designed to direct air flow.
p) No cockpit adjustable components with the exception of brake bias are permitted. No adjusters for adjustable shocks, hydraulic or pneumatic weight jacks, trackers, ignition boxes or similar adjustable components of any kind are permitted inside the cockpit of the car or within reach of the seated driver. Taping over of the adjuster(s) is not permitted. The offending component must be removed from the cockpit.
1.2 Stock Nosepiece
a) Only DIRT MotorSport approved stock nosepieces may be used. A list of approved manufactures and part numbers is available from Dirt MotorSports.
b) Nosepieces must be made of molded type material.
c) Two piece noses must be fastened together in the center. Spacers added to gain width are not permitted.
d) The nosepiece must be mounted so as not to alter its original shape.
e) The nosepiece can extend a maximum of fifty two inches (52”) from the center of the front hub to the farthest point extending forward.
f) The nosepiece must have a headlight decal package affixed. A one race grace period, running contrasting color tape in the shape of a headlight will be permitted.
a) The roof length size must be a minimum of forty four inches (44”) to a maximum of fifty four inches (54”). b) The roof width size must be a minimum of forty eight inches (48”) to a maximum of fifty two inches (52”).
c) The roof must be stock appearing and be mounted level.
d) The roof height must be between forty five inches (45”) and forty eight inches (48”) from the ground.
e) The roof must be mounted parallel to the body and near the center of the car as viewed from the front.
f) A maximum one and one half inch (1.5”) roll, turned downward, is permitted along the front edge of the roof. A maximum one inch (1”) roll, turned downward, is permitted along the rear edge of the roof. (These rolls are permitted to help strengthen the roof.) No turn up at the rear of the roof will be permitted.
g) No flat or odd shaped roofs are permitted. No bellied or hollow roofs.
h) Any sun/antiglare shields may not exceed a 4” drop from the top roof line, and must hinge for easy exiting.
1.4 Roof Supports and Window Side Panels
a) All roof side panels must extend to the edge of the body.
b) Roof side panel window size must match the dimensions in the drawing and be a minimum of ten by fifteen inches (10’’ x 15’’).
c) The window area may be covered with clear Lexan or equivalent, be cut out, or be represented by a decal. Both roof support openings must be covered or both must be left open.
d) Left and right side window panels must match.
e) A maximum bow of one and one half (1.5’’) outward on the window side panels as viewed from behind will be permitted.
f) Front roof supports up to two inches wide must extend forward to the rear of the hood.
1.5 Front Fenders, Fender Flares and Hood
a) The hood and front fenders must be level and flat from the left to the right side of the car.
b) The line from front to rear fender heights must slope up.
c) No part of the fender or the hood can be outside of the body line.
d) The front fender can be a maximum of thirty seven inches (37”) in height. Height is measured vertically from the ground to the top of the fender behind the front tires.
e) Front fender flares must be made of plastic and cannot alter the original shape of the nosepiece.
f) The front fender flares cannot extend beyond the front tires more than one inch (1”) per side to a maximum of ninety inches (90’’) in width with wheels pointed straight.
g) The front fenders flares may not be higher than the front fender by more than two inches (2”)
h) Front fender flares must have collapsible supports.
a) The door to door measurement cannot exceed seventy six inches 76”) in width at the top of the doors
b) The door to door measurement cannot exceed eighty two inches (82”) in width at the bottom in the center of the car.
c) Doors cannot exceed thirty seven inches (37”) in height measured from the ground.
d) At no point can the door sides break inwards from the top 76” and bottom 82” measurements. No hollow or bellied doors permitted.
e) The minimum ground clearance permitted is three inches (3”).
1.7 Quarter Panels
a) The maximum distance permitted from the center of the rear hub to the top corner of the quarter panel is fifty two inches (52”).
b) The quarter panels cannot exceed seventy six inches (76”) in width at any point behind the center of the rear hub as measured at the top.
c) Rear decks must taper from seventy six inches (76’’), as measured at the top, over the rear hubs, uniformly back to seventy two inches (72’’) at the spoiler, either, equally on both sides or on the left side only.
d) The quarter panels cannot exceed eighty inches (86”) in width in the center (19” height off ground) or at the bottom.
e) At no point can quarter panel sides break inwards towards the center of the car. No hollow or bellied quarter panes permitted.
f) The maximum distance from the center of the rear hub to the end of the quarter panel is forty eight inches (48”).
g) The maximum height permitted from the ground to the top of the deck is thirty eight inches (38”).
h) Tire clearance from the body should be a minimum of two inches (2”).
i) No skirting is permitted to extend behind the quarter panel.
1.8 Spoiler and Spoiler Supports
a) The rear spoiler must be manufactured of adequate strength material such as Lexan or Aluminum.
b) The maximum overall length of the material used on the rear spoiler is eight inches (8”). The maximum width of the rear spoiler and supports is seventy two inches (72”).
c) The rear spoiler is not permitted to be suspended above the deck to create a “wing effect”.
d) The rear spoiler must begin where the quarter panels end.
e) No more than three spoiler supports are permitted. The front edge of the spoiler supports must be in line.
f) The outer spoiler supports cannot be mounted wider than the top of the quarter panel, and must be centered on the deck.
g) Spoilers will be measured according to the total length of and width of the material, in any shape or form. If an aluminum angle is used to brace the upper edge of the spoiler, it may not add to the spoiler height or length in any way.
a) No area of the interior of the cockpit can be less than eleven inches (11”) below the roof and the roll cage for safety and easy exiting of car from either side measured straight up and down.
b) Side windows must have fifteen inches (15”) minimum opening, measured at an angle to the door.
c) No support bars are permitted to block the right window exit from the cockpit.
d) A rock guard (lexan screen) can taper back from the steering wheel to a height of one inch (1’’) in line with the driver’s chest providing the eleven inch (11”) minimum clearance is met at any point from the roll cage to the body or rock guard. Easy exit on right side of the car is imperative.
e) Dropped interiors may begin no further forward than the rear engine plate with a maximum of four inches (4”), and cannot drop below four inches (4”) of the rear of the hood. The start of the dropped interior may not be open, as this forms part of the fire wall. The entire width must be closed off in sheet metal.
f) The interior must gradually taper up to the quarter panel height and be level for twenty inches (20”) from the rear of the quarter panel and deck.
1.10 Driver Compartment
a) A full metal firewall must encompass the driver’s compartment from front to rear, on both sides and the floorboards. Aluminum or sheet metal is required.
b) The driver’s seat must be of a proper high back aluminum racing seat design, located on the left side of the car and securely attached to the frame. This seat must incorporate a padded headrest. A right side padded head rest must be incorporated in the absence of a head net or padded head support attached to the roll cage..
c) All cars must have a quick-release type steering wheel.
d) All cars must have a working starter, operated from inside the car.
e) No mirrors are permitted.
f) No radios are permitted in the car or on anyone connected with car.
g) The edges around the driver’s cockpit must be suitably protected with trim or beading. Care must be taken not to have any sharp, jagged or rough fasteners, brackets or anything else that could snag the driver’s suit when the driver exits the car.
h) A substantial rock guard steel screen must be mounted in front of the driver to protect him from flying debris, and rocks.
a) The wheel base width must be between a minimum of one hundred and three inches (103”) and maximum of one hundred and five inches (105”).
b) All frames must be of steel construction and must be a minimum of two inches by two inches square (2” x 2”), or rectangular, with a minimum material thickness of .083 inches.
c) If a round tube frame is used, the tubing must have a minimum of one and three quarter inch (1.75”) outside diameter, with a minimum material thickness of .083 inches. These frames must use 4130 Chrome Moly Steel or DOM for construction.
d) If the rear bumper is stubbed, it may only extend a maximum of eight inches (8”) beyond the frame. Any stubbed rear bumper that extends in excess of eight inches (8”) beyond the frame must be rounded and directed eight inches towards the front of car.
e) No external rub rails are permitted.
f) It is recommended that all cars be equipped with a tow hook or strap.
g) All battery supports must be braced in at least two axes, two horizontal and one vertical.
h) All frames built from 2006 on, are required to have the builder’s unique serial number plate prominently attached by welding on the left side of the roll cage upright. The letters and numbers shall not exceed 8 in number, and be half inch (0.5’’) in height.
1.12 Roll Cage
a) Cars must have a suitable steel roll cage in the driver’s compartment
b) Should the drivers seat not have a suitable right side padded headrest, or right side head net, one must be attached onto the roll cage.
c) Side roll bars are mandatory and must extend into the door panels.
d) A minimum of three bars must be used on the left side of the car. Each bar must be a minimum of one and one half inch (1 ½”) in diameter with a minimum thickness of .065”.
e) The roll cage must be welded to the frame.
f) The roll cage must be above the driver’s helmet.
g) For all new frames built in 2006 on, an extra vertical side brace bar of one and one half inch (1.5’’) dia x .065” is required on left side in line with the steering wheel.
a) No direct drives are permitted. The transmission must be bolted to the engine, and must have forward and reverse gears and must be able to shift to forward or reverse with engine running. All cars must be self starting.
1.14 Drive Shaft
a) The drive shaft must be a minimum of two inches (2”) in diameter. All drive shafts must be painted white.
b) Only one drive shaft is permitted.
c) The driveshaft must be protected with a minimum of one secure driveshaft hoop or sling, however, DIRT MotorSports recommends using two hoops.
1.15 Rear End
a) Any type of rear end differential is permitted.
b) No “live axle” rear ends are permitted.
c) No independent rear suspension is permitted.
d) Only floater “wide five” hub assemblies are permitted.
a) All cars must be equipped with a four wheel disc braking system.
a) Shocks must be constructed of aluminum or steel. Remote reservoirs are permitted.
a) Coil springs must be steel. Leaf springs may be composite or steel.
a) Only steel or aluminum wheels are permitted.
b) The wheels must be mounted with lug nuts. No “knock-off” mounting devices are permitted.
c) The maximum wheel width permitted is fourteen inches (14”).
d) Wheel spacers are permitted provided they do not cause the front track width to exceed the ninety inches maximum or rear track to exceed the eighty-eight inches maximum measured outside to outside of the tire.
Only Hoosier LM 11×88’’, 90’’ or 92’’ or M40 are permitted
Max tire hoop width is sixteen and three quarters inches (16.75”).
No defacing or refacing of tire lettering permitted.
No tire softening permitted.
a) Only V8 engines will be permitted with no limit on cubic inch displacement.
b) Engines must be based on a factory design and must be naturally aspirated. Aluminum or steel blocks are permitted.
c) Magnetos are permitted. However, the engine must have an operating self starter.
d) The engine is permitted to be set back a maximum of twenty five and one half inch (25 1/2”) from center of the ball joint to the front of the motor plate/engine bell housing flange.
e) The carburetor is limited to 1 four barrel unit.
f) All engines are limited to one spark plug and two valves per cylinder.
1.22 Traction Control Devices
a) All traction control devices utilizing wheel sensors or any means of measuring ground speed to control wheel spin are strictly prohibited.
b) Adjustable ping control devices, dial a chip controls, timing controls, or automated throttle controls are NOT permitted in the cockpit or any other position accessible to the driver.
c) Any remote controlled components inside or outside the cockpit of any competitor’s race car are NOT permitted.
d) No data acquisition systems are permitted.
e) Any competitor found with any of the above will be fined could be disqualified and suspended for up to a year.
1.23 Fuel System
a) All cars must have fuel cells to FT3 specifications – 35 gallon maximum. The fuel cell must be in a completely enclosed, in minimum 20-gauge steel or 0.060” aluminum, container. The entire container must be visible. The driver must be prepared to drain fuel upon request for measurement.
b) The fuel pick up must be on the top or right side of the fuel cell, be constructed of steel and must have a check valve in case of roll over.
c) Only racing gasoline or alcohol is permitted. No nitrous oxide, nitro-methane, or propylene oxide is permitted. Fuel may be checked at any time.
d) The FT3 fuel cell must be securely mounted behind the rear axle between the rear tires, a minimum of four inches ahead of the rear bumper, no lower than the quick change housing. It must be mounted with a minimum of two .125 inch thick steel straps two inches wide around the entire cell. Cells mounted in a square tubing fame are permitted. All cells must be securely mounted to the frame. The bolts used to mount the fuel cell must be a minimum of 7/16”.
e) No fuel injection system or electrical fuel pumps or any type of pressurized fuel system is permitted. Only mechanical or belt driven fuel pumps are permitted.
a) The exhaust is not permitted to be directed towards the ground. (The exhaust must be parallel to the ground so as to disturb as little dust as possible.)
b) All headers must end with a collector.
a) Any attached weights must be securely attached to frame below the decking, painted white and have the car number clearly displayed on them. Weights of up to 50 pounds must be secured by two half inch Grade 5 bolts on two weight clamps. Weights secured by one bolt and/or held on by a means other than accepted by the Tech Inspector will not be permitted. No all thread will be permitted. Due to the high risk factor involved, any car that loses lead weight during an event may be fined or face disqualification. Clamp around weights are permitted.
b) No weights may be attached to rear bumper.
c) No lead pellets or liquid weights are permitted.
d) No driver-operated weight adjustment devices are permitted.
e) The total weight of the car with the driver must not be less than 2300 track scale pounds.
a) No car will qualify without Tech Inspector approval. All cars must be available for inspection prior to the advertised time of the driver’s meeting. Following the drivers meeting, covers of any type are prohibited until the feature is completed. All race cars are subject to inspection by officials at any time.
2. Safety Equipment
2.1 Seat Belts
a) The use of at least a DIRT approved five point seat belt system including a crotch belt is required. The system is to be mounted to the frame and not to the floor pan. The mounts must be run at the same direction, as the belts are intended to secure the driver. The belt webbing must be protected from any sharp cutouts in the sheet metal or any other sharp edges. The date on the belt must not exceed 4 years.
b) Seat belt webbing that comes into contact with any sharp or unradiused metal edge must be protected from that edge by means of push on grip vinyl trim. The areas of concern are the webbing slots in the metal racing seats. All the seat manufacturers either roll the edge or supply the seat with trim protecting the webbing from abrasion or cutting under impact conditions. Webbing entry slots into the seat with an existing metal roll of 1/8 inch smooth radius will not require vinyl trim.
c) The areas where the webbing slot has been enlarged by filing or cutting are of particular concern. In most instances the edges have been left sharp, increasing the incidence of belt failure. As racing seat belts are subjected to severe conditions, it is encouraged that worn/frayed belts are replaced immediately and undamaged belts are replaced every 24 months. The date sewn into the webbing should be used as a guide. Where the seat belt date is known to be “new old stock”, it is acceptable practice to extend the replacement date on that set of belts to 36 months from date of manufacture. Belts older than 48 months will not be permitted for the 2006 season. Damaged belts will also not be permitted.
a) There must be no sharp or protruding edges in or around the cockpit, which would impede the driver’s rapid exit from the car.
b) A headrest (behind the head) with padding is required.
c) A right headnet in the absence of a padded right headrest is required. Headnets must be equipped with quick release mechanisms.
d) There must be a marked electrical kill switch in reach of driver.
e) There must be a marked fuel shut off valve in reach of driver.
f) All drivers must wear a clean one-piece DIRT approved driver’s suit, quilted or with underwear, head socks, gloves, foot socks and shoes to DIRT approved specifications.
g) An undamaged Snell SA95 or newer spec full face helmet is mandatory for all events including track packing.
h) All crews must carry an operable fire extinguisher of 20 pounds marked with the car number in 2 inch numbers/letters in the rear of their transporter, capable of extinguishing gas and oil fires.
i) Neck collars or similar restraints are suggested.
j) Arm restraints are suggested.
k) Flame retardant seat, roll bar, knee and steering pads or padding are required.
l) Driver’s suits, gloves, shoes and helmets must be presented at Tech inspection.
2.3 GENERAL RULES AND PROCEDURES
a) The rules and/or regulations set forth herein do not express or imply warranty of safety from publication of or compliance with these rules and/or regulations; they are intended as a guide for the conduct of the sport and are in no way a guarantee against injury.
b) U.M.P. may at anytime make amendments to the rules set forth. Rule amendments will be posted online via the U.M.P. web site and noted in the official U.M.P. newsletter.
c) U.M.P. rules shall apply at all U.M.P. sanctioned events. Tracks that neglect to enforce U.M.P. rules may lose their U.M.P. sanctioning and participation in State and National point’s competitions as well as any special events.
d) U.M.P. officials shall have full authority over U.M.P. sanctioned events. At the discretion of U.M.P. officials, any competitor may be penalized for rules violation, hazardous actions or assaults/threats against any official.
e) No car will qualify without inspector approval. All U.M.P. racecars are subject to be inspected by U.M.P. officials at any time.
f) The use of pit boards is prohibited.
g) All U.M.P. racetracks will phone, e-mail or fax results to U.M.P. headquarters before noon each Monday. Any track that repeatedly fails to submit results may risk losing their U.M.P. sanction and participation in National and State points competitions.
a) No derogatory or distasteful statements on any racecar or hauler are permitted at any U.M.P. racetrack. U.M.P. officials have discretion and the final decision on all lettering on all racecars and haulers. Failure to remove offensive lettering will mean disqualification from all U.M.P. events and a fine of up to $500.00.
b) Any participant who fights in pits, on track or on race premises will be suspended from all U.M.P. events for 1 (one) week and fined $100.00 and is on 1 (one) year probation for the first infraction. A second fight will result in the driver being suspended for 2 (two) weeks and fined $200.00. Any driver in a third fight will be suspended from all U.M.P. races for 1 (one) year and fined $1,000.00. All drivers are responsible for their crew members.
c) No driver or pit crew member shall subject any U.M.P. promoter or official to threats, abusive or improper language at any time. Any driver or pit crew member who assaults or threatens any U.M.P. promoter or official may be fined up to $1,000.00 and suspended indefinitely from all U.M.P. events until fine is paid. Reinstatement and fines are at the discretion of U.M.P. management and non-contestable.
*drawings can be found here www.umpracing.com/
1. Top View
2. Side View
3. Spoiler Support
4. Rear Roof Support
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The United States Modified Touring Series shall hereafter be simply referred to as USMTS throughout the rules description. USMTS Officials include all personnel employed as an Official by participating track.
1. General rules
1.1 USMTS rules shall apply at all USMTS events. All participants (including drivers, crewmembers, owners, sponsors, etc.) are subject to the rules of USMTS and are expected to know the rules and any claimed ignorance of the rules will not be accepted or tolerated as an excuse.
1.2 USMTS Officials shall have full authority over USMTS events. At the discretion of the USMTS Officials in charge, any competitor may be disqualified for the rule violations, hazardous equipment or hazardous actions.
1.3 All USMTS racecars are subject to inspection by a USMTS Official at any time. Any driver that refuses to allow a pre-race or post-race inspection to be conducted, or terminates an inspection in progress, shall be fined $1,000 and suspended for five events, lose all season points and forfeit all money and awards won at that event.
1.4 Approval of any USMTS racecar by USMTS Official shall mean that the vehicle is approved for participation in a competitive event and shall not be construed in any way to mean that the inspected vehicle is guaranteed mechanically sound or safe. Be it further declared that the USMTS Official shall not be liable, nor shall the USMTS, for any mechanical failure nor for any losses, injuries or death resulting from same.
1.5 Drivers, owners and crewmembers will conduct themselves as professionals. Any unsportsmanlike conduct by drivers, owners and/or pit crewmembers shall be grounds for disqualification and/or punitive action by the USMTS and will be strictly enforced. Drivers are responsible for the conduct and actions of their owners and pit crewmembers.
1.6 Absolutely no alcoholic beverages will be consumed by drivers or their pit crews prior to or during a USMTS event. The duration of the USMTS event includes all support class races run as a part of the program. Use, sale or distribution of illegal drugs at any time shall be cause for immediate, indefinite suspension.
1.7 All drivers must be at least 16 years of age (proof of age required). Drivers under 18 years of age will be required to have a signed and notarized Parental Consent form by Parent or Legal Guardian and said document must be in the hands of a USMTS Official before participation of said individual will be allowed. (Note: The USMTS may require Participant to undergo physical examination before said individual is allowed to compete in any USMTS event.)
1.8 Drivers must support any and all official USMTS sponsors by properly displaying all USMTS decals and sponsor decals to participate in any USMTS point funds. These decals must be displayed on both sides of the racecar and must be of the original size given to the driver. Failure to display the required decals, as set forth above, will result in a loss of 10% of all cash won at the event in which the decals were not displayed and loss of any and all contingency awards for said event. Also, if any driver notifies a USMTS Official before the finish of the final B-feature that another driver does not have the proper sponsor decals on his car and that driver does not have the decals on for the A-feature, then the 10% fine will be awarded to the driver that reported the infraction. The first driver to report the infraction will be the one rewarded and all reports will be kept confidential as to who reported the infraction. The 10% award will be mailed after the event.
1.9 Drivers in the top 10 in regional points will be paid point fund money at year-end based on the percentage of the events that they competed in, times the amount of money scheduled to be paid for their final position in the point standings. In national points, drivers will be paid by the percentage of races attended for year-end point money.
1.10 A “rookie” is any driver that has not finished in the top 10 in points in any USMS/USMTS season, or any driver that has not finished in the top 10 in national points. New rookie rule for 2006: Any driver not competing in ten events in a given year with the USMTS.
1.11 No equipment or racecar will be considered as having been approved by reason of having passed through inspection unobserved.
1.12 USMTS reserves the right to add to, delete supersede or modify any rules, exhibits or drawings that the USMTS deems necessary for the betterment and/or safety of racing. All amendments are effective on the date of publication by the USMTS regardless of when a person subject to the rules receives actual notice of the amendment.
1.13 Every driver must inspect the racing surface and the track area to learn of any defects, obstructions, or anything, which, in the driver’s opinion is unsafe and the driver shall report that condition in writing to a USMTS Official. Any driver entering any racing event is considered to have inspected the track and determined that all conditions are satisfactory. If the driver does not feel that the conditions are satisfactory, then the driver should not race. The driver further acknowledges that he is aware that auto racing involves risk and that by competing in an event, the driver assumes these risks with full awareness and responsibility.
1.14 Any person who defies or violates the intent or spirit of the USMTS rules shall be considered to have engaged in unsportsmanlike conduct and shall be dealt with by the USMTS.
1.15 All illegal parts discovered through inspection shall be confiscated by USMTS officials and forfeited by the participant to surrender illegal parts for confiscation shall result in a separate penalty, in addition to any other penalties for illegal parts under these rules, of two times the estimated value of the illegal parts (as determined by the USMTS).
1.16 All drivers are responsible for registering their cars each day of an event and having a number drawn for their starting position in heat races.
1.17 USMTS or the track promoter reserves the right to refuse to accept the entry of any car or participant. Furthermore, USMTS or the track promoter reserves the right to revoke or cancel any entry, or any participant’s claimed right to be on the track’s premises, if it is felt or determined that a participant’s presence or conduct is not in the best interest of the sport of auto racing, the other competitors, the spectators, the track management and/or the employees of USMTS.
2. Car rules
2.1 Car Bodies
2.1a 1970 or newer American compact passenger car only (no panel vans or station wagons).
2.1b An aluminum half-windshield may be used on driver’s side of the front window opening only.
2.1c Stock appearing front window support units must be used (painted roll bars are not acceptable substitutes). Front window may have a support of no more than six (6) inches at bottom, going straight up to top for non-clear materials. Support may be up to ten (10) inches at bottom, going straight up to top, only if it is a clear Lexan material.
2.1d A minimum window opening of twelve (12) inches must be maintained on both side window openings.
2.1e Floor and firewall must be complete in the driver’s compartment. No interior sheet metal can be higher than or enclose a standard window opening. Sheet metal in the driver’s compartment must be horizontal from the top of the driver shaft tunnel to the right side door bars or angle from the top of the drive shaft tunnel upwards to the top of the right side door bars. Driver must be able to exit car from both sides.
2.1f All USMTS cars should be numbered with large legible numbers on both sides, on top and on the nose and real panels. Numbers on sides of car should be in contrasting color from the body and be at least four (4) inches thick and at least eighteen (18) inches high. Top numbers should be at least four (4) inches thick and twenty-four (24) inches high.
2.1g No streamlining at top of windshield. Bodies must have standard appearing windshield opening and corner post must follow standard configuration.
2.1h Original roofline of vehicle must be maintained with a maximum of five- (5) inches slope from rear to front. No more than one-half (1/2) inch stiffener allowed at the rear of the roof and must turn down perpendicular to the ground. O.E.M. Gremlin roofs are not legal.
2.1I Sail panels must be of matching design. May not have two different styles of sail panels.
2.1j No belly pans. A belly pan will be defined as any object or material that alters the airflow under the car.
2.1k No panel in front of right door next to engine compartment.
2.1l Side panels on engines are allowed for decal use purposes only, may not extend further back than the back of the block or will have to be removed and must be easily removable for inspection of car at any time.
2.1m No car will be allowed to compete with excessive body damage (excessive body damage to be determined by USMTS Officials).
2.1n Spoiler of 5 inches of total material will be allowed.
2.1o Rear view mirror will not be allowed.
2.1p The rear deck lid or trunk area must be covered. Rear of bodies to be solid panel at least eight (8) inches high, securely fastened and include car number.
2.1q Bumpers must be used both front and rear and must contain no sharp edges. Any inappropriate bumper will be disallowed. Front bumper should be mounted frame-end to frame-end with the bottom loop parallel to ground. Should be made of minimum 1-1/4 inch tubing and must be able to support car if lifted by a tow vehicle.
2.1r Rear bumpers, side rail bars, and bodies must not extend beyond the width of the rear tires.
2.1s Rear bumpers may be constructed of tubing or flat stock, and must protect fuel cell. Center of bumpers (front and rear) must be from sixteen (16) to twenty (20) inches from ground. Rear bumpers may be no more than two (2) inches wider than body on each side and may not be open-ended – they must wrap around and be connected to side rail bars. Rear bumper should be similar in nature to the diagram shown.
2.1t Body should extend no further forward than the back of the block.
2.1u The USMTS reserves the right, in the public image of the sport, to assign, to approve or disapprove any advertising, sponsorship or similar agreement in connection with any event. All cars must be neat appearing and are subject to approval of USMTS Officials to compete. All USMTS competitors agree to comply with the USMTS Officials decisions in this regard.
2.1v Aluminum roofs are allowed in any USMTS event.
2.2 Roll cages
2.2a Round steel tubing, seamless roll-over bars are required for the basic roll cage, and must be acceptable to USMTS Officials. Acceptable tubing is as follows: 1- 3/4 inches x .090 inch or 1-1/2 inches x .095 inch for mild steel and DOM tubing. 1-3/4 inches chrome-moly tubing. Aluminum and/or other soft metals not permitted. Roll bar connections must be welded.
2.2b All roll bars within the drivers reach must be padded with padding acceptable to USMTS Officials. Fire retardant padding is recommended.
2.2c Roll bar installation and workmanship must be acceptable to USMTS Officials.
2.2d Must be frame-mounted in at least six (6) places.
2.2e Must consist of a configuration of front and rear hoops connected by tubing on the sides or side hoops.
2.2f Driver’s head must not protrude above cage with helmet on and strapped in driver’s seat.
2.2g Must have a protective screen or bars in front window opening in front of driver’s face.
2.22h Protection of feet mandatory – bar across back of engine with vertical bars and rub rails or similar protection.
2.2I No brace bars forward of roll cage may be higher than the stock hood height x .083 inch for
2.2j A minimum of three (3) driver side door bars must be parallel to ground and located perpendicular to the driver so as to provide maximum protection for driver, but without causing undue difficulty in getting in or out of the vehicle. The side bars must be welded to the front and the rear of the roll cage members. Door bars less than .090 thickness, should have four (4) bars at least 11/2” in diameter at a minimum of .083 thickness and be gusseted in place. The door bars must have six (6) vertical studs per side of 1-3/4” x .083 minimum seamless round tubing equally spaced.
2.3a Must be securely mounted and shielded. One 12-volt battery only.
2.4a All wheels must be fifteen (15) inches in diameter and eight (8) inches in width. No stickers required.
2.4b Wheels must be reinforced steel only.
2.4c A bead lock or locking device may be used on the right rear wheel only. The bead lock may be mounted on the outside of the wheel as long as it does not add over ¾ inch to the wheel width. Steel or Aluminum allowed.
2.4d No homemade mudcaps / wheelcovers allowed.
2.4e No wide five wheel adaptors allowed.
2.4f Steel or aluminum spacer between hub and wheel allowed, so long as overall width of car does not exceed the seventy-eight (78) inch limit.
2.4g Aluminum or steel lug nuts legal.
2.5a American Racer G60 IMCA Stamp or non-stamped tire legal. All non-stamped tires must be Asphalt (no Dirt).
2.5b No Softening. Grooving and siping is tracks discretion.
2.6a Any factory production complete full 1960 or newer parallel American passenger car frames only. Frames may be cut in rear only at a point not further than thirty-six (36) inches from center of rear end housing.
2.6b Frames may only be altered for the installation of springs and shocks. All frame components must be made of steel and be welded.
2.6c Frames may not be widened or narrowed and must be able to support roll cage on both sides. Must be full and complete on both sides. Front cross member may be notched for radiator clearance only. Minimum frame and body height from ground is four (4) inches (exception is front cross member).
2.6d No Jeep, Bronco (etc.) or 4-wheel drive frames allowed. No sports car frames allowed. No front wheel drive allowed.
2.6e Rear of frame may be altered to accept leaf or coil springs.
2.6f No hydraulic, ratchet or electric weight jacks anywhere on car. No aluminum jack bolts allowed.
2.6g Minimum wheelbase of 108 inches, both sides, no tolerance.
2.6h No tubular front clips allowed.
2.6I Maximum overall width of car (front or rear) shall not exceed seventy-eight (78) inches from outside of tread to outside of tread no tolerance.
2.6j No air bags allowed.
2.7a Must be operating on all four wheels and must lock up all four wheels during inspection. Must have caliper and rotor on all four wheels.
2.7b No electronic brake actuators will be permitted.
2.7c Calipers cannot be lightened and must be O.E.M. Steel or aluminum calipers legal.
2.7d Rotors cannot be lightened or drilled. Rotors may be re-drilled for different bolt pattern or larger studs. Steel rotors only.
2.7e Brake bias allowed. Front to rear only.
2.7f No Brake Shut-offs.
2.7g Brake lines must be visible.
2.8 Fuel cell
2.8a Commercially manufactured fuel cells are required and must be mounted by at least two steel straps, two inches wide around cell.
2.8b Fuel cells must be enclosed in a steel container and must be protected in rear of axle by roll cage tubing mounted securely.
2.8c No part of fuel cell should be lower than protective tubing. Protective tubing should be no wider than six (6) inches on both sides of fuel cell.
2.8d Fuel cells vents must have check valves. Fuel cells limited to thirty-two (32) gallon maximum capacity.
2.9 Fuel/Fuel pump
2.9a Fuel shall be automotive gasoline or alcohol only – No additives of any kind.
2.9b The fuel shall not be blended with ethers or other oxygenates and it shall not be blended with aniline or its derivatives, nitro compounds or other nitro containing compounds.
2.9c No electric fuel pumps allowed.
2.10 Exhaust System/Mufflers
2.10a Must be mounted in such a way as to direct spent gases away from cockpit of vehicle and away from area of possible fuel spillage.
2.10b Use of mufflers is recommended. Mufflers may be required at some tracks – please check with your local track.
2.11a Loose objects and/or weights must not be used in driver’s compartment or outside of body or hood area. Any weights added to other areas of vehicle must be securely mounted and should be painted white and have the car number on it and attached with at least two (2)1/2 inch bolts. No weights may be attached to rear bumper.
2.12a No computers allowed on car, including, but not limited to, electronic traction devices. Any driver caught with traction control is subject to a $5,000 fine and a lifetime suspension from all USMTS point events.
2.13a One two (2) barrel or one four barrel or one Predator carburetor properly installed will be permitted. Must be naturally aspirated. No fuel injection.
2.14 Drive shaft
2.14a Loop required and must be constructed of at least ¼ inch by two (2) inch solid steel and should be mounted no more than six (6) inches from the front of the drive shaft tube. Two driveshaft loops of ¼ inch by one (1) inch solid steel fastened to the crossmember of the car is an allowable alternative.
2.14b Drive shaft must be painted white. Steel drive shaft only.
2.15a O.E.M. production type transmissions – 3,4,and 5 speed and automatic. No “in and out” boxes. Must all be clutch operated. Bert and Brinn transmissions are also allowed. (With motor running and car in still position, driver must be able to engage car in gear and move forward, then backward at time of inspection.)
2.15b Clutch must be inside bellhousing for O.E.M. production type transmissions.
2.15c One forward gear and one reverse gear must be in working order plus a neutral position, and must be able to be shifted by driver.
2.15d All cars must be able to join lineup on demand, unaided, or go to the rear of that race.
2.15e Clutch type transmissions must be equipped with an explosion proof steel bellhousing. Aluminum must be SFI approved. GM bellhousing is not SFI approved.
2.15f Automatic transmissions must have a guard 270 degrees around flexplate or flywheel, must be constructed of at least ¼ inch steel. If preferred, an SFI approved aftermarket guard may be used instead. Bert/Brinn type with aluminum bellhousing must use above rule.
2.15g All vehicles must have the capability of starting without being pushed or pulled.
2.16 Rear end
2.16a Any passenger car type or truck rear end may be used. No aluminum allowed except lowering blocks, axle cap and drive plate.
2.16b No quick change devices allowed. No cambered rear ends (one piece drive flange only).
2.16c No traction devices allowed (includes Gold Track, True Track – type rear end components).
2.17a Steering must be O.E.M. No rack and pinion allowed. Must remain within original bolt pattern for type of frame used. In cockpit, steering may be modified to suit driver, but must remain on left side of cockpit. No center steering.
2.18a No transmitting or listening devices allowed in car.
2.19 Suspension – No aluminum or titanium! Magnet must stick to all components.
2.19a Front suspension must remain stock type for the type of frame being used. Steel aftermarket parts may be used as stock components as long as they mount in the stock location and are the same size as the O.E.M. parts. This does include lower tubular A-frames. If using lower tubular must match factory specs.
2.19b Stock passenger car spindles only; no fabricated spindles. Bottom A-frames cannot be altered, lightened or moved.
2.19c Front sway bars may be used. They must be made of steel and may be attached to the bottom A-frame using steel heim joints. Sway bars must be solid full-length O.E.M. sway bars. Rear panhard bars may be used. They must be made of steel and may be attached by using a minimum ¾ inch I.D. steel heim joint.
2.19d Steel coil-over eliminators, or steel/aluminum coil-over kits allowed- must conform to shock and spring rules.
2.19e One shock per wheel only. No air shocks.
2.19f Only steel suspension or rearend parts allowed (jack bolts and mounting brackets may be aluminum).
2.19g All coil springs must be at least 4-1/2 inches outside diameter. Steel springs only. No torsion bars allowed in rear.
2.19h Steel tube-type upper A-frames allowed and can be moved.
2.19i A-arm cross shafts & swedge tubes can be aluminum.
2.20a All engines used in competition must be able to be used in conventional passenger car without alteration. Motor mounts cannot be removed or altered. Castings and fittings must not be changed. No machine work on outside of engine or on front or rear of camshaft.
2.20b No total “dry sump” systems allowed. “Wet” system must be operative and will go with engine claim.
2.20c Cooling system may be modified. Radiators and oil coolers must not protrude above interior.
2.20d Any American make engine may be used as long as rear of engine (bellhousing flange) is mounted at least seventy-two (72) inches forward from the center line of the rear axle, no tolerance.
2.20e Engine offset must be kept within two (2) inches of centerline of front cross member. Engine must be a minimum of eleven (11) inches from ground to front center of crankshaft.
2.20f Steel engine blocks only – No aluminum or titanium.
2.20g All overflow tubes must be directed towards the ground, inside the frame rails. Radiators must be mounted in front of engine only.
2.20h All wiring elements must be accessible for tech inspection. Any car advancing spots and missing will be black-flagged.
2.20i Aluminum heads legal must add fifty pounds in front of mid plate 2,400-pound weight rule. All cars with less than 23 degree heads must weigh 2500 lbs. and add fifty pounds in front of mid-plate if using aluminum heads. Any driver caught using less than 23-degree heads and weighing 2,400 will lose all points for season, and all money for that race. Only exception to this rule will be Chrysler.
2.20j Any car using flat tappet cams can weigh 2350 after race with driver.
2.20k ALL PART AND/OR CASTING NUMBERS MUST BE PRESENT. Any driver that has removed any numbers is subject to disqualification and suspension.
2.21a No magnetos or crank triggered ignitions. No more than one coil may be used.
2.21b Kill switch required within easy reach of the driver. The switch must be clearly marked “off” and “on”.
2.22a Racing seats are mandatory, but must be factory manufactured and acceptable to USMTS or track officials. Positively no homemade aluminum, plastic or fiberglass seats allowed. Seat must be properly installed and seat back cannot be moved back further than rear edge of quarter post. High back aluminum seats only.
2.23 Overall Car Weight
2.23a 2400 lb. weight rule is effect for the modifieds after the feature with steel heads. Aluminum heads must have fifty pounds in front of mid-plate. Any car using less than 23-degree heads must weigh 2500 pounds. If using aluminum heads must weigh 2500 pounds and add fifty pound in front of mid-plate.
3. Safety requirements
3.1 Helmets are required and must be approved SHCA or Snell-type full coverage and must be worn at all times the car is on the track.
3.2 Helmets should accompany vehicle at time of inspection.
3.3 Helmets of at least Snell SA95 or SA2000 rating are mandatory.
3.4 Complete one-piece or two-piece fire suits of a flame retardant nature must be worn by all competitors at all times the car is on the track, including packing, warm ups, hot laps and races.
3.5 Fire resistant gloves and shoes are mandatory.
3.6 Five (5) point safety belts, sub belt and shoulder harness required. No factory type shoulder belts or straps allowed.
3.7 Metal to metal buckles are required on shoulder and seat belts.
3.8 The shoulder harness should be mounted securely to the roll cage. Seat belts and shoulder harness recommended not to be more than one (1) year old.
3.9 Where the belt passes through the seat edges, it must have a grommet installed, be rolled and/or padded to prevent cutting of the belt.
3.10 A full-size window net mounted in the left side driver’s window or approved racing arm restraints are required. Window net mounts must be welded to the roll cage. All bars around driver must have roll bar padding.
3.11 A quick release metal coupling on steering wheel mandatory. Absolutely no plastic couplings allowed.
3.12 Fire resistant safety neck collars are mandatory.
3.13 It is recommended that each car have built-in fire extinguishing equipment, but cannot be of the dry powder type (must be Halon 1211 or equivalent).
3.14 All entrants should have in their pit area as part of their equipment, at all times, a fully charged dry chemical, Halon, or its equivalent, fire extinguisher. Ten (10) or thirteen (13) pound fire extinguishers recommended.
3.15 Everyone must wear the required helmet, drivers suit and five point safety harness whenever in a race car, including packing, warm ups, hot laps and races.
4. Engine claim rules
4.1 $650 claim. Any driver wishing to claim a motor must pull directly to the designated claim area. That driver will pull a pill from 1-5 and that is the driver that he/she will be allowed to claim. If the claimee decides that he/she does not want that motor he/she will still be charged one claim on the claim card. All drivers in the top five each race night are eligible to be claimed and must pull directly to the claim area.
4.2 Claim does not include – 1. Flywheel, 2. Clutch, 3. Pressure plate, 4. Bellhousing, 5. Headers, 6. Carburetor, 7. Starter, 8. Motor mounts, 9. Sending units and switches for oil prressure and water temperature, 10. Carburetor adaptor, 11. Fan and pulleys, 12. Clutch ball, 13. Clutch arm, 14. Throw out bearing, 15. Dip stick, 16. Water pump, 17. Fuel pump, 18. Distributor, 19. Plug wires, 20. External oil restrictors (must furnish plugs) and 21. Water outlet and restrictor.
4.3 First five finishers must report directly to claim area and are subject to engine claim by any other driver finishing sixth on back in feature. Any driver lapped by the leader is not eligible to claim. Driver allowed one claim only per event, regardless of the outcome of that claim. Drivers finishing farthest back will draw first.
4.4 Driver making claim must drive his/her race car immediately after finish of feature, under its own power, directly to the claim area.
4.5 ONLY drivers and officials allowed in claim area. Any car with crew members or any other persons associated with car entering the claim area will be immediately disqualifies and subject to fine and/or suspension.
4.6 Claims must be made within five (5) minutes of end of feature race, and claimed engine must be removed within one (1) hour from time of claim is made and driver agrees to exchange/sell claimed engine.
4.7 Claims must be made to Track Official and $550 cash and claim card must accompany declaration of intention to claim.
4.8 Only driver may claim engine and only driver may agree to sell or refuse to sell engine. First sell statement by driver is binding.
4.9 Refusal to sell will result in forfeit of all cash and contingency winnings for the event.
4.10 Any driver refusing to sell forfeits his/her right to make a claim in any USMTS points event for a period of one (1) year following refusal, plus all USMTS points accumulated up to and including event that claim is made.
4.11 First refusal to sell will result in the driver being suspended from all USMTS point events until a $1,000 fine is paid and received at the USMTS headquarters. Second refusal will result in driver being suspended for thirty (30) days and until a $5,000 fine is paid and received at the USMTS headquarters.
4.12 Any driver found to be claiming an engine for anyone other than his or herself will lose all USMTS points for entire season, all cash and contingency winnings for the event and be subject to a thirty (30) day race suspension and until A $1,000 fine is paid and received at the USMTS headquarters.
4.13 All claimed engines must be removed at the track.
4.14 Any sabotage of claimed engine or engine of buyer will result in driver being suspended for fourteen (14) days and until a $1,000 fine is paid and received at USMTS headquarters. All USMTS points will be forfeited for entire season, as well as the right to make a claim for a period of one (1).
4.15 No driver may claim more than three (3) engines during the USMTS season.
4.16 Drivers must have raced the three (3) previous events prior to the one in which he is claiming.
4.17 USMTS Officials have the right to disallow any claim at their discretion.
4.18 No driver receiving a provisional starting position in the feature is allowed to claim.
4.19 Driver must have a valid USMTS license to be eligible to make a claim.
4.20 USMTS or track officials have the right to claim any motor of any car in the A-feature field for $550 at their discretion.
5. Decisions of USMTS Officials are final and binding without exception.
6. These rules have been set by the USMTS office and can be changed or amended without notice. All promoters will be told of any changes and that change will be announced at drivers meeting.
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1. SAFETY EQUIPMENT: Rules apply at all times car is on track. Snell-rated SA95 or SA2000 helmet required. Roll bar padding required in driver compartment (Fire retardant recommended). SFI-approved full fire suit, fire retardant neck brace, gloves and shoes required. Fire extinguisher or fire system must be installed. Recommended: Fire retardant head sock and underwear; head and neck restraints; collapsible steering shaft. Driver-side window net required, minimum 16 incehs x20 inches ribbon or mesh style, and must be mounted so latch is at top front of window. Minimum three-inch wide five-point safety belt assembly required, must be mounted securely to roll cage, recommended to be no more than one-year-old. Kill switch required within easy reach of driver and must be clearly marked ‘OFF’ and ‘ON’.
2. FRAME: Any American OEM full body rear wheel drive passenger car must be full frame bumper to bumper or unibody. Minimum 108-inch wheelbase unless running unibody and then must be at least 110” wheelbase. Frame must match body — GM to GM, Ford to Ford, Chrysler to Chrysler — AND wheelbase to wheelbase. Rear of frame behind rear tires, from a point no further forward than one inch behind factory seam, may be replaced in OEM location with two-inch by three-inch steel tubing with .095-inch wall thickness. Factory seam must remain visible.
3.ROLL CAGE: Main cage must consist of continuous hoops, minimum 1.50-inch O.D. tubing, with a minimum wall thickness of .095-inch, low carbon or mild steel recommended. Four-post roll cage required, front down bars and rear hoop must be welded to OEM frame. Driver’s head must not protrude outside cage with helmet on. No offset cages. Rear hoop must have “X” brace, consisting of one full horizontal and one full diagonal bar, minimum 1.25-inch O.D. and .083-inch wall thickness. Front down bars must be tied together, passenger side front down bars must be maximum 11 inches in from top of door. Must be minimum 40 inches between front and rear down bars at top of door panel. Maximum 41 inches (48 inches for 1988-1996 GM bodies) from top center of windshield to front edge of rear hoop; maximum 13 inches (20 inches for 1988-1996 GM bodies) to front edge of top halo. Top halo must be minimum 40 inches across, outside to outside. Rear hoop may be maximum 12 inches in from bottom of opera window. Minimum one cross bar in top halo. May have maximum two horizontal bars, (in addition to bar tying front frame horns together) for radiator protection; must be behind bumper, within confines of body, no wider than stock frame horns. Required rear kickers (down bars) and engine hoop must be minimum 1.25-inch tubing, with .083-inch wall thickness. Fuel cell protection required, must be mounted frame rail to frame rail, no higher than fuel cell, inside trunk area with maximum 1.75-inch tubing. All bars must be inside body. Foot protection bar required.
4. DOOR BARS: All door bars and uprights must be minimum 1.50-inch O.D. and .095-inch wall thickness. Minimum three door bars, both sides, parallel to ground, and perpendicular to driver. Minimum four uprights tied from frame to top door bar on driver side, and minimum three uprights on passenger side. Steel doorplates, 18 gauge or .049-inch minimum thickness, must be securely welded to outside of door bars on driver’s side. Plate must cover area from top door bar to frame and from rear down post to five inches in front of seat. Must be visible for inspection.
5. BODY: Must be approved, unaltered OEM, and centered over wheel wells. Floor pan, fire wall and trunk pan must remain OEM for that frame in OEM location from front bumper to rear firewall. May use 1988-1996 Cutlass, Grand Prix, Lumina, Regal or Monte Carlo body on 1978-1987 GM 108-inch wheelbase full frame. Sunroofs and T-tops must be enclosed. OEM or aftermarket plastic nose and tail pieces allowed, must match body on 1988 and newer. Spoiler allowed, max six inches in material height, no wider than the body and no side or center bracing allowed. Hood and front fenders may be gutted, must remain original size. Rear of hood must be sealed off from driver compartment with metal. Hood must be separate from fenders and in OEM location. Front and rear inner wheel wells may be removed. Trunk lid cannot be gutted and must remain original size. No overlapping or shortening of body panels. All windows must remain open, except opera windows may be covered with clear lexan, no decals. Maximum seven-inch metal sun visor may be added to top of windshield opening. Wheel wells may be slightly trimmed for tire clearance. No reflective body panels. Cars must be numbered with large legible numbers on both sides and top. Numbers should be in contrasting colors.
6. DRIVER COMPARTMENT: Minimum of three windshield bars in front of driver. Aluminum high-back seat only, bolted to roll cage. Seat may be no further back than rear edge of B-pillar on Ford and 1987 and older GM bodies. Seat must be mounted in front of the original front door post. Driver must be sealed off from track, driveline, engine and fuel cell. Dash not to extend more than 24 inches back from center of lower windshield opening. Dash must be flat, rear can be no higher than front, except for cowl in front of driver. No other interior tin or covers. Inside rear quarter panels, below window level, may be removed. Doors may be gutted, roof may be trimmed for roll cage clearance. Kick and rocker panels may be removed. No cutting on floor pan, any holes must be covered from underside with metal. Rear firewall and speaker deck must be metal and be of OEM design for that body. Front firewall from factory seam up may be replaced with minimum .049-inch thickness steel. All holes in firewalls must be covered with metal. May enclose interior or right side of car but must have trap door for inspection.
7. FRONT SUSPENSION: All components and mounts must be steel, unaltered OEM, in OEM location and match frame. Rubber, nylon or steel lower A-frame bushings only, no offset or bearing type. Weight jacks optional, must be in original centerline of spring tower. No devices allowed enabling driver to alter wheelbase or weight jacking while racing. For 1978-1987 G.M. mid-sized metric frame, OEM upper A-frame . Single hole shock mounts only.
8. STEERING: All components must be steel, unaltered OEM, in OEM location and match frame. Bolt on spindle savers allowed. OEM steering column may be replaced with steel steering shafts (collapsible recommended). Steel knuckles only. Steering quickener, steering wheel and quick release may be aluminum.
9. SHOCKS: One steel non-adjustable unaltered shock per wheel. No coil over, air, or remote reservoir shocks, or Schrader valves. No coil over eliminators.
10. SPRINGS: One steel spring per wheel only. All coil springs must be minimum 4.5-inches O.D. and non-progressive.
11. REAR SUSPENSION: All components and mounts must be steel, unaltered OEM, in OEM location, and match frame. Rubber or nylon control arm bushings only, no offset or bearing type. Welded single-hole shock mounts only. Coil springs may be moved, but 50% must be located over top of rear end housing. No independent rear suspension. Shocks may be moved, but must remain behind housing. No weight jacks in rear of car.
12.REAR END: Any steel approved OEM passenger car or truck non-cambered rear end allowed. Safety hubs (floater) allowed. No pan hard bars. All components must be steel, except: lowering blocks, axle cap, and drive flange may be aluminum. Inspection hole in housing required. Full steel spool, steel mini spool or welded rearends only. Steel axles only. No quick change devices. One piece drive flange only. No torque-dividing differentials. No scalloped ring gears. No traction devices of any kind, torque arms, etc. Sway bars must be O.E.M. and in O.E.M. location.
13. BUMPERS: Front and rear tow hooks mandatory. Steel bumper mounts only. One of two options must be used: OEM: Bumpers not covered by plastic nose or tail piece must be complete, unaltered OEM with no sharp edges. Must have steel connecting ends to body. No bars past outside edge of body other than rub rails. Aftermarket: Fabricated tubular bumpers allowed, but must be covered by plastic nose or tail piece and bent to fit with rounded ends. Main bumper bar must be minimum 1.5-inch OD by .083-inch wall thickness on front, and 1.50-inch OD by .120-inch wall thickness on rear.
14. TIRES/WHEELS: Must use unaltered American Racer tire, G-60 (KK704) with I.M.C.A. stamped on sidewall or Hoosier asphalt take off (10.0/27.0-15 SERIES OR 1053, 1060) New Hoosier tire a possibility (watch for rule updates in future). Numbers must be visible for inspection. All tires must pass a derometer test to a minimum of 55 hardness. Grooving of tires is allowed. No re-caps. All wheels must be steel racing wheels and have no bead locks except for the right rear, and wheel cannot be any narrower than 8 inches and no wider than 10 inches. No wide fives. Steel bolts only. One foam or plastic mud cap allowed on right rear only. No bleeder valves.
15. BRAKES: Steel, unaltered OEM, or unaltered OEM replacement, operative four wheel, drum or disc. Front components must match frame. Must maintain minimum OEM dimensions for hubs/rotors and calipers, cannot be lightened. Bolt pattern may be changed. Larger studs allowed. Rear rotors may be aftermarket, minimum 0.810-inch thickness. Vented rotors only, no scalloped rotors. No floating brakes. No brake shut-off or pressure sensitive devices. One proportioning device allowed, front to rear only. Brake lines must be visible. Aftermarket pedal assembly allowed.
16. EXHAUST: Round tube headers only. No exhaust through body panels or fenders. All mufflers must be 100 d.b. at 100 feet or less. All exhaust must go through muffler, two per car, one per header. No exhaust sensors.
17. FUEL SYSTEM: Any four barrel carburetor, dual line is OK. Mechanical push rod fuel pumps only. Maximum 33 gallon racing fuel cell required, must be in 18-gauge steel container. Must be securely fastened in trunk above level of top of rear frame rails, by minimum two .125-inch thick solid steel straps, two inches wide around entire cell. Metal firewall must be between driver and fuel cell. All cell mounts must be steel, securely welded to frame/cage. No adjustable fuel cell mounts. Fuel cell vents, including cap vent, must have check valves. Fuel lines through driver compartment must run through metal pipe or metal conduit. No fuel filters in driver’s compartment. Limit of one fuel filter. No cool cans. Air cleaner top cannot direct air into carburetor. No top flow air cleaner housings, cold air boxes or air cleaner duct work.
18. FUEL: Gasoline only, no ethanol. No performance enhancing additives or scented additives. Fuel must pass both dielectric meter and chemical tests. Fuel sample may be taken from any car at any time. Penalty for illegal fuel is disqualification from event and $250 fine – first offense.
19. WEIGHT: Minimum weight limit of 3,100 pounds, after race with driver in car. No tolerance. No weights and/or loose objects in driver compartment or outside body and must not be visible. Weights must be securely mounted to frame or roll cage and painted white with car number on it. Must be attached with at least two .5-inch bolts. No titanium, magnesium or carbon fiber products. No gun-drilled, tubular, hollow bolts or studs. Steel fasteners only.
20. BATTERY/STARTER: One 12-volt battery only, must be in marine-type case securely mounted to frame or roll cage in metal frame. Starter must bolt in OEM location. Must have capability of starting without being pushed or pulled. Must leave initial staging area on demand, unaided, or go to rear of that race.
21. GAUGES /ELECTRONICS: MSD Ignition is allowed for the 2006 season. No transmitting or listening devices, timing retard controls, or digital gauges (including tach). No electronic monitoring computer devices capable of storing or transmitting information except analog tach. No adjustable ignition control boxes. Only one 12-volt ignition box allowed, must be out of driver’s reach. No additional ignition accessories. Only change allowed to ignition box is one high-end rev-limiter. Setting can be changed through one chip only, or an internal setting inside box. No alternators or magnetos. OEM firing order cannot be changed. No electronic traction control devices.
22. TRANSMISSION/DRIVE SHAFT: Must have at least two forward gears and one reverse, plus neutral position. With motor running and car in still position, must be able to engage car in gear and move forward, then backward. Only OEM production type transmissions allowed – two-speed, three-speed, four-speed and automatic. No five speed (or more) transmissions, ‘in and out’ boxes, or quick change devices allowed. Functioning shift levers must be in OEM location. Flywheel/flexplate must be bolted directly to end of crankshaft, and pressure plate must be bolted directly to flywheel/flexplate. One flywheel/flexplate only, and all driveline components within bellhousing must rotate consistent with engine RPM while car is in any gear. Unaltered flexplate must be full, OEM, or OEM replacement. Manual: Must be OEM case and working clutch inside explosion-proof steel bellhousing – minimum 270 degrees around top of clutch/flywheel area. Automatic: Must remain in OEM appearing automatic case with a functioning OEM appearing pump. Original OEM bellhousing must have an approved scatter shield, constructed of minimum of .125-inch by three-inch steel, 270 degrees around flexplate. Drive Shaft: Minimum 2-inch diameter steel drive shaft, must be painted white with car number clearly added. Steel slip-yokes only. 360-degree drive shaft loop required and must be constructed of at least .25-inch by two-inch steel, or one-inch tubing, mounted six inches back from front U-joint.
23. ENGINE COMPARTMENT: Number 1 spark plug must be even or in front of upper ball joint. Frames and crossmembers may not be altered for engine placement. Engine mount holes cannot be removed or altered on engine block. Aftermarket engine mounts allowed. Engine must be OEM appearing, must be able to be used in conventional passenger car without alteration. GM with GM, Ford with Ford, Chrysler with Chrysler. Cooling systems may be modified. Steel or aluminum radiator, and must be mounted in front of engine. Overflow tubes must be directed to ground, between frame rails. Accumulators and Accusumps allowed, but cannot be mounted on door bars.
24. ENGINE SPECIFICATIONS: Steel heads, block and oil pan only. OEM block only, except no GM Bowtie, Ford SVO or Chrysler W-2 blocks. Castings and fittings can not be changed, no machine work on outside of engine. No cubic inch limit. May use roller tip rocker arms. OEM cast iron intake or dual plain aluminum intake may be ported/polished. May use adapter with two maximum .100-inch gaskets on intake. No high rise intakes. Oil pump must be in stock location and O.E.M.. Aluminum water pumps allowed.
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*ALL CARS ARE SUBJECT TO OFFICIALS APPROVAL.
**BODY*- OEM STEEL HOODS ONLY WITH HOLE FOR AIR CLEANER BUT MUST HAVE BOX BUILT AROUND IT. ANY YEAR OR MODEL REAR WHEEL DRIVE AMERICAN PRODUCTION CAR. FULL FRAME CARS. IF A UNI-BODY FRAME, IT MUST BE CONNECTED. NO FRONT WHEEL DRIVE CARS.
*ALL CARS ARE TO REMAIN STOCK IN ALL ASPECTS. TUBE FRONT & REAR BUMPERS ALLOWED BUT MUST HAVE STOCK-APPEARING NOSE. ALL CARS MUST HAVE FRONT AND REAR HOOKS FOR LIFTING AND TOWING.
**FRAME*- FRAME MUST MATCH BODY AS STOCK. WHEEL BASE OF 106 INCHES FROM AXLE TO AXLE MINIMUM. MUST BE STOCK IN ALL ASPECTS. NO CUTTING OR ALTERING OF THE FRAME. NO WEIGHT JACKS OR TRANSFER DEVICES OF ANY KIND WILL BE PERMITTED. RADIATOR BRACE ALLOWED-OUT TO BUMPER ONLY. FRONT HOOP ALLOWED IN PLACE OF CORE SUPPORT. HOOP CANNOT BE CONNECTED TO THE CAGE IN ANY WAY. HOOP CAN BE FROM ONE SIDE OF THE FRAME TO THE OTHER BUT CANNOT BE FASTENED TO ROLLCAGE TO SUPPORT RADIATOR. YOU CAN RUN BAR FROM ROLLCAGE TO FRONT OF A-FRAME BUT CANNOT BE CONNECTED TO THE OTHER SIDE.
**BRAKES*- MUST HAVE STOCK FOUR WHEEL BRAKES WITH OEM STOCK BRAKE PADS. STEEL BRAKE PADS OR OTHER MATERIAL WILL NOT BE PERMITTED. MUST HAVE OEM MASTER CYLINDER AND PEDAL ASSEMBLY. NO SHUT OFF VALVES OR ADJUSTERS OF ANY KIND.
**ROLL BARS*- FOUR POINT ROLL BAR CAGE REQUIRED. ONE BAR CAN BE RUN FROM FRONT OF A-FRAME TO ROLLCAGE. NO CROSSOVER BAR. ALL WELDS MUST BE GUSSETED. MINIMUM OF FOUR BARS IN THE DRIVERS DOOR. ROLL CAGE MUST BE CROSS-BRACED. CAGE MUST BE A MINIMUM OF 1 ½ INCH PIPE WITH MINIMUM WALL THICKNESS 0F .095 AND CANNOT BE THICKER THAN .125. ROLL CAGE BRACE ALLOWED DOWN TO CENTER OF REAR END. RADIATOR BRACE ALLOWED NOT EXTENDING PAST A-FRAMES. REAR FUEL CELL LOOP ALLOWED NO WIDER THAN FRAME RAILS. CANNOT CONNECT TO ROLL CAGE OR EXTEND FORWARD.
**SEAT AND BELTS*- TOP OF SEAT MUST BE IN FRONT OF DOOR POST. ALL CARS MUST BE EQUIPPED WITH RACE-TYPE SEAT, SHOULDER HARNESS AND SEAT BELTS THAT ARE SAFETY APPROVED. MUST BE BOLTED TO FRAME OR ROLL BAR. **GAS TANK*- ALL CARS MUST HAVE GAS TANKS SECURELY FASTENED TO THE FRAME IN THE TRUNK. FUEL CELL OK-MUST BE MOUNTED INSIDE THE TRUNK. ALL CARS MUST HAVE FIRE EXTINGUISHER, FUEL CELL NOT TO EXTEND THROUGH TRUNK FLOOR. ANY SIZE FUEL CELL ALLOWED. RACING FUEL ONLY. N0 ADDITIVES. FUEL CELL BOX CANNOT BE MADE OF ANY HEAVIER GAUGE METAL THAN .050.
**TIRES*- HOOSIER G-60, HOOSIER 500, AMERICAN RACER (IMCA STAMPED), AND SWS G-60 TIRES. NO DOT TIRES ALLOWED. SIPING OR GROOVING TIRES ALLOWED. MUST RUN SAME TIRES ON ALL FOUR WHEELS. CANNOT RUN BEADLOCKS. **REAR WEIGHT PERCENTAGE*- 47%.
**WHEELS*- RIGHT FRONT WHEEL MUST BE RE-ENFORCED OR STEEL SPOKE WHEEL MAY BE USED. 8 INCH MAX WIDTH STEEL. OFFSET WHEELS OK AS LONG AS 8”. **REAR ENDS AND DRIVELINES*- REAR ENDS MAY BE LOCKED. ALL CARS CAN RUN A NINE INCH (9 INCH) FORD BUT MUST RUN STOCK SUSPENSION ONLY. REAR END PINION ANGLE MUST BE SAME AS STOCK REAR END. TRELLING ARMS MUST BE STOCK. NO LENGTHENING OR SHORTENING. MUST RUN RUBBER OEM BUSHINGS ONLY-NO OFFSET. MUST HAVE BUSHINGS. MOUNTS MUST BE IN STOCK LOCATION ON REAR END.
**TRANSMISSION*- MUST HAVE ALL GEARS WORKING THAT IT COMES OUT WITH. ALL CARS MUST HAVE STOCK OEM TRANSMISSION. ALL CARS WITH AUTOMATIC TRANSMISSION MUST HAVE ALL WORKING GEARS. NO REVERSE FLOW VALVE BODIES. NO MODIFICATIONS WHATSOEVER. A STOCK TORQUE CONVERTER MANDATORY. A SCATTER SHIELD IS RECOMMENDED. NO DIRECT DRIVE OR SPUDS ALLOWED. NO MINI CLUTCH.
**SUSPENSION*- BOLT ON SPINDLE SAVERS ALLOWED. NO MODIFYING OF SUSPENSION ALLOWED. _ THIS MEANS NONE!_ NO TRACTION DEVICES OR TORQUE ARMS OF ANY KIND. MUST USE SPRINGS IN STOCK LOCATION. NO MODIFICATIONS. NON-ADJUSTABLE RACING SHOCKS ALLOWED. SHOCKS MUST BE IN STOCK LOCATION. NO QUICK STEERING ALLOWED. IF CAR COMES OUT WITH RACK AND PINION, IT HAS TO BE OEM FACTORY. AFTERMARKET POWER STEERING ALLOWED. ABSOLUTELY NO WEIGHT ADDED! *DISCONNECT ON STEERING WHEEL ALLOWED. NO ADDED WEIGHT OF ANY KIND ALLOWED. ALTERING OF STEERING COLUMN ALLOWED.
**BATTERY*- BATTERY MAY BE MOVED INSIDE OF CAR, IN A PROTECTED POSITION AND SECURELY FASTENED. ONE BATTERY PER CAR AND MUST BE A PASSENGER CAR BATTERY. NO EXCEPTIONS! **RADIATOR*- RADIATOR AND TRANSMISSION COOLER MUST BE MOUNTED UNDER THE HOOD. ALUMINUM RACING RADIATOR ALLOWED.
**IGNITION*- NO AFTERMARKET DISTRIBUTORS. MUST REMAIN STOCK.
**FIRE SUITS*- SUITS OF A FLAME RETARDANT NATURE MUST BE WORN BY ALL COMPETITORS. SNELL APPROVED HELMETS ONLY. **HEADERS*- HEADERS WILL BE ALLOWED-3 INCH MAXIMUM COLLECTOR AND PIPE PAST DRIVER. NO CROSSOVERS.
**INTAKES*- OEM FACTORY CAST IRON INTAKE AND MARINE INTAKE ALLOWED. NO ALUMINUM INTAKES ALLOWED. PORTING & POLISHING ALLOWED. **ENGINE*- STOCK STEEL BLOCK ONLY. MUST HAVE STOCK FACTORY CASTING NUMBER. ROLLER ROCKER ARMS ALLOWED. STUD GIRDLES ALLOWED. ENGINE MUST BE IN STOCK LOCATION. SECOND SPARKPLUG MUST BE EVEN OR IN FRONT OF BALL JOINT. IT CANNOT BE BEHIND BALL JOINT. _HEADERS WILL BE ALLOWED_-3 INCHES MAXIMUM COLLECTOR AND PIPE PAST DRIVER. NO CROSSOVERS.
**HEADS*-ANY OEM HEADS ALLOWED. PORTING AND POLISHING ALLOWED.
**CARBURETOR*-ANY 2 BARREL OR 4 BARREL CARBURETOR ALLOWED. NO DOUBLE PUMPERS. MUST BE SINGLE LINE VACUUM SECONDARY. **NO EXCEPTIONS*-NO MIRRORS 0R REFLECTING DEVICES OF ANY KIND. ALL GLASS, CHROME AND TRIM MOLDINGS, ETC. THAT MAY BE JARRED LOOSE OR RIPPED OFF MUST BE REMOVED FROM CAR. FRONT WINDSHIELD TO BE REPLACED BY GRAVEL SCREEN. GUTTING OF INNER FRONT FENDERS WILL BE ALLOWED. MUST HAVE STOCK FLOOR PAN, STOCK FIRE WALL, AND TRUNK PAN. ALL DOORS MUST BE BOLTED OR WELDED SHUT. REAR STOCK FIRE WALL IS REQUIRED BETWEEN DRIVER COMPARTMENT AND THE GAS TANK. TRUNK MUST BE SECURED DOWN. NO CLOSED INTERIORS. NO SPOILERS. CAMAROS, FIREBIRDS, AND TRANS-AMS ARE NOT LEGAL.
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BODY ALL CARS TO REMAIN STOCK IN ALL ASPECTS AND MUST HAVE COMPLETE STOCK BODY. MUST HAVE FACTORY FRONT AND REAR BUMPERS NO MIRRORS OR REFLECTING DEVICE OF ANY KIND ALL GLASS, CHROME, TRIM, MOLDINGS, ETC. THAT MAY FALL OFF MUST BE REMOVED FRONT WINDSHIELD MUST BE REMOVED AND REPLACED WITH A GRAVEL SCREEN OR MIN. OF 3 WINDSHIELD BARS IN FRONT OF DRIVER. REAR STOCK FLOOR PAN, FIREWALL, AND TRUNK PAN IN STOCK LOCATION AND COMPLETE FROM BUMPER TO BUMPER. ALL DOORS MUST BE BOLTED OR WELDED SHUT. TRUNK MUST BE SECURED DOWN. NO CLOSED INTERIORS. NO SPOILERS STOCK RADIATOR SUPPORT REQUIRED. SEAT MUST BE MOUNTED IN FRONT OF THE ORIGINAL FRONT DOOR POST CARS MUST BE NUMBERED WITH LARGE LEGIBLE NUMBERS ON BOTH SIDES AND TOP IN CONTRASTING COLOR. FRAME NO 2 DOOR UNIBODY, MUST BE 112 INCHES WHEELBASE IF RUNNING A UNIBODY. MUST BE STOCK IN ALL ASPECTS FRAME MUST MATCH BODY AS STOCK. WHEELBASE OF 108 INCHES MIN. NO CUTTING OR ALTERING OF THE FRAME. NO WEIGHT JACKS OR TRANSFER DEVICES OF ANY KIND. RADIATOR BRACE ALLOWED. BRAKE MUST HAVE STOCK 4 WHEEL BRAKES. MUST HAVE OEM MASTER CYLINDER AND PEDAL ASSEMBLY. NO SHUT OFF VALVES OR ADJUSTERS OF ANY KIND. ENGINES EXTERNAL PARTS MUST BE STOCK IN ALL ASPECTS. STOCK STEEL BLOCKS ONLY NO BOWTIE HEADS OR INTAKE. NO VORTEC HEADS. FLAT TOP OR DISH PISTONS ONLY. NO HEADERS. NO ROLLER ROCKER ARMS OR ROLLER TIPS. MUST HAVE MUFFLERS OR EXHAUST PIPE PAST DRIVERS SEAT. ENGINE MUST BE IN STOCK V8 LOCATION IF RUNNING A V8 MOTOR OR STOCK V6 LOCATION IF RUNNING A V6. ENGINE MUST PULL 15 LBS. VACUUM AT 1K RPM. BATTERY BATTERY MAY BE MOVED INSIDE OF CAR, IN PROTECTED POSITION AND SECURELY FASTENED. ONE 12VOLT BATTERY PER CAR. IGNITION NO AFTERMARKET DISTRIBUTORS. IGNITION MUST REMAIN STOCK. NO MSD OR ACCEL. CARBURETOR 1 SINGLE LINE 4 BARREL CARB. ONLY, VACUUM SECONDARY, NO MODIFICATION WHATSOEVER. NO ALCOHOL NO ELECTRIC FUEL PUMPS OR PRESSURE SYSTEMS NO SPACERS OR ADAPTERS OF ANY KIND. RADIATOR RADIATOR AND TRANS. COOLER MUST BE MOUNTED UNDER THE HOOD. ALUMINUM ALLOWED. ROLL BARS 4 POINT ROLL BAR REQUIRED FRAME MOUNTED FRONT HOOP IS OKAY ALL WELDS MUST BE GUSSETED. MIN. OF THREE BARS IN THE DRIVERS DOOR. ROLL CAGE MUST BE CROSSED BRACED. CAGE MUST BE A MIN OF 1 1/2 PIPE WITH MIN. WALL THICKNESS OF .095. RADIATOR BRACE ALLOWED REAL FUEL CELL LOOP ALLOWED SEAT AND BELTS METAL RACING SEAT ONLY, NO FIBERGLASS SEATS. 5 POINT RACING HARNESS THAT IS SAFETY APPROVED. SEATS/BELTS MUST BE BOLTED TO FRAME. GAS TANK ALL CARS MUST HAVE GAS TANKS OF HEAVY DUTY CONSTRUCTION AND MUST BE SECURELY FASTENED TO THE FRAME IN THE TRUNK. FUEL CELL IS OKAY FUEL CELL NOT TO EXTEND THROUGH TRUCK FLOOR. MAX. 22 GAL. FUEL CELL. NO AFTERMARKET CASE AROUND FUEL CELL. TIRES 70 OR 75 SERIES DOT TIRES ONLY. NO RACING DOT TIRES. NO RECAPS. WHEELS RF WHEEL MUST BE REINFORCED OR STEEL SPOKE WHEEL MAY BE USED 8IN MAX STEEL WHEEL. REAR ENDS AND DRIVE LINES REAR END MAY BE LOCKED. GM MUST RUN ON GM SUSPENSION, FORD ON FORD, ETC. NO AFTERMARKET PARTS, AFTERMARKET AXLES ARE OK. TRANSMISSION ALL CARS MUST HAVE STOCK TRANS. ALL CARS WITH AUTOMATIC TRANS. MUST HAVE TORQUE CONVERTER. NO DIRECT DRIVE OR SPUDS ALLOWED. NO MINI CLUTCH. SUSPENSION NO MODIFYING OF SUSPENSION ALLOWED. THIS MEANS NONE! NO TRACTION DEVICES OR TORQUE ARMS OF ANY KIND. MAY USE RACING SPRINGS AND SHOCK IN STOCK LOCATION NO QUICK STEERING OR RAC-N- PINION ALLOWED NO QUICK STEERING QUICK RELEASE STEERING WHEEL ALLOWED NO ADDED WEIGHT OF ANY KIND ALLOWED STARTERS MUST BE IN WORKING ORDER. SAFETY FULL FIRE SUIT REQUIRED AT ANY TIME YOUR ON THE TRACK ( 1 OR 2 PIECE) SNELL 90 APPROVED HELMETS ONLY, NO MOTORCYCLE HELMETS. FIRE EXTINGUISHERS OR FIRE SYSTEM MUST BE INSTALLED IN ALL CARS. NECK ROLLS, FIRE RESISTANT GLOVES AND FIRE SAFETY SHOES ARE HIGHLY RECOMMENDED GRAVEL SCREEN HIGHLY RECOMMENDED. 1. IF YOU HAVE WON A FEATURE IN ANY CLASS AT BOLIVAR, LEBANON, MONETT YOUR NOT ELIGIBLE TO RACE IN THIS CLASS. 2. 1ST TIME DISQUALIFICATIONS LOOSE ALL POINTS AND MONEY. 2ND TIME DISQUALIFICATIONS RESULTS IN BEING EXPELLED FROM ALL THREE TRACKS FOREVER OR MOVE UP TO BOMBER CLASS. 3 DRIVER IS ALLOWED TO WIN ONLY 10 RACES A YEAR AT ALL THREE TRACKS AND FIFTEEN RACES IN A CAREER DRIVER MUST THEN MOVE UP TO BOMBER CLASS OR QUIT!
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THE SPIRIT AND INTENT OF THESE RULES ARE TO KEEP DOWN THE COST OF RACING. ANY ATTEMPT TO CIRCUMVENT THIS INTENT WILL NOT BE TOLERATED.
* FRAMES – FACTORY PRODUCTION COMPLETE FULL AMERICAN PASSENGER FRAMES ONLY. FRAME RAILS MUST EXTEND TO A POINT BEYOND THE BASE OF DRIVERS SEAT. REAR CLIP MAY BE FABRICATED OUT OF TUBING. FRONT AND REAR PICK UP LOOP REQUIRED; OTHERWISE BUMPERS OR OTHER PICK UP POINT WILL BE USED.
* BODIES – SAME AS A – MOD BODIES. AMERICAN COMPACT PASSENGER CARS ONLY. SUCH AS PINTO, MONZA, GREMLIN, DAYTONA, MUSTANG II, ECT. FIBERGLASS OR METAL DUPLICATES MAY BE USED BUT MUST BE RECOGNIZABLE AS FACTORY PRODUCTION, AND MUST HAVE A COMPLETE PAINT JOBS. (SAME AS ALUMINUM A MOD BODY.) ORIGINAL ROOFLINE OF BODY MUST BE MAINTAINED WITH A MAXIMUM TWO IN DROP REAR TO FRONT. TOP TO BE ROUNDED IN ALL DIRECTIONS. NO FLAT TOPS. ALL CARS MUST HAVE FULL FLOORBOARDS AND FIREWALLS, BOTH FRONT AND REAR. ALL CARS MUST HAVE SHEETING OF SOME SORT AT REAR OF CAR AT TRUNK AREA. REAR BUMPER TO DECK LID ENCLOSURE OPTIONAL. IF ENCLOSED IT SHOULD BE A SOLID PANEL AT LEAST EIGHT IN HIGH AND INCLUDE CAR NUMBER. IF NO REAR PANEL USE FIVE IN BY FIVE IN NUMBER PLATE ON REAR. DRIVER AND PASSENGER SIDE WINDOWS MUST HAVE AT LEAST 12 IN VERTICAL OPENING. DRIVERS WINDOW MUST HAVE APPROVED WINDOW NET. NO SPOILERS WINGS OR ANY OTHER TYPE OF AIR/ GROUND EFFECTS ALLOWED ANYWHERE INSIDE OR OUTSIDE THE CAR. NO PROTRUDING OBJECTS ALLOWED. ALL CARS MUST HAVE LARGE LEGIBLE NUMBERS ON BOTH DOORS AND TOP IN CONTRASTING COLOR FROM BODY. NUMBERS MUST BE AT LEAST FOUR IN. THICK AND EIGHTEEN HIGH. LEGIBLE CAR NUMBER AT LEAST FIVE IN HIGH AND ONE IN THICK ON FRONT AND REAR. BODIES SHOULD EXTEND NO FURTHER FORWARD THAN BACK OF BLOCK. MIN. OF THREE SAFETY BARS MUST BE INSTALLED IN FRONT OF DRIVER AND MAY HAVE SCREEN ATTACHED THERETO. NO SPOILERS!!!
* WHEELBASE – 108 IN MIN. 12 IN MAX BOTH SIDES
* ROLL CAGE – MUST CONSIST OF CONTINUOUS HOOPS NO LESS THAN ONE AND ONE HALF IN OUTSIDE DIAMETER AND MUST HAVE A WALL THICKNESS OF AT LEAST .095IN. MUST BE FRAME MOUNTED CONFIGURATION OF FRONT AND REAR HOOPS CONNECTED BY TUBING ON SIDES OR SIDE HOOPS IN A MANNER DEEMED ACCEPTABLE BY THE INSPECTOR. DRIVERS HEAD MUST NOT PROTRUDE ABOVE CAGE WITH HELMET ON WHILE STRAPPED IN DRIVERS SEAT. ROLL CAGE MUST HAVE A 3/16- IN INSPECTION HOLE IN NON CRITICAL AREA. MUST HAVE AT LEAST 3 HORIZONTAL BARS AT DRIVERS DOOR WELDED TO FRONT AND REAR OF ROLL CAGE MEMBERS. * WEIGHT – MIN WEIGHT IS 2500LBS WITH DRIVER AFTER RACE. NO TOLERANCE.
* WHEELS – WHEEL WIDTH MUST NO EXCEED EIGHT IN. NO ALUMINUM WHEELS. BEAD LOCKS ALLOWED ON RIGHT REAR ONLY. WHEEL DISCS( MUD PLUGS) ALLOWED BUT MUST BE BOLTED OR WELDED OR FOAM TYPE. NO DZUS FASTENERS. * TIRES – IMCA AMERICAN RACER OR HOOSIER IMCA MOD TIRES. MAX TIRE WIDTH OF NINE INCHES MOUNTED ON A CONVENTIONAL ONE PIECE STEEL WHEEL WITH A MAXIMUM WIDTH OF EIGHT INCHES. TIRES MAYBE REGROOVED * DIFFERENTIAL/REAR END – ANY PASSENGER CAR TYPE OR TRUCK REAR END MAY BE USED. NO ALUMINUM. NO QUICK CHANGE DEVICES ALLOWED. FLOATER REAR ENDS ARE ALLOWED.
* BRAKES – DISC OR DRUM BRAKES MAY BE USED FRONT AND REAR. NO ALUMINUM DISC OR BRAKE CALIPERS ALLOWED. BRAKES MUST BE OPERATIONAL ON ALL FOUR WHEELS AND MUST LOCK UP ALL FOUR WHEELS DURING INSPECTION. * FUEL SYSTEMS – GAS ONLY. NO OXYGEN BEARING ADDITIVES. NO PRESSURIZED FUEL SYSTEMS. FUEL CELLS MANDATORY. FUEL CELLS MUST BE ENCASED IN AN APPROVED METAL CONTAINER OF RAILS AS FAR FORWARD AS POSSIBLE AND USING FOUR 2 IN BYE 1/8 IN METAL STRAPS. TWO EACH DIRECTION. BUMPER MUST BE EQUIPPED WITH A DRAG LOOP EXTENDING BELOW BOTTOM OF THE CELL. FUEL CELLS MUST NOT EXTEND BELOW THE REAR END HOUSING. 32 GAL MAX. NO ELECTRIC FUELS PUMPS.
* BUMPERS – BUMPERS MUST BE USED FRONT AND REAR. FRONT BUMPER MUST BE MOUNTED ON FRAME END AND BE OF A SEMICIRCLE CONFIGURATION WITH THE BOTTOM LOOP PARALLEL TO THE GROUND. FRONT BUMPER MUST BE 10 IN HIGH FROM BOTTOM BAR TO TOP OF TOP BAR. MATERIAL MUST BE ONE AND ONE QUARTER IN MIN. 2 IN MAX O.D . STEEL PIPE. REAR BUMPERS MAY BE CONSTRUCTED OF POPE, SQUARE TUBING, BUT MUST NOT HAVE SHARP EDGES. REAR BUMPERS AND NERF BARS MUST NOT EXTEND BEYOND WIDTH OF REAR TIRE. BUMPERS MUST BE ABLE TO SUPPORT CAR WHEN LIFTED BYE WRECKER. SEAT AND SEAT BELTS – RACING SEAT MANDATORY. ALL CARS MUST BE EQUIPPED WITH AN APPROVED QUICK RELEASE TYPE SEAT BELT AND SHOULDER HARNESS SECURELY FASTENENED TO FRAME AND ROLL CAGE. SEAT BELT MATERIAL SHOULD BE AT LEAST 3IN WIDE AND CAN NOT BE OLDER THAN 2 YEARS. SEAT AND STEERING WHEEL MAY BE LOCATED TO SUIT DRIVERS TASTE BUT MUST BE KEPT ON LEFT SIDE OF CAR. NO CENTER STEER. * ENGINE – MUST USE OEM CAST IRON, AMERICAN MAKE V-8 ENGINES ONLY. ALL ENGINES MUST BE ABLE TO BE USED IN CONVENTIONAL PASSENGER CAR WITHOUT ALTERATIONS. EXTERNAL ENGINES CASTING AND THREADED HOLES CANNOT BE ALTERED. NO ALUMINUM, C.I., FORD 360 C.I., CHRYSLER 370 C.I., NO TOLERANCES. NO 400 OR LARGER C.I. PARTS ALLOWED. NO ALUMINUM VALVE TRAIN PARTS ALLOWED. STEEL STAMPED ROCKER ARMS ONLY. SMALL DIAMETER VALVE SPRINGS ONLY. GENERAL MOTORS, MUST BE 3.48 IN STROKE AND 4.060 IN MAX BORE COMPONENT GUIDELINES MUST USE ON OF FOLLOWING BLOCKS, 3892657, 3914678, 3932388, 3932386, 3956618, 397000, 397006, 397010, 397014, 10066033, 10066036,14010207, 14010209, 14010287, 14016376, 14016379. MUST USE ONE OF THE FOLLOWING UNALTERED OEM CYLINDER HEADS 330862, 333882, 3876487, 3932441, 3951598, 3970126, 3973493, 3986336, 3998920, 3998993, 3998997. MAX 2.02 IN INTAKE VALVES AND 1.60 IN EXHAUST VALVES. STUDS MAY BE PINNED OR USE ON SHOULDERED SCREW IN TYPE. MAY USE STAMPED STEEL ROLLER TIP ROCKER ARMS AND POLY HEADS. FLAT TOP OR DISHED PISTONS ONLY. MUST USE FLAT TAPPET CAM AND LIFTERS. NO MUSHROOM LIFTERS. CANNOT ALTER LIFTER BORES. MAY USE OIL RESTRICTORS. NO VORTEC OR BOWTIE HEADS. OEM DIAMETER SPRINGS MUST MATCH HEADS. ANY LENGTH PUSH RODS ALLOWED. MAY RUN 200CC RUNNER DART HEADS OR WORLD PRODUCT 200CC RUNNER. DART # 10320010 – WORLD PRODUCT # 011250 FORD: STOCK CAST IRON BLOCKS 260, 289, 302, 351. MAX 360 CI. ANY FORD CAST IRON OEM PRODUCTION CYLINDER HEAD WITH IN LINE VALVES (NO CANTED VALVES) AND WITH VALVES NO LARGER THAN 2.04 IN INTAKE AND 1.70IN EXHAUST. NO SVO PORTING, POLISHING, OR ALTERATIONS TO HEADS OF ANY KIND. FLAT MILLING ALLOWED. GUIDE STAMPED STEEL. OEM STYLE, OR STAMPED STEEL ROLLER TIP STUD MOUNTED ( .375IN MAX) ROCKER ARMS ONLY. ANY LENGTH PUSH RODS ALLOWED. OEM DIAMETER SPRINGS MUST MATCH HEADS. WORLD PRODUCT HEAD # 053040 CHRYSLER: STOCK CAST IRON BLOCKS 273, 318, 340, 360. MAX 370 CI. FLAT TOP OR DISHED PISTONS ONLY. ANY OEM FACTORY PRODUCTION CHRYSLER HEADS ALLOWED WITH INLINE VALVES (NO CANTED VALVES) NO LARGER THAN 2.04 IN INTAKE AND 1.70IN EXHAUST. NO PORTING, POLISHING, OR ALTERATIONS TO HEADS OF ANY KINDS, FLAT MILLING ALLOWED. NO W-2 OR AFTERMARKET HEADS ALLOWED. CHRYSLER MAU USE OEM ROCKER ARM BARS. OEM DIAMETER SPRINGS MUST MATCH HEADS. ANY LENGTH PUSH RODS ALLOWED. TRACK HAS OPTION TO ENFORCE THESE RESTRICTIONS WITH A CI PUMP GAUGE, OR BY VISUALLY CHECKING PARTS AND PART NUMBERS DISQUALIFICATION AND LOSS OF POINTS IF FOUND ILLEGAL. * ENGINE LOCATION – REAR OF ENGINE (BELLHOUSING FLANGE) MUST BE AT LEAST 72IN FORWARD FROM THE CENTERLINE FO THE REAR AXLE. THE CENTER OF THE CRANKSHAFT MUST BE WITHIN 2 AND 1/2IN OF CENTER LINE OF BALL JOINTS.
* FRONT SUSPENSION- FRONT SUSPENSION MUST MATCH FRAME AND BE IN STOCK LOCATION. PARTS MUST BE REPLACEABLE FROM STOCK OEM TYPE PARTS FROM SAME TYPE SUSPENSION EXCEPT UPPER A-FRAME AND A FRAME MOUNT. TUBE TYPE UPPER A FRAME MAY BE USED. FABRICATED AFRAME MOUNT MAY BE USED BUT MUST BE IN STOCK LOCATION. LOWER A FRAME CANNOT BE ALTERED. STOCK PASSENGER CAR SPINDLES ONLY. NO FABRICATED SPINDLES. ADJUSTABLE STRUT BARS MAY BE USED ON FRONT END ONLY. NO COIL OVER SHOCKS ALLOWED EITHER FRONT OR REAR. ONE SHOCK PER WHEEL. STEERING BOX MUST BE STOCK OEM TYPE AND BE IN STOCK LOCATION. NO RACK AND PINION STEERING. NO CENTER STEERING. ADJUSTABLE SWAY BARS ALLOWED.
* REAR SUSPENSION – 2 OPTIONS: AFTERMARKET 3 LINK DESIGN OR MULTI LEAF SPRING DESIGN. AL COMPONENTS MUST BE STEEL. ALL MOUNTS AND BRACKETS MUST BE WELDED OR BOLTED SOLID. A: 3 LINK DESIGN REQUIREMENTS: MUST USE MIN 19IN LONG LOWER CONTROL ARMS. MUST USE ONE UPPER CONTROL ARM, SOLID TUBE ONLY. ( NO PULL BAR SPRING OR BISCUIT ASSEMBLY). LOCATED AT TOP CENTER OF REAR END HOUSING AND REMAIN CENTERED ON HOUSING OVER DRIVE SHAFT. MAY USE MIN. 19IN LONG PANHARD BAR LOCATED BEHIND REAR END HOUSING OR MIN 10 IN LONG JBAR MOUNTED TO A STEEL PINION BRACKET. MEASUREMENTS ARE FROM CENTER OF HEIM JOINT TO CENTER OF HEIM JOINT. MAY MOUNT REAR SPRING DIRECTLY OVER AXLE HOUSING OR USE COIL OVER HOUSING. NO BIRD CAGES OR FLOATING MOUNTS ALLOWED. MUST USE STEEL UPPER WEIGHT JACK IF SPRING ARE MOUNTED VER AXLE HOUSING. B: MULTI LEAF SPRING DESIGN REQUIREMENTS: MUST USE STEEL MULTI LEAF SPRINGS WITH NO ADDITIONAL SUSPENSION COMPONENTS BESIDES ONE SHOCK PER WHEEL. ADJUSTABLE ALUMINUM LOWERING BLOCKS ALLOWED.
* REAR END – ANY STEEL APPROVED OEM PASSENGER CAR OR TRUCK NO CAMBERED REAR END ALLOWED, MUST BE CENTERED IN CHASSIS. ALL COMPONENTS MUST BE STEEL, EXCEPT LOWERING BLOCKS. AXLE CAP, AND DRIVE FLANGE. SAFETY HUBS ( FLOATER) ALLOWED. NO QUICK CHANGE DEVICES. INSPECTION HOLE IN HOUSING REQUIRED. MINI SPOOLS ONLY. RING GEAR CENTER SECTION AND YOKE CANT BE LIGHTENENED. SOLID STEEL AXLES AND ONE PEICE DRIVE FLANGES ONLY.
* CARB – STOCK HOLLY 4412 500 CFM CARB ONLY. NO MODIFICATIONS. CHOKE HORN MUST BE INTACT. MAY REMOVE CHOKE BUTTERFLY. MUST USE EDLEBROCK PERFORMER 4BBL. INTAKE MANIFOLD. MUST USE MR. GASKET PART NO. 1933. MOROSO PART NO. 64966 OR HVH PAR NO. 4412-2 CARB ADAPTOR. (CHANGES MADE IN ATTEMPT TO EQUALIZE DIFFERENCE BETWEEN GM, FORD, AND CHRYSLER MOTORS.
* OIL PANS- EXTRA CAPACITY OIL PANS ARE PERMITTED. NO DRY SUMPS ALLOWED. OIL PUMP MUST MOUNT IN STOCK POSITION.
* STARTER – ENGINE MUST HAVE WORKING STARTER AND MUST BE CAPABLE OF STARTING CAR ON DEMAND
* TRANSMISSION/DRIVE SHAFT: ALL FORWARD AND REVERSE GEARS MUST BE OPERATIONAL, PLUS A NEUTRAL POSITION. WITH ENGINE RUNNING AND CAR IN STILL POSITION DRIVER MUST BE ABLE TO ENGAGE CAR IN GEAR AND MOVE FORWARD THEN BACKWARD. ONLY OEM PRODUCTION TRANSMISSIONS ALLOWED. NO IN AND OUT BOXES OR QUICK CHANGE DEVISES ALLOWED. FUNCTIONING SHIFT LEVERS MUST BE IN OEM LOCATION. 1 STEEL OR ALUMINUM OEM STYLE SIZE FLYWHEEL OR STEEL OEM STYLE FLEXPLATE ALLOWED, MUST BE BOLTED DIRECTLY TO END OF CRANKSHAFT. A) AUTOMATIC: MUST BE UNALTERED 2 OR 3 SPEED, OEM PRODUCTION CASE WITH A FUNCTIONING STOCK APPEARING PUMP. MUST HAVE AN APPROVED SCATTER SHIELD CONSTRUCTED OF .125IN BY 3 IN STEEL, 270 DEGREES AROUND TOP OF FLEXPLATE. SPLINED DRIVE FLANGE COUPLER WITH INTERNAL PRESSURE RELIEF DEVICE GATE VALVE OR TORQUE CONVERTER(10IN MIN) ONLY. HYDRAULIC LINES MAY NO EXTEND IN TO COCKPIT. B) MANUAL: MUST BE UNALTERED 3 OR 4 SPEED OEM PRODUCTION CASE AND HAVE A WORKING 10.5 IN MIN. DIAMETER STEEL SINGLE DISC CLUTCH AND PRESSURE PLATE BOLTED DIRECTLY TO FLYWHEEL. THESE COMPONENTS MUST ROTATE, CONSISTENT WITH ENGINE RPM, WHILE CAR IN IN ANY GEAR. MUST USE EXPLOSION PROOF STEEL BELLHOUSING WITH ONE HOLE FOR THROW OUT BEARING LEVER OR HOSE MUST BE 270 DEGREES AROUND TOP OF CLUTCH AND FLYWHEEL AREA.
* DRIVE SHAFT – MIN. 2IN DIAMETER, WHITE STEEL DRIVE SHAFT. STEEL SLIP-YOKES ONLY 360 DEGREE DRIVE SHAFT LOOP REQUIRED AND MUST BE CONSTRUCTED OF AT LEAST .25IN BY 2IN STEEL OR ONE IN TUBING MOUNTED 6 IN BACK FROM U JOINT.
* BATTERY- ALL BATTERIES MUST BE MOUNTED IN A SAFE MANNER
* HELMETS AND FIRE SUITS – HELMETS ARE REQUIRED AND MUST BE WORN AT ALL TIMES CAR IS ON TRACK. ALL DRIVERS MUST WEAR FIRE SUITS OF A FLAME RETARDANT NATURE. 2 PIECE SUITS ARE ALLOWED. FIRE RESISTANT GLOVESS ARE MANDATORY. FIRE RESISTANT BOOTS ARE HIGHLY RECOMMENDED. * EXHAUST – ANY COLLECTOR TYPE HEADER ALLOWED. EXHAUST MST BE DIRECTED AWAY FROM AREAS OF POSSIBLE FUEL SPILLAGE. NO ZOOMIES * KILL SWITCH, FIRE EXTINGUISHER, WINDOW NET – A KILL SWITCH IS REQUIRED WITHIN EASY REACH OF DRIVER. THIS SWITCH MUST BE CLEARLY MARKED OFF AND ON. WEIGHTS AND/ OR LOOSE OBJECTS ARE NOT ALLOWED IN DRIVERS COMPARTMENT. ALL CARS MUST BE EQUIPPED WITH QUICK RELEASE TYPE WINDOW NET ON DRIVERS DOOR. NO REAR VIEW MIRRORS OF ANY KIND RADIO COMMUNICATIONS OR SOUND EQUIPMENT OF ANY KIND. * GAUGES/ELECTRONICS- 12 VOLT IGNITION SYSTEMS ONLY. HEI DISTRIBUTOR ONLY. OEM FIRING ORDER CANNOT BE CHANGED. IGNITION ROTOR CAP COIL AND MODULE MUST REMAIN OEM APPEARING. NO IGNITION BOXES, REMOTE COIL OR ACCESSORIES. ALL WIRING MUST BE VISIBLE FOR INSPECTION. ONLY GAUGES ALLOWED ARE ANALOG OIL PRESSURE AND WATER TEMP. AND ANALOG TACHOMETER (MEMORY RECALL ALLOWED) NO ELECTRONIC TRACTION CONTROL ALLOWED