11/15/11 11:11 AM
2012 Pure Stock Rules
ELIGIBLE MODELS: Any 1955 through newer (No front wheel drive cars.), American made standard sedan allowed. No T-tops, sunroofs, convertibles, or jeeps. Pickups ok. Must remain strictly stock.
FUEL: Only passenger car, DOT approved, standard, civilian mini-mart style, gas-station-available, unaltered or enhanced fuels allowed. No racing fuels or aviation fuels allowed. Performance enhancements, supplements, or other additives are strictly forbidden. Fuel suspected of being illegal or altered will be confiscated, points and purse will be adjusted.
ENGINE SPECIFICATION: No internal performance enhancement parts will be tolerated. Must mount in stock location, in stock mounts. No valve covers taller than OEM stamped steel stock. ALl internal engine parts must remain OEM unenhanced stock. Stock stroke only. Engine swapping between makers in not allowed. GM to GM. Ford to Ford. etc... No angle plug heads, roller rockers, gear or belt drive cams, domed pistons, stainless steel valves, valves larger than OEM specifications for a standard passenger car. No screw in or pinned studs. No aluminum heads. Only modern 3 angle valve job, straight cut below the angle, no grinding, bending, gasket matching or porting allowed. 15 inch lbs of vacuum at 1000 RPM. No aluminum intake manifolds. Cast iron, stock, two or four barrel intakes only. No bow tie or high rise intakes allowed. Cast iron stock exhaust with no modifications. No center dump style exhaust. Operational mufflers required. Noise level of 95db at 100 feet must be maintained. Exhaust must exit behind driver and under the car.
CARBURETOR: One stock carburetor. No "double pumpers" or high performance carburetors. No fuel injection, super chargers, or turbochargers. Carburetor adapter may be used to install replacement carburetor on otherwise stock intake manifold. No electric fuel pumps. No factory EGR plates.
ELECTRICAL/BATTERY: No duel distributors. One 12 v battery only and it must be strapped and securely covered behind driver. No after market H.E.I. distributors or spark enhancement boxes. All cars to have battery disconnect (negative) switch located behind driver's seat.
COOLING SYSTEM: No antifreeze allowed in racecars entering fair grounds property. Water only. Only one radiator in stock location. Radiator overflow catch-can, one gallon capacity or more must be permanently installed and operational. Must be mounted in front of firewall. No radiators constructed with plastic sub assemblies.
TRANSMISSION AND REAR END: Stock automatic and manual transmission. Shifter must be stock. Locked rear-ends allowed. It is mandatory that two steel brackets be placed below the drive shaft and fastened to the floor or crossmember of the car to prevent drive shaft from becoming dislodged and dropping to the race track. Chain is okay. All drive shafts must be made of steel and painted white. Operable torque converter. Scatter shield or steel plate over flywheel is mandatory.
BRAKES: Brake pedal must mount in stock location. All four brakes must work in proportion to each other. No brake bias device allowed. No after market type brakes.
ROLLBAR INSTALLATION: Roll cage must be four-point cage welded to the frame or bolted to the floor. Materials must be 1 3/4" x .95" wall maximum pipe or tubing. Must be gusseted, subject to tech approval. No exhaust tubing or galvanized pipe. Rollbar member may attach to the frame or the floor. For floor installation, attach members to a 4" to 6" square plate (3/16 thick) with minimum 7/16th bolts securely mounted to the floor. Driver's compartment bracing must remain inside the driver's compartment and may be installed as a safety feature only and may not reinforce the body or frame. Rollbar installation will be subject to tech inspection. Front hoop and rear kickers allowed. Steel plate on driver's door mandatory.
TRUNK AND HOOD: Trunk and hood to be latched by removable pins. Stock hood hinges are optional. Padding under hood must be removed. Within the trunk area two safety bars may be installed to help protect fuel cell. These bars are intended to add safety and not constructed in a manner to add chassis performance rigidity.
SUSPENSION: No modifying of suspension is allowed. Suspension parts must remain absolutely stock for make and model. No spacers, chains, or other devices allowed to alter stock suspension. Maximum of four shocks, one per wheel. No racing type shocks. No spring jacks, blocked shocks, or reverse shackles allowed. No steering stabilizer shocks allowed. No cutting, heating, or modifications allowed to springs. Springs must be stock origin. Suspension must appear stock and operable. No pinching of shocks to restrict or stop travel.
WHEELS AND TIRES: Maximum wheel width allowed is 8" with a 1/2" variance. DOT 70 or 75 series street tires required. Tires labeled M+S ok as long as they do not have knobby treads. (tires are subject to tech approval) All four tires must be same series. Maximum 235-15. No magnesium, aluminum, or slotted wheels allowed. White spokes okay. One inch lug nut on stock stud okay.
PERSONAL PROTECTION: Five point approved racing harness will consist of competition type 3" lap belt and 2" shoulder harness minimum. Mounting location must be to manufacture's specifications. Neck brace mandatory. Fire resistant suit and Snell sa90 or better helmet must be worn at all times while on the racing surface. Approved eye protection also required. Quick release fabric window net required on inside of driver's side door window. Quick release steering wheel optional. Fire extinguisher is mandatory. Minimum of 2.5 lbs. Located within driver's reach when tightly belted in. Mounted on a steel bracket only.
YDT reserves the right to add weight to any car that proves dominant.