2008 OCFS Pure Stock Rules


This Class is for the Hobby/Entry Level Driver and is not intended to be a high dollar car division. If you desire to spend a lot of money on a car, PLEASE consider building or purchasing a PRO STOCK, SPORTSMAN, OR MODIFIED CAR. These rules are for the safety of all and standardized fairness in the pure stock division and are non-negotiable.

1. ALL DRIVERS must be at least 16 years old. Any driver under 18 years of age must have on file at the speedway, a release form SIGNED BY A PARENT OR LEGAL GUARDIAN and a copy of his / her birth certificate prior to their first race.
2. A fire extinguisher capable of putting out fuel and oil fires will be on hand in the car's pit area (not in the car) are mandatory. The extinguisher will be of the class B, C, or B/C type only. No air pressurized, refillable, water Class A type extinguishers will be accepted for the purpose of extinguishing fires in the pit area.
3. Cars are subject to inspection and re-inspection at any time during the season to ensure compliance with these rules. Especially following major damage from wrecks.
4. Tech Inspectors and Track Officials reserve the right to perform an in depth technical inspection on any car they feel is not in compliance with these rules no matter what position the car finished in the event.
5. Any car found not in compliance with these rules EXCEPT THOSE RULES CONCERNING THE PERSONAL SAFETY OF ANY AND ALL will be allowed to participate in that weeks event but will automatically be disqualified from receiving prize money and points for that event, and will not be eligible to participate in future events until the infractions are corrected.
6. WHEELBASE - Stock OEM measurements for the year, make, and model. No station wagons, convertibles, 4 wheel drives, no trucks and front wheel drives.
7. DOORS - MUST be welded or bolded shut, NO CHAINS ACCEPTED.
8. ALL GLASS must be removed. Windscreen will be fabricated from heavy steel wire screening with square opening of ½" to ¾". One support bar will run from roll cage down to dash for support and screen will cover the entire original windshield opening. Window nets are mandatory and must be able to easily be opened from both inside by driver or outside by safety personnel.
9. STOCK Appearance - Fenders and rear wheel wells will not be cut away or modified; front inner wheel wells may be removed. All chrome and painted trim will be removed. No sharp or jagged edges and no rear view mirrors. Passenger side and rear area of drivers area will not be sheeted over, stock OEM stamped steel only. All holes (machined, cut or rust) will be covered and sealed in firewall, floor pans, and trunk bulkhead to prevent fire and/or hot liquids from entering driver's area especially where the fuel line passes through the trunk bulkhead and firewall. Cars that do not have bulkhead between the trunk and drivers area will have to fabricate one to isolate the two areas. The only exception will be the hole for the throttle linkage passing through the firewall. Exterior openings may be covered i.e headlights, side markers, and tail light openings. 4 retaining pins will secure the hood and 4 pins for trunk lid unless original hinges are used in which case 2 pins for the door and 2 for the trunk lid will suffice. Bumpers will be stock and ends will be covered and attached to the body sheet metal to prevent hooking. No exterior rub rails permitted on sides of bodies.
10.
A Reinforced wheel is required on the right front. Original stock rims will have a spot welded to the plate on the inside of the wheel. All wheels will be steel (NO ALUMINUM) and 1" lug nuts are mandatory on all four wheels. Four wheels must be identical on all corners. MINIMUM WIDTH 7" MAXIMUM WIDTH 8" No tolerance allowed. TIRE will be street tread only with a maximum 8" tread width. NO snow, mud, studded light truck directional (Hoosier, McCreary, Towel City, etc), or retread tires. Radial tires are highly recommended. NO OFFSET WHEELS ALLOWED. All wheels will be measured from outer bead radius to center bolt pattern. 7" wheel measurement not to exceed 3 ¾", 8" wheel measurement not to exceed 4 ¼"
11. FUEL CELL - Max 22 gal. Capacity. Cell will be centered in trunk and if trunk floor is removed will not extend below the frame rails behind the rear axle. The fuel cell will be secured with a minimum of two 1" X 1/8" flat steel straps secured by 3/8" bolts. A catch can is highly recommended. Fuel lines will be made of steel tubing or steel braided hose from fuel cell to carburetor through the center of drivers area with a fuel shut off valve painted a bright color (red, yellow, orange or white) located next to the drivers seat . OEM rubber fuel hose and OEM fuel tanks are not allowed! A one-way check valve will be installed in the event of a roll over.
12. FUEL - Pump fuel with a maximum octane rating of 93. No leaded racing fuel allowed. No additives or boosters permitted. This will strictly be enforced.
13. ENGINES/INTAKE MANIFOLD - V-8 engines only. 350 General Motors, 351 Ford, 360 Chrysler. Normally aspirated engines only. Intake manifold MUST remain stock, cast iron passenger car 2 barrel only.
14. AIR CLEANER - Air cleaner may be OEM or after market. After market will be Mr. Gasket part #4339 with Mr. Gasket adaptor #6406. (No hi-rise, no power enhancing, no diffusers, no reflectors, no hats, NO MODIFICATIONS OF ANY KIND). An air cleaner element no higher than 3 ¼" (after market reusable element allowed)
15. CABURETORS - stock two barrel carburetors only. Maximum throttle bore 1- 11/16" and maximum venturi bore of 1 ¼". OEM replacement parts only. No speed parts. No race type carburetors. NO boring or polishing of throttle or venturi bores allowed! NO modification of throttle shaft, butterfly screws, or internal parts allowed. Choke plate and choke shaft may be removed.
16. FUEL PUMPS must be stock OEM stamped steel bowl type pumps only. Fittings are available to adapt steel braided fuel hose to them from several sources.
17. RADIATORS must remain in stock location, no aluminum radiators. A catch can for the radiator overflow is mandatory.
18. CRANKSHAFT must be OEM stock for the type of engine, no lighting or boring allowed.
19. PISTONS must be stock OEM cast or cast replacement, Chevy pistons may be flat. Top 2 or 4 valve relief types, no pop up's allowed. Max cylinder bore allowed is .40 over. Stock OEM rods, no matching allowed.
20. CYLINDER HEADS must be stock OEM cast iron only, NO BOWTIE, DART, VORTEX, OR ALUMINUM HEADS!!! Heads may not be ported and polished in any way. Head studs are not allowed.
Max Intake Max Exhaust
Chevrolet 1.94" 1.50"
Ford 1.94" 1.60"
Chry 1.88" 1.60"
21. CAMSHAFT must be stock hydraulic lifter type only. Stock lift and duration will be maintained. Nor roller cams or lifters. No solid lifters. Camshaft lift will be measured at the valve. Maximum lift will not exceed 0.480.
22. ROCKER ARMS/ROCKER STUDS - Long slot rockers are allowed as long as the stock rocker lift and duration is not affected. Rocker arm studs may be pinned. No screw-in studs allowed. Rocker arm studs bosses will not be machined.
23. IGNITION - Only Stock OEM breaker point and HEI (Electronic Ignition) distributors with OEM coils. No after market distributors or coils permitted. Ignition and battery switches will be mounted in the center of the dash so safety personnel can easily access them from either side of the car. Indicator lights for these switches are highly recommended. Stock ignition switches in the steering column will be removed completely to prevent inadvertent locking of the steering column. No car with column type switch will be permitted to run in any event during the season.
24. THROTTLE LINKAGE may be of the solid rod type. No throttle cables are allowed for any event. Dual throttle springs are mandatory.
25. EXHAUST MANIFOLD may be OEM cast iron, NO CENTER DUMP, RAM HORN or HEADERS are allowed, no porting and polishing or internal coating allowed.
26. EXHAUST - Single or dual exhaust is allowed, only stock or California turbo mufflers with rev baffles. Exhaust must exit behind the doors, 2 ½" pipe outside diameter is the maximum allowed. Welding of joints is highly recommended to prevent muffler falling out if the car bottoms out.
27. BATTERY - Must remain in the engine compartment sealed from driver's compartment and securely fastened to prevent contact with metal parts and damage in the event of a roll over or impact. Battery cut-off is MANDATORY. Electrical cut-off switch to cut battery hot wire circuit must be mounted to the right of center on the dash in clear view of safety crew.
28. CHARGING SYSTEM - must be maintained in a functional state to allow car to be self-starting . Any car that will not start from line up on its own will be placed at the rear of the field no matter where handicappers place car in field.
29. ROLL CAGE - A MANDATORY 6 point roll cage must be used to surround the driver and must be constructed of 1 ½" outside diameter steel tubing with a 1/8" wall thickness. Welding of joints must be continuous around the entire joint, no partial beads or spot welding. Welding will be of good quality, excessive slag and overheating of steel (burn through) will be cause for rejection. The up rights must be mounted over on the left and right sides of the frame with upright in front and one behind the driver on each side of the frame. They must be securely welded to the flat horizontal portion of the frame not the kick ups. The four bars joining the uprights must be at least two inches above the helmet height of the driver when strapped into the car. There will be at least 3 horizontal bars on both sides of the car connecting the main uprights; these horizontal bars must have at least one set vertical supports centered between the main uprights to tie the bars together. A diagonal bar from the top left bar down to the top horizontal bar in the driver's door is highly recommended. A horizontal bar at dash height must connect the front uprights. The rear uprights must be connected from the top of the left rear upright down to the bottom of the right rear upright. Any joint between two or more must be gusseted with at least 1/8" steel material for added strength. Flush grinding of welds is not permitted. Threaded pipe, angle iron, pipe fittings, lap weld pipe , soft metals such as aluminum, and channel iron will not be used. Any bars running through the engine and trunk compartments will be completely within the body panels of the car. A Front hoop to protect the radiator may be used but will be at least 4" behind front body parts to prevent it being used as a push bar. Two (2) additional horizontal bars behind the fuel cell to provide crush protection are highly recommended. One (1) bar in this location is mandatory.
30. PADDING - Any cage bars within 18" of the driver's body, extended arms, legs and head will be padded. The steering wheel center will also be padded.
31. ALUMINUM RACING SEATS are mandatory. No fiberglass seats. Seats must be securely fastened with 6 bolts, 4 on the bottom and 2 on the back, to the frame and roll cage.
32. ALL drivers must wear a 2000 or newer Snell approved helmet (no motocross helmets)
33. Fire suit, one piece is highly recommended. Fire retardant underwear, gloves, and racing shoes are highly recommended.
34. SEAT BELTS AND HARNESS - All cars must be equipped with a 5-point seat belts to SFI 16.1 specifications. Belts older than 36 months (from the date of manufacture) will not be permitted. All belts must be securely fastened to the frame or cage. Bolts may not be inserted through the webbing for mounting. Seat belt webbing that comes into contact with any sharp or and 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" smooth radius will not require vinyl trim.
35. TRANSMISSIONS - Scatter shields for manual transmissions are mandatory. Flywheel and clutch assemblies will be stock OEM. Automatic transmissions must run Stock OEM Torque Converter and shatter blanket is highly recommended.
36. DRIVE TRAIN - Drive shafts will be steel only and painted gloss white to aid other drivers in seeing it if it should snap and end up on the track, Drive shaft loop will be made of 1/8" thick material at least 2" wide, installed no more than 6 inches behind the front U-joint. DRIVE SHAFT LOOP IS MANDITORY
Rear ends will be stock OEM. Stock tread width will be maintained.
37. SUSPENSION -STOCK PARTS ONLY!!! Coil springs must be matched and OEM. No spacers, Shims, Jacking bolts or adjustments of any type permitted except camber, caster, and toe in. Longer adjustment bolts are allowed on the right front to facilitate camber/caster adjustment, Rear leaf springs will have the same amount of leafs per side.
38. SHOCKS - OEM or aftermarket OEM replacement only, NO performance shocks (carrera, koni,bilstein,pro,afco, ) shocks must be mounted in OEM position, Max price per shock 49.00
39. BRAKES must be OEM or replacement parts that meet OEM specifications. All components will function as designed and vehicle's brakes are subject to inspection at any time for proper operation. Parking brakes are not required. Absolutely no aluminum calipers or lightweight drums or rotors (drilled) will be allowed. No type of adjustable proportioning valves or similar equipment is allowed.
40. TOW HOOKS or easily accessible lifting cables front and rear are mandatory. Car will not be allowed on track without them!!!!
41. CAR NUMBERS must be 2 digits only and will be assigned by Speedway office at time of initial registration (1-99). No 3 digit numbers allowed. If you desire a specific number register early so you are not left out. No duplicate numbers or any letters allowed. Visiting cars from other tracks must be prepared to renumber upon registration and assignment of car number by OCFS officials.
42. WEIGHT- minimum weight of 3200 lbs. If weight is added it must be bolted to frame in trunk and painted white. Corresponding car number must be painted in black.

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