Shelby County Speedway

 TO BE UPDATED FOR 2013

4-CYCLINDER PONY RULES:

BODY:

THIS IS FOR STOCK CARS THAT HAVE A UNIBODY WITH A FULL STOCK FLOOR PAN AND STOCK STEEL BODY.

ANY TWO OR FOUR DOOR DOMESTIC OR FOREIGN CAR OR TRUCK WITH A 90" - 105" WHEEL BASE. MUST HAVE STOCK FIREWALL, IN STOCK LOCATION AND FULL FLOOR PAN OR CHASSIS. WITH NO MORE THAN AN 8" SPOILER. NO TUBE CHASSIS OR JIG FRAMES. DAMAGED SECTIONS OF THE CHASSIS MAY BE REPLACED WITH TUBING IN STOCK LOCATION. MAY RUN SHEET METAL BODY. AFTER MARKET NOSE PEICE AND TAIL PEICES ARE ALLOWED.

NO TUBE CARS.

8" MAX. REAR SPOILERS ALLOWED

MAXIMUM WHEELBASE IS 101 INCHES (+ - 1")

MINIMUM WHEELBASE IS 92 " (+ - 1")

WHEELBASE MUST MATCH BODY

FRONT WHEEL DRIVES ALLOWED

NO REAR ENGINE CARS

NO INDEPENDENT REAR SUSPENSIONS

NO ROTART ENGINES

INTERIOR BODY PANELS AND DASH MAY BE REMOVED

ALL PLASTIC, GLASS, EMBLEMS, ETC. MUST BE REMOVED

ALL EXTERIOR BODY PANELS AND HOOD MUST BE STOCK

FRONT AND REAR BUMPER COVERS ALLOWED, COVERS MUST BE MADE OF RUBBER OR FLEXIBLE PLASTIC MATERIAL

STOCK TYPE BUMPERS ONLY

NO TUBE BUMPERS OF ANY KIND

NO SKID PLATES, BARS, AND PIPES ANYWHERE ON RACECAR.

SUSPENSION:

CASTER AND CAMBER PLATES ALLOWED. SCREW JACKS ALLOWED. ALL SUSPENSION COMPONENTS, SPRINGS, SHOCKS, SWAY BARS ETC.. MUST BE MOUNTED IN STOCK LOCATION. RACING  SPRINGS AND SHOCKS ALLOWED. ONE SHOCK PER WHEEL. NO COIL OVER SHOCKS UNLESS FROM FACTORY.

DIFFERENTIAL MAY BE LOCKED

FUEL:

GAS ONLY

RACING FUEL ALLOWED

FUEL CELL MAY BE RELOCATED TO TRUNK AREA. MUST HAVE ADEQUATE FIREWALL BETWEEN THE DRIVER AND FUEL CELL

STOCK HOLLEY 4412 500 CFM MAX. STOCK FUEL INJECTION ALLOWED. FUEL CELL REQUIRED. ELECTRIC FUEL PUMP MUST HAVE A SAFETY SHUT-OFF.

$200 TO WIN WITH 3 OR MORE CARS

 ENGINE:

ENGINE MUST BE IN STOCK LOCATION

INLINE 4 CYLINDER ENGINES ONLY

ALL ENGINES MUST HAVE FLAT TOP PISTONS AND ENGINE WITH DOME PISTONS WILL NOT BE LEGAL FOR THIS CLASS

MAXIMUM BORE AND STROKE - THIS IS STD. BORE + 0.060

GM 2.5 BORE-4.060 STROKE-3.000 MUST WEIGH 2500 LBS

FORD 2000CC BORE -3.635 STROKE

-3.029 MUST WEIGH 2050 LBS

FORD 2300CC BORE 3.841 STROKE

-3.126 MUST WEIGH 2300 LBS

TOYATO 20R BORE 3.544 STROKE

-3.504 MUST WEIGH 2250 LBS

TOYATO 22R BORE -3.683 STROKE -3.504 MUST WEIGH 2450 LBS

ANY ENGINE NOT LISTED CONSULT THE TECH INSPECTOR

WEIGHTS MUST BE CLEARLY MARKED ON DRIVERS SIDE WINDOW AREA

NO PORTING OR POLISHING OF HEAD OR INTAKE. STOCK INTAKE MANIFOLD ONLY

MULTI - ANGLE VALVE JOB ALLOWED MUST BE MACHINE CUTS ONLY

UNSHROUDING VALVES ALLOWED

NO HAND GRINDING IN BOWL AREA UNDER VALVE SEAT OR COMBUSTION CHAMBER

SINGLE VALVE SPRINGS ONLY. NO BEEHIVE SPRINGS

MUST USE HEAD BOLTS. NO STUDS AND NUTS

NO ADJUSTABLE CAM PULLEY MAY USE A MULTI KEYWAY CAM PULLEY

HEADERS PERMITTED

ANY HYDRAULIC LIFT CAM ALLOWED FOR THE GM 2.5 AND FORD 2300CC

NO CHEATER HYDRAULICS OR MODIFIED LIFTERS OR MODIFIED ROCKER ARMS.

NO HYDRAULIC ROLLERS IN ANY ENGINE OR SOLID LIFT CAMS IN THE 2300 FORD ALLOWED

FORD 2000CC & TOYATO 2DR & 22R SOLID LIFT CAMS ALLOWED, FORD 2000CC & TOYATO 20R & 22R MAY USE ANY LIFT CAM

FORD 2300 STRAPPED CAM TOWERS PERMITTED WITH A 50 LB WEITHT PENALTY

NO ROLLER CAMS OF ANY KIND

MAXIMUM VALVE SIZE:

GM 2.5 INTAKE 1.720 EXH. 1.500

FORD 2000CC INTAKE 1.654 EXH. 1.417

FORD 2300CC INTAKE 1.740 EXH. 1.500

TOYATO 20R INTAKE 1.693 EXH. 1.379

TOYATO 22R INTAKE 1.752 EXH. 1.437

ANY ENGINE NOT LISTED CONSULT TECH INSPECTOR

STOCK DISTRIBUTOR ONLY, NO MSD OR IGNITION BOOSTER OF ANY KIND

AFTERMARKET WATER PUMP AND CRANK PULLEY ALLOWED

MAY USE ONE CARBURETOR SPACER OR ADAPTER 1 INCH TOTAL THICKNESS +  .030 TOLERANCE/NO PART OF SPACER OR ADAPTER MAY ENTER INTAKE PLENUM AND TWO STANDARD GASKETS(MAXIMUM 0.080 INCH THICK, ONE GASKET BETWEEN INTAKE TO SPACER OR ADAPTER AND ONE GASKET BETWEEN SPACER OR ADAPTER TO CARBURETOR

CARBURETOR ANDY MOTORCRAFT OR 350 HOLLEY MAX

NO 500 CFM HOLLEYS

NO FUEL INJECTION

NO ALUMINUM 2000 OR 2300 FORD HEADS

TRANSMISSION AND CLUTCH AND FLYWHEEL:

STOCK OEM TYPE TRANSMISSION ONLY AND MUST HAVE WORKING FORWARD AND REVERSE GEARS

MUST HAVE STOCK TYPE CLUTCH AND PRESSURE PLATE

NO RACING CLUTCHES, RAM COUPLERS OR DIRECT DRIVES

STOCK STEEL FLYWHEEL ONLY, FLYWHEEL MUST WEIGH A MINIMUM OF 16 LBS

NO SCALLOPED FLYWHEELS

TIRES & WHEELS

STEEL WHEELS ONLY MAX 10" WIDTH

BEAD LOCKS ALLOWED. ANY TIRE BRAND IS ALLOWED. RIGHT REAR TIRE MUST BE A 44 OR HARDER. 10" IS THE MAX TIRE WIDTH.

BEAD LOCKS PERMITTED

NO RECAPS

PUSH BARS:  

PUSH BARS FRONT & REAR PERMITTED

FRONT PUSH BAR MUST STAY BEHIND FRONT BUMPER

REAR PUSH BAR MAY BE ATTACHED TO REAR BUMPER

WEIGHT:

THIS IS BASE WEIGHT NOT COUNTING ANY PENALTIES

GM 2.5 MUST WEIGH 2500 LBS

FORD 2000CC MUST WEIGH 2050 LBS

FORD 2300CC MUST WEIGH 2300 LBS

TOYOTA 20R MUST WEIGH 2250 LBS

TOYOTA 22R MUST WEIGH 2450 LBS

ANY ENGINE NOT LISTED CONSULT TECH INSPECTOR

MINIMUM WEITHT FOR PONY CAR IS 2050 LBS

 PLEASE BRING IT TO THE PIT MAN IF YOU HAVE QUESTIONS ABOUT THESE RULES. THEY HAVE CHANGED OVER TIME AND WE WANT TO BE CORRECTED IF NEEDED...