MINISTOCK RULES
 

Winchester Speedway

MINI STOCK RULES

1. Body:


A. Compact four cylinder cars allowed.


B. Must be stock appearing.


C. Must have full body, firewall and floor pan. Replacement sheet metal panels OK as long as maintaining stock appearance. No open tail sections.


D. Must have tow hooks, front/rear.


2. Engines:


A. Must match make of car and be in original position and powered by gasoline only.


B. Hydraulic cams and lifters only unless car was OEM solid (Toyotas)


C. Lower end stock only,= .060 allowed. No lightning of crankshafts.Stock replacement or hypereutectic Pistons only. Stock rods only.


D. No high performance parts permitted unless otherwise stated.


E. No roller rocker arms


F. May run aftermarket pulleys, cam and crank.


G. Ignition: Stock ignition only. No MSD.


H. Cranking compression-175 lbs max no tolerance. Will be average of all cylinders.


3. Heads:


A.Stock factory steel head only ,no off road heads. MUST BE AS CAST FROM MFG. NO PORT WORK


B. Valves must be stock diameter .010 tolerance. Lash Caps are Legal


GM.2300cc 1.620-1.375/ 2474cc.1.72-1.50


Ford 2300 1.735-1.50


Nissan 2389c-1.657-1.5 Toyata2366-1.72-1.457


C. Valve Job:Any Machine Cut NO BLENDING MACHINE CUT ONLY


D. Windage trays or aftermarket pan


4. Intake/Carb:


A. Intake- Stock only. No polishing, porting or modifying. No fuel injected intake.


B. Carburetor-


GAS ONLY!! No Oxygenated gas allowed.


500 cfm holley or smaller .1”spacer plate .030 tolerance. Carb must have choke horn and part number. $350 claim price


5. Exhaust - Headers allowed. $300.00.claim price


6. Flywheel/Clutch/Driveshaft:


A. Stock clutch, pressure plate, and flywheel.


B. Flywheel must weigh a minimum of 13 lbs. Surfaced on the clutch side only no scalloped flywheel. Must be a factory flywheel no aftermarket.


C Must have 2” inspection hole in bottom of bellhousing


D. Driveshafts: any


7. Tires/Wheels:


A. Wheels – 8 in.wide max. steel wheel max. Beadlock RR and RF.


B. Tires 8" Max. Width racing tires permitted Add 75 lbs To TTL WEIGHT must durometer 50 or more.


DOT Tire. Black And Round must have 4. No siping, grooving or chemicals.


8. Suspension -.A $70.00 claim price on shocks/ struts. Must be stock length and mount same as factory location Rear axle may be locked. Wedge bolts legal. Top trail arms holes may be drilled or cut for pinion angle.


9. Weight – 1 lb Per CC, Minimum Weight 2000lbs, . Weight Must be displayed on both front fenders.


10. General - Stock parts, stock position.


11. Must have working fire extinguisher, driver fire suit, helmet with shield and must have safety belts. Raceceiver is MANDATORY!!


12. 1” diameter lug nuts minimum.


13. Mufflers or similar type of exhaust sound muffling device is required. Winchester Only.


14.Front wheel drives: No Honda vtec, no turbos, Bore +.060 and stroke must match the engine the car came with. All internals must be stock. Intake in front of throttle body may be changed. Header Ok


ANY TIME IN DOUBT ALWAYS ASK

Updated 1/23/17

Maintained By:

ALL RIGHTS RESERVED BY JP MOTORSPORTS PROMOTIONS