Winchester Speedway

Street Stock

1. No high performance parts allowed except as stated.

2. Wheel base 108. min.

3. Stock suspension. May run aftermarket springs, 5 in. A-frame on top side only, top mounts must be in stock location, none adjustable .Lower “A” Frame must be stock for the car.  Leaf spring cars – shackles and blocks only

Engine - Set back, ball joint in line with # 1 plug max

Bore and Stroke

     A. Stock bore - +.060 maximum.

     B. Stroke - stock for CID of engine. Crankshaft may be aftermarket, must be stock appearing, and weigh no less than 48lbs.

     C. Rods:  must be stock length for CID of engine.

     E. Camshaft: 480 lift Hydraulic flat tappet cam only.  

     F. Carburetor- GAS ONLY Claim price $300


     G. Intake: No porting or polishing.

     H. Compression: 180# maximum. Will be checked with all plugs removed and throttle wide open until needle stops.

       I. Heads: Stock heads and S/R heads. Must be stock diameter valves. Small Block Chevy 1.940 intake, 1.500 exhaust. Small block Ford 1.940 intake, 1.600 exhaust. May be aftermarket valves: solid steel only. Valve springs must be stock diameter. No porting, polishing, grinding, etc. May have pinned or screw in studs and guide plates. Roller rockers  

     J. Ignition Hei   No ignition boxes

     K. May run aftermarket oil pans.

  4. Rear End - Locked rear ends only. Any factory type rear end. Must be mounted with stock replacement brackets for the car that it is under. Southwest Speedway or equal. May be floater axle. May use rear disc brakes, calipers and hubs, must be same as factory no alum.   (Example: front GM can be used on rear.) REAREND must be in factory stock position. Mounting points shall be the same as the factory for the type of car that the rear end is being used under. No light weight components allowed in the drive train Top trail arms may be shortened for pinion angle both arms  shall remain same length, factory type bushins only

5. Transmission - straight shift legal. Must have all gears and be produced by manufacturer of car. Automatics must have working torque converter.  Functional torque converter.

6. Clutch, pressure plate, and flywheel must be steel factory type minimum weight of 34lbs with no tolorence. No modifications.  May be aftermarket. 10 ½” minimum diameter clutch. 

7. Shocks –Steel body, no gas shocks. A claim price of $80.00. No rebuildable shocks. Front shocks may be mounted outside of bucket; rear shocks in stock location. Wedge bolts allowed       

8. Brake pedals in stock location from firewall,floorboard mount ok.

9. Wheels - 10in steel wheel max. Bead Lock allowed on right rear and right front.    


10. Tires - No racing or recapped tires. 275 x 60 maximum. No chemicals allowed.

11. Bodies - Must be full bodied cars or truck factory stock appearing  only. Any fabricated body must have all body lines. No flat sides will be allowed.  MUST HAVE FACTORY STEEL TOP, stock appearing nose and tail piece, and rear must be closed in.

Rule Clarification and Amendment:

1. Firewalls- No manufactured complete firewall. All fire walls must be in stock location. Any patching must be 16 gauge metal.

2. Floor board removed beside driver, add 50lbs on right side frame rail.

3. Floor board removed behind driver, add 75lbs in middle of car no more than 12"  behind the driver at frame rail height.

 A. All cars must have factory full floorboard and firewall, front and rear, no custom built floor boards. Patching must be same gauge as custom cock pits, floor board must be exposedmay be boxed in from driver back. weight penaility added for violations.

 B. Spoiler - 8in. rear and sides. Two side spoilers max.

 C. Bumpers - No sharp edges.  

12. Weight - 362 and under 3200 lbs.      .

13. Fuel tanks - A mandatory firewall between driver and fuel tank.

14. Headers - No tri y or special performance headers ,no 180 degree no headers allowed thru firewall $200.claim price

15. Frame section in front of A Frame mount and behind rear suspension mounts may be replaced with tubing due to rust or excessive damage.

16. All glass and flammable parts must be removed.

17. Roll bars - All cars must have a 4 point roll cage. 4 bars on driver’s side, 2 in passenger side (1 ½” minimum OD black pipe.)

18. 1” diameter lug nuts minimum. Must have 5 lug studs and lug nuts per wheel.

19. Safety - Must have working fire extinguisher, driver fire suit, helmet with shield and safety belts.

20. Mufflers are required

21. Track reserves the right to adjust rules to keep racing equal.



2 consecutive wins - must start in rear of heat.

3 consecutive wins - must start in rear of feature.

Updated 12/01/15

Maintained By: