Rules Mini Stock

2010 Mini Stock Rules

CHECK WEBSITE PERIODICALLY FOR RULE CHANGES AND AMENDMENTS www.swainsbororaceway.com


COMPETING MODELS:


  • Any 4-cylinder American or foreign made production sedan. No sports cars, convertibles, or high performance cars. No fuel injection, turbo, or rotary powered cars. No solid lift cams. No roller cams.

    • BODIES:


  • Body must be stock appearing. May have aftermarket nose and tail piece. Must have factory stock firewalls and floorboard. Can have one bar in front of radiator. Trunk must be sealed from driver’s compartment. No sharp edges on body or bumpers. Must have tow hooks on front and rear. May use aftermarket body, steel or aluminum. Must be stock appearing. Aluminum body must add 50 pounds. May run 4” rear spoiler.

    • SUSPENSION:


  • Stock type suspensions, changing and heating of spring permitted. Stock brackets, shackles, and mounts. Stock shocks in stock location. McPherson Strut cars may have upper plate slotted for caster-camber adjustment. May run screw jacks. Stock, unaltered trailing arms only. No 9 inch rear ends.

    • ENGINES:


  • Engines must be mounted in stock position and cannot be lowered in car. Engines must be original equipment only and are to be strictly stock except for specified alterations. Engines are allowed .060 for bore plus .010 wear. Deck height – piston cannot come out of hole. Any flat top piston is allowed, no poptops. Heads must be factory stock production only, with no porting and polishing permitted. Any hydraulic cam. Three angle valve jobs allowed. Headers are allowed, stock rods and crank. Rods may be polished. Intake valve size 1.740, exhaust valve size 1.500. No race flow valves. No double valve springs. May use good rod bolts. Bowl cut cannot exceed Ύ’’ and must have lip. May run lash caps. No coating of engine parts, except pistons. May strap cam towers and main caps.

    • OPTIONAL EQUIPMENT:


  • Any valve cover, oil pan, engine fan, air filter, timing gear or pulleys allowed.

    • CARBURETOR:


  • factory stock carburetors or stock factory replacement carburetor or any stock track approved 2-barrel carburetor not to exceed 500 CFM. Model 4412 is the only track approved after-market carburetor. No racing carburetor allowed. Optional removal of choke butterfly and shaft. Changing of jets only!!! Intake manifold must be stock. No Weber carburetors. Spacer and Adapter cannot exceed 1’’ under carburetor.

    • FUEL TANK:


  • must be inside of trunk and properly secured with a minimum of 2 straps. Fuel cells highly recommended. Sheet metal must be installed between tank and track. If fuel cell is used, it can hang no lower than frame rails and trunk must be completely enclosed.

    • IGNITION:

  • Must be factory stock; battery operated. Stock distributor with module on side. No two wire distributors.

    • TRANSMISSION:

  • Stock type. Must have forward and reverse. No racing transmission allowed.

    • CLUTCH:

  • Stock flywheel and clutch as supplied by the manufacturer. No aluminum parts. Flywheel must weigh 17lbs. No scalloping flywheel.

    • BRAKES:

  • Stock brake system. Must have 4 wheel operating brakes. May run aftermarket pedals with one master cylinder.

    • FIREWALLS AND FLOOR PAN:


    a. No Alterations. b. All openings in firewalls and floor pan must be sealed. c. Sealed firewall between driver and fuel tank required.

    INTERIOR:


    A. Racing seat recommended. Do not weld seat to frame. Weld on parallel bars so seat can shift with roll cage on impact. B. Roll bar padding recommended.

    ROLL CAGE:


    A. Four-point box type cage is mandatory. B. Three bars in left door are mandatory. C. Two bars in right door are mandatory. D. Four windshield vertical bars are mandatory. E. Roll cage must be 1 ½” OD x .090” steel pipe minimum. F. Two bars maximum to rear of car, but they must go to the rear most part of the frame. G. Two maximum to the front of frame. H. No part of suspension may be attached to these bars.

    SEATBELTS:


    A. No homemade seatbelts accepted. B. Quick release seatbelt 3” wide mandatory. C. Shoulder harness 2” wide mandatory. D. Submarine strap mandatory. E. All equipment will be fastened with no less than 3/8” diameter bolts.

    SAFETY:

    Must have complete fire suit to participate in race.

    WEIGHT:

  • 1lb per cc. 2300lb minimum.

    WHEELS AND TIRES:


    A. 8” steel wheels only
    • B. 8” Hoosier RC-4 C. May run beadlocks on right side.

    ALL RACERS MUST HAVE A 10LB FIRE EXTINGUISHER IN THEIR PIT AREA! THIS IS MANDATORY BY LAW!!!

     

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