CLASS DESCRIPTION: The intent of this 4 Cylinder class is entry level racer. Track phone 607-745-0275

The 4 Cyl. Class is based on mass produced, 4 passenger sub compact cars & pick up trucks with a maximum wheelbase of 104.0”. Front wheel and rear wheel drive cars / trucks allowed.
The cars, trucks are essentially stock with modifications limited to two basic areas – engines and tires/wheels/suspension.
All other components must be O.E.M. or direct replacement except as specifically stated herein. These components may be reinforced or heavy duty, but no further modifications are allowed. II

Minimum Weights:
One (1) pound per cubic centimeter (cc) with a minimum weight of 2050. All weights measured at the completion of
a given event with driver in car. No fuel may be added to reach minimum weight.
Competitive Weight Adjustment: Track officials reserve the right to institute a competitive weight penalty, with weight added to a location to be determined by track officials.
All cars must have minimum weight and cubic centimeters lettered on the hood.
Ballast weight must be lead weight or steel plates mounted to frame by weight ballast clamps. No welding weight to frame allowed. No dumbbells may be used. All ballast weight must be painted white and have car number on it.

Any exhaust system may be used. All exhaust systems must exit outside body shell.

All suspension pivot points must retain stock location and stock track width. Any stabilizer bar may be added or removed in front and/or rear. Bushings may be changed.
Struts, shocks, and springs must be O.E.M. replacement. Strut suspension reinforced top and bottom. Springs may be of various tensions. A-Frames may be strengthened.
No floaters. All drive line and suspension parts, also engine, must be the same as floor pan. 

Must have four (4) wheel hydraulic brakes in good working order. May use proportioning valves.

Wheels and Tires:                                                
Stock steel wheels and aftermarket steel racing wheels permitted. 8" Maximum width, maybe single or double wall and have a 3”/ 4” maximum off set.
NO spacers or spacing allowed between hub and wheel.
8” tread width maximum, racing and DOT tires are permitted. NO studded or winter tires allowed.
Grooving of tires is permitted.
NO wheel plugs/ covers/ or inserts.

No tube frames. Reinforcement of stock frame is permitted. Front and rear sub-frames must be tied together on uni-body cars.

Floor Pan:
Complete floor pan MUST be used. Holes through floor pan must be sealed. Body and floor pan must remain essentially stock.

Transmission / Driveline:
Must be complete transmission. Gearing may be changed. Five speeds may be used. 
Automatic or standard O.E. style transmission. A drive shaft loop must be installed within 6”-12” of the front universal joint to prevent drive shaft dropping in case of breakage.

Must be ENTIRELY gutted. Remove or pad all sharp edges. ALL pedals must remain in stock location.
 A FULL 6 POINT roll cage with headrest constructed of mild steel tubing is MANDATORY. Major tubes MUST be 1 ½ O.D. X .090 wall thickness MINIMUM. The major tubes are all tubes in the six-point cage and the driver’s door bars.
Driver and passenger openings must have three side bars with uprights.
Front firewall must be stock with holes plugged. A 20 gauge metal firewall must be installed behind the driver, extend to the rear window opening, and completely enclose the rear deck. It MUST be securely bolted, riveted, or welded in place.

Interior tinwork:
No cockpit style enclosed tinwork. Right side may have tin flat front to rear up to 12” from the floorboard. 

Steering Column:
May not be lengthened, shortened, or relocated. A collapsible steering column is highly recommended.

Ground Clearance:
MINIMUM ground clearance is 4” measured to the lowest part of the chassis.

Tow Hooks:
All cars must have tow hooks mounted on the front and rear.

NO chopping, channeling, or sectioning. Front inner fenders optional. BODY Overall appearance must be OEM stock to the eye. Full rocker panels must be used. Wheel well openings may have a reasonable radius for tire clearance.  f. Bodies must be complete. Body may not be lowered over floor pan. 
Body must be of same manufacturer as original floor pan. Wheel base of new body must be same as original body within 2 inches. Headlight and tail light openings must be sealed to driver’s compartment.
ALL glass, lights, side body moldings and door latches must be removed. 

A 2” maximum height hood scoop is allowed. Hood scoop must be completely enclosed and be neat in appearance-
No ram air. Hoods must be chained and/or approved hood pins must be used.

Stock windshield must be removed. Windshield area and windshield cavity must be screened in half inch squares recommended. Windshield must have one safety bar and two safety straps one in the center and one 5” from center on each side.

MUST be stock appearing, with ends capped with steel cap and/or brought in flush.  Trucks must add 4” of pipe or other bumper material under the stock bumper location front and rear.

Rub Rails:
Single side rub rails permitted, must NOT extend more than 1” from body. Driver’s side rub rail must be level, passenger side may be tipped town slightly from front to rear to prevent overlap on contact.
 ALL rub rails must be rolled in towards body on end.

Deck/Lids/Rear Hatches:
Must remain stock

 Numbers and Graphics:
Legible numbers must appear at least 12” high in contrasting color and must be on driver and passenger door and on roof. Engine displacement and minimum weight must be painted on hood in 2” letters on driver’s side.  IV.

Normally aspirated, four cylinder, four cycle, single (up to 4-valves per cylinder) or dual overhead cam engines permitted. Engine displacement may be no greater than 2560 ccm. Engine block and cylinder heads must be stock appearing. Engine must match chassis manufacturer.

Carburetor / Fuel Injection:
Any single or 2 barrel carburetor including Holley #4412 OEM. Must run a maximum spacer adapter of 1” including gaskets. No modification of any kind allowed to the carburetor except the removal of the choke plate and shaft.
Box stock only. The jets may be changed as needed. Conventional round type air cleaners only. NO air induction plastic carburetor inserts or other devices to direct air into the intake. All carburetors must remain under the hood.
Throttle area not to exceed 43mm (1 11/16”). Fuel injection allowed stock on fuel injected engines.
Two (2) throttle return springs required.

Intake Manifold:
NO altering of manifolds. The only exception is where it accepts the carburetor or spacer plate.  Fuel injected manifolds must be used on fuel injected systems. Carburetor manifolds used on carburetor systems only.

Battery and Ignition:
Any battery operated ignition. No Magnetos. Battery MUST be located in either the engine compartment in a safe manner or in driver’s compartment. If located in driver’s area, the battery must be completely covered.
 Marine style brackets are recommended. All cars must have a battery disconnect switch, located on the left side of the steering column at the A-pillar.

Cooling System:
Any radiator, fan, or shrouding may be used. Must be mounted within limits of stock location.

Lubrication System:
May be modified. Dry sump systems are not allowed. Oil coolers must be mounted in engine compartment

Fuel Tanks:
Fuel cell recommended, but stock gas tank can remain if it is ahead of the rear axle and double strapped. If stock tank is behind the rear axle then it must be removed. Fuel cell must be mounted in the trunk area in a can and be secured properly 12 gallon maximum. Must have fire wall between drivers compartment n drunk area.

Electric Fuel Pump's:
All cars with electric fuel pump's must have a tether switch connected to the electric fuel pump.

Aluminum or carbon fiber-type composite seats only permitted. If a carbon fiber-type composite seat is used it must meet the SFI 39.2 ratings. Aluminum seats with an FIA and/or SFI 39.2 rating are recommended.
 All seats must be mounted to the frame as required by the seat and chassis manufacturer. Full containment seat(s) are recommended. All areas surrounding the head should have padding. 
The driver’s seat must be securely fastened to the frame and/or cage in six positions with a minimum of six (6) 3/8”-inch bolts, grade 5 or better (4) in the bottom of the seat and two (2) in the back.  All seats must have a minimum of 1/8”-inch magnetic steel plate under and up the back 4”inches and be as wide as the seat. Only single piece high back type seats are permitted. 

Safety and Procedural Rules:
Make sure you read all safety and procedural rules. If you have questions on rules or procedures please ask.
We will add rules as necessary to keep class safe, competitive, and inexpensive and fun.
Raceceiver radio or scanner able to hear race officials on 454.000 is mandatory.