2013 STOCK CAR (STREET STOCK) RULES
No Expressed or Implied Warranty of Safety Shall Result From Publication of or Compliance with these Rules. They are intended as a guide for the conduct of the sport and are in no way a guarantee against injury or death to participants, spectators or others. ALL TRACK PROCEDURE APPLIES.
These rules are taken from the UMP rules with added Mt. Pleasant Speedway Rules. We are hoping to allow racers to race other places and be legal. Your car is subject to approval by the inspector.
- The engine and body must be manufactured by the same company and be within the same manufacturer’s model line when introduced into competition.
- The number 1 spark plug must align itself in a perpendicular line with the center of the upper ball joint for each manufacturer.
- The engine block must be cast iron from an OEM manufacturer. In addition to the factory OEM blocks only the GM Bowtie blocks with the casting numbers of 10051181, 10051182 and 10051183 will be permitted.
- Aluminum engine blocks will not be permitted.
- Cast iron cylinder heads of any make are permitted.
- Aluminum cylinder heads of any origin will not be permitted.
- Roller-tip rocker arms will be permitted.
- Roller Cams of any type will not be permitted. Roller and/or mushroom type lifters will not be permitted.
- Cast iron or Aluminum intake manifolds will be permitted.
- Cast iron or aftermarket exhaust headers will be permitted. The direction of the exhaust flow must exit away from car and the track surface.
- HEI distributors will be permitted. The OEM firing order for the engine must be maintained.
- Racing-type and/or specific racing-type distributors will not be permitted. (No Proform, Accel, Mallory, etc.)
- MSD boxes and/or any other ignition amplifier boxes of any type will not be permitted.
- Conventional or Aluminum radiators will be permitted.
- NO ROLLER MOTORS.
- One 500 CFM 4412 Holley carburetor is required. (2 barrel).
- A (1”) carburetor spacer is allowed
- The original choke tower must remain in its stock position and configuration.
- The choke blade may be removed.
- Any other alterations to the body of the carburetor, internal working mechanisms, venturis, throttle plate and/or any other part and/or component of the carburetor will not be permitted.
- Carburetor jets may be replaced and/or adjusted as an engine tuning method.
- Only mechanical fuel pumps will be permitted.
- NO transverse mounted carburetors (no sideways mounting)
(CARB CLAIM RULE: CARBURETOR CAN BE CLAIMED FOR $125.00. $100.00 TO DRIVER, $25.00 TO POINTS FUND) ONE CLAIM PER DRIVER PER YEAR. TOP 4 MAY BE CLAIMED BY SOMEONE 5TH. ON BACK. (LAPPED CARS CANNOT CLAIM)
- All cars must equipped with an operable started in working condition. (If you must be pushed on to the track, you must go to the rear.
TRANSMISSION & DRIVE LINE
- The transmission must have a minimum of at least two forward gears and one reverse plus neutral position.
- With motor running and car in still position, the transmission must be able to engage the car in gear and the car must be able to move forward, then backward.
- Only OEM production type transmissions will be permitted – two speed, three speed, 4 speed and automatic
- Five speed (or more) transmissions, “in and out” boxes and/or quick change will not be permitted.
- All functioning shift levers must be located in OEM position. The flywheel and/or flexplate must be bolted directly to the end of the crankshaft and the pressure plate must be fastened and/or bolted directly to the flywheel/flexplate.
- Only one (1) flywheel/flexplate will be permitted. All drive line components within the bell housing must rotate consistent with the RPM of the engine while the car is in gear. Only unaltered an unaltered OEM flexplate and/or an OEM replacement will be permitted.
- Any manual type transmission must be in an OEM or OEM replacement case.
- In manual type applications only an external steel and/or aluminum, single or multi-disc clutch inside explosion-proof steel bell housing will be permitted. The bell housing must be a minimum 270 degrees around top of clutch/flywheel area.
- Special purpose, after-market type racing transmission will not be permitted.
- Working clutch must be bolted to flywheel and in bell housing.
- Any automatic type transmission must remain in an OEM or OEM replacement case, with a functioning OEM appearing pump.
- An aluminum OEM bell housing and/or aftermarket explosion-proof aluminum bell housing will be permitted.
- The original OEM bell housing must have an approved scatter shield constructed of minimum 0.125” by 3” steel, 270 degrees around flex plate.
- Torque converter must be in place.
- Must be a minimum two (2) inch diameter and made of magnetic steel.
- Must be painted white and clearly labeled with the car number on the white portion of the driveshaft.
- Only magnetic steel slip-yokes will be permitted.
- A 360 degree drive shaft hoop will be required and must be constructed of at least 0.25” by 2” magnetic steel and/or 1” diameter tubing, mounted 6” behind the front universal joint. A second drive shaft hoop is recommended and must be placed within 12” of the front universal joint.
- Only American manufactured cars and/or full-size “uni-body” type cars will be permitted
- All vehicles must maintain a minimum of 107” wheelbase.
- Altering of stock frame, with the exception of repair to the original specifications, will not be permitted. Repairs that will be acceptable will include patching of holes and/or rusted areas of the frame. Repairs approved at the discretion of track officials.
- The rear frame may be replaced from the rear shock absorber mounts toward the rear of the car.
- Frame may be notched for fuel pump.
- Minimum at all times will be 3,200 lbs.
- All weights must be securely mounted with (2) ½” bolts securing them to the frame in a positive manner. The weights must be painted white with the car number clearly marked on them. All weights must be mounted under the body of the car.
- Loss of weight may be grounds for disqualification.
- Use of mercury will be cause for lifetime suspension.
FUEL CELLS & FUEL:
- Only gasoline type fuels will be permitted.
- The fuel cell must be securely mounted in the rear of the car and secured with straps. It is recommended that the fuel cell be mounted solidly to the rear frame rails of the vehicle in a fabricated manner.
- All fuel cells must be enclosed in a metal container.
- The fuel cell must be a steel container with a minimum of (2) 1” by 1/8” steel straps on each side of the container to mount fuel cell.
- Only gasoline will be permitted. Methanol and/or any other type of fuel and/or any type of fuel additive will not be permitted.
- The body, frame and engine must match the manufacturer. The body, body mounting position and overall appearance must retain all stock OEM dimensions. All glass, chrome and upholstery must be removed from body prior to competition. THE BODY MUST BE MADE FROM MAGNETIC STEEL!
- The top and/or roof may be removed to install the roll cage assembly, but it must be replaced and fastened in its stock OEM location.
- The front windshield opening must be covered with 1/2” x 1/2” and/or 1” x 1/2” wire mesh. It is also recommended that 3 support bars fabricated from magnetic steel tubing, a minimum of 1” diameter and .095” wall thickness be spaced equally in front of the driver and welded to the top roll cage bar and the dash bar of the roll cage in a vertical manner.
- The inner door panels may be altered for the placement of the door bars in the roll cage assembly.
- The inner fender wells may only be cut to allow for tire clearance. Any excessive alterations will not be permitted.
- All bodies must be steel and conform to all OEM stock components. No altering or channeling of body allowed. No wings or air scoops allowed. Floorboard must remain intact and visible. Must be a minimum 1/8” steel. Full firewall between driver and engine compartment and fuel cell/rear compartment. Boxing in of driver’s compartment can be no higher than driveshaft hump.
- Spoilers: maximum 8” tall by 60” wide maximum. Can be aluminum or Lexan.
- The body, including fenders, quarters, hood, roof, decks and doors must be magnetic steel and must remain stock or approved stock in appearance.
- The body must be mounted in its stock OEM location and centered between the wheels. Chopping and/or channeling of the body is not allowed.
- Exposed tubing and/or bracing outside the bodyline of the car will not be allowed.
- Plastic aftermarket front nose and rear tail will be allowed provided that they are approved and stock in appearance for the year, make and model of the car. LATE MODEL type aerodynamic noses will not be permitted.
- Rub/side rails may be attached flush to the body from the fender well to the rear quarter panel.
- A maximum 7” visor/sun shield may be added to the top of the windshield opening. The window openings, front and rear, driver and/or passenger side must retain their stock OEM dimensions.
- Mirrors of any type are not permitted.
- The back of the hood must be sealed off from the driver’s compartment.
- The front bumper must remain stock. No sharp edges. Both sides and ends must be capped. No tube type front bumpers. Bumpers 18″ from ground +/- 1″.
- The rear of the car must be enclosed.
- WRECKER HOOKS ARE MANDITORY: FRONT AND REAR. Both must be accessible. If no wrecker hooks are on the car, the car will be pushed, towed or dragged to the infield until after the racing program is complete. NEITHER THE WRECKER CREWS NOR RACE TRACK WILL BE RESPONSIBLE FOR ANY DAMAGE DONE TO THE CAR.
- All suspension components must remain stock in their OEM mounting locations for the year, make and model of the vehicle with the exception of racing shocks and/or springs that are mounted in stock location.
- The steering shaft may be a collapsible shaft.
- Aftermarket steering wheel and quick release allowed.
- Steering quickening devices are permitted.
- Aftermarket steering components will be permitted. Aftermarket steering components must be similar and/or replacement in type to the OEM applications for the make and model of the vehicle.
- Only stock OEM type bolts in upper ball joints will be permitted. Adjustable and/or truck type ball joints WILL NOT be permitted. Cutting and/or alterations to the frame will not be permitted to accept any other type or style of ball joint.
- Only DIRT car approved Tubular type A-frames, mounted in their stock OEM location will be permitted. The A-frames may be reinforced along the edges by welding round stock. Cutting and/or changing lengths of the A-frame will not be permitted.
- The lower rear trailing arms must remain in their stock OEM length and format, from the original OEM application and measurement system ( English or Metric) and must remain specific to their particular chassis/frame. The lower rear trailing arms must be mounted in the stock location. Additional holes in the frame and/or rear end will not be permitted.
- The upper rear trailing arms may be altered (shortened or lengthened) to obtain the correct pinion angle.
- Aftermarket bushings will be permitted, but the arms must not be altered in any manner. Slots and/or adjustable rod ends will not be permitted.
- Leaf type springs will be permitted. Only stock OEM type magnetic leaf spring(s), stack(s) will be permitted. Single leaf, mono type leaf and /or any type of slider and/or any composite leaf type applications will not be permitted.
- Coil-over applications of any type will not be permitted.
- Aftermarket coil springs will be permitted. The coil spring location may be altered however, the centerline of the axle tube may not be any further forward than the front of the spring or not further back than the rear of the spring.
- Only magnetic steel body, non-adjustable shock absorbers will be permitted.
- Weight jacks will be permitted. Front shocks may be relocated to accommodate front weight jacks.
- Hydraulic ratchet and/or electric weight jacks are not permitted.
- Only stock type OEM brakes will be permitted. Disc brake(s) will be permitted on the rear brake(s) provided that the rear brake caliper(s) match the front brake calipers. Alterations to the rear brake rotors, to fit the rotor to the rear only, will be permitted. All four corners must be in working condition prior to and following the competition. Aftermarket brake pedals will be permitted. Brake bias adjusters and valves will not be permitted. NO BRAKE SHUT OFFS.
- Suspension components that are adjustable within driver compartment of any type will not be permitted.
WHEELS & TIRES:
- A maximum 8” wide steel racing wheel will be permitted. Aluminum and/or magnesium and/or mag type homemade wheels will not be permitted. 1” magnetic steel lug nuts will be permitted on all four corners of the vehicle.
- Hoosier E-Mod tires; compounds, D, H and/or A. Also any 70 series, G or H 60 series tire.
American Racer P245 allowed. No all season snow tires or recaps allowed. MAXIMUM TIRE TREAD WIDTH IS 8 3/4”. Modified American Racer tire 84/8.0-15 or 82/8.0-15 allowed.
- A bead lock will be permitted on the right rear tire only.
- It is the sole responsibility of each competitor for the effectiveness and proper installation, per the manufacturer’s specifications to be adequate for competition at every event. Each competitor is expected to investigate and educate themselves for continuing improvement regarding their own personal safety equipment.
SEATBELT / RESTRAINT SYSTEM:
- It is mandatory that each car be equipped with an SFI 16.5 or SFI 16.1 approved seat belt restraint system until the date of the belt expiration (usually 2 years). It is mandatory that your selt belt restraints are 5-point harness. Seat belt restraint systems shall be installed in accordance with the directions and application of the system supplier or manufacturer.
- Seat belt webbing that comes into contact with any sharp or un-radiused metal edge should be protected from that edge by means of push on grip trim. Seat manufacturers supply seat with trim protecting the webbing from abrasion or cutting under impact conditions and should be used to their specifications.
- It is the responsibility of the driver, not the officials or the promoter to ensure that his/her seat belt restraint system and all components are SFI approved, correctly installed, maintained and properly used.
- WINDOW NET AND NECK COLLARS ARE MANDITORY.
- Each driver will wear a fire resistant uniform meeting the SFI 3.2A/5 specification and display a valid SFI label.
- Each driver should also wear fire resistant accessories the effectively cover the remaining parts of the body. Shoes and gloves should meet the SFI 3.3 specifications and display a valid SFI label.
- It is recommended that an aluminum seat built specifically for the purpose of competition in auto racing events be required.
- High-back Aluminum (stock car style) seats should be securely mounted to the frame as recommended/required by seat manufacturer and chassis manufacturer.
- The seat must be mounted near the stock OEM location of the front seat for the year, make and model of the specific vehicle.
- Head rest (behind the head) should include padding. All areas surrounding the head should have padding.
- A right head net or support is required. Head nets must be equipped with quick release mechanisms.
- The seat must be mounted a minimum of 30” from the center of the rear end, measured at the bottom of the seat.
- Driver should wear a full face helmet, with at least a valid SA2000 or SA2005 Standard Snell and/or a valid SFI 31.1, SFI 31.2 or SFI 31.1 2000 label.
- Head and neck restraints are strongly recommended.
- No sharp or protruding edges in or around the driver compartment, which would impede the driver’s rapid exit from the car.
- Windshield screens with a minimum of .090” screens must be securely fastened.
- An electrical engine shut off switch is required. The switch must be clearly labeled and within reach of the driver.
- A fuel shut off valve is recommended and should be utilized. The valve should be clearly labeled and within reach of the driver. The fuel line must not enter the driver compartment.
- Flame retardant seat, roll bar, knee and steering pads padding is recommended.
- A minimum 4-point competition roll cage is required. The roll cage must be constructed of magnetic steel tubing that is a minimum of 1 1/2” in diameter, with a minimum tubing thickness of .095 (wall thickness).
- A minimum of 3 horizontal door bars are required on each door.
- A minimum of 3 driver protection bars are required in the windshield.
- Front and rear bars that pass through the firewall will be permitted, with 1 kicker bar to the frame.
- A radiator protection bar will be permitted.
- MUST BE LOCATED OUTSIDE THE DRIVER’S COMPARTMENT. Must be able to go on track on its own or go to the rear.
- Working mufflers are mandatory.
- Must be under 100 decibels
- Must be in working order, mounted for easy removal and within reach of the driver. (No tape, clamps, zip ties).
- A. MANDATORY AFTER 2013
IMCA STREET STOCKS WELCOME
WEIGHT 3000 LBS
BRING YOUR RULE BOOK
Tony Vinton will be the inspector and has our permission to give you his phone number to answer ANY of your questions. 231-468-4735