Ministocks

ELIGIBLE MODELS: Any compact car or mini-pickups originally produced with a four-cylinder motor.

CHASSIS: Front firewall, rear firewall on V.W. and floor pan must remain stock. Uni-body may be tied together with tubing only in conjunction with stock uni-body parts. Stock wheelbase for chassis used.

BODY: Stock OEM or aluminum body. All flammable material must be removed. Cutting of inner panels. Doors, hood, trunk lid and forward of front firewall and from front of fender wells back allowed. Stock bumpers or tubing bumpers allowed. ALL BUMPERS SHALL BE INSPECTED FOR SHARP EDGES. Wrecker loops or lift cables required front and rear. Nerf bars allowed but must not extend past tires outside edge. Radiator must be inside frame rails and isolated from driver. Full firewall, minimum .040” metal, must be installed to cover fuel cell and any other open areas. Spoilers allowed, maximum 7” tall and width of rear deck, .090” aluminum. No brackets or braces allowed. Front nosepiece is allowed

ENGINE: Any four-cylinder engine that came as standard equipment in cars eligible. No rotary or twin cams. No super or turbo chargers. No fuel injection. Maximum 2500 cc bored .040” over plus clearance. Stock stroke OEM crankshaft and rods. No lightening of crankshaft or rods allowed. Rods may be polished and shot pinged and micro grinding of crankshaft for reliability are allowed. Race cams and kits allowed (no rollers). OEM heads only. No porting, port matching, polishing, coating or acid porting. Heads may be milled. Oversized valves ok. Bowls may be cut using piloted bowl hog only. Oil pans and pickups may be modified for better lubrication. Headers are optional. Any after market intake manifold with any two-barrel carburetor. Maximum legal rod length is 5.7

RUNNING GEAR: Transmissions may be interchanged between makes. Automatic transmissions must have working torque converter. No aluminum flywheels. Steel flywheels only. Clutch and pressure plate must be stock for make of engine used. Drive shaft must have loop six inches behind front “u” joint. Drive shafts to be painted white. Rear end may be locked and interchanged between makes of cars that are eligible.

SUSPENSION: Stock upper and lower control arms must be used, but may be shortened or lengthened for camber adjustment and top of struts may be moved for adjustment. Shocks and mounts are optional, only one shock per wheel. Struts may be deadened by drilling a hole and draining the fluid and an outboard shock mounted. Strings are optional but must be same style and size as in car, (coils in coils and leafs in leafs) no coil-over, coil-over eliminators. sliders are ok.. Sway bars allowed but adjustable one end only. Jack bolts allowed. Panard bar may be used if OEM for make and model bolted in original location. Wheelbase must remain stock for chassis used.

WHEEL AND TIRE: Steel wheels can be maximum 8” bead to bead. Beadlocks allowed. Any tire allowed

SAFTY – ALL MANDATORY: Seat belts to be single, quick release, 3” seat 2” shoulder straps. Racing seat and belts are to be bolted to roll cage. Nomex or equivalent fire suits, neck brace and gloves. Helmets to be 95 Snell or equivalent. Window nets and fire extinguishers are required. Battery must be securely mounted inside of frame rails and covered if inside driver’s compartment. No mirrors allowed.

FUEL AND FUEL TANK: Gasoline only. Pump gasoline or racing gasoline only No additives may be used. Gasoline is a good electrical insulator and its relative effectiveness is represented by its dielectric constant (dc). Gasoline will be tested with dc meter. A reading not consistent with the brand of gasoline used will initiate a warning. Any reading greater than zero shall be caused for disqualification. Any fuel sample, which fails the first test, shall be retest after cleaning all test equipment. The second test results shall be binding. Fuel cell or plastic boat tank located in trunk inside of frame rails. Maximum size of 12 gallons. Minimum .040” metal firewall between driver and tank.

ROLL BARS – MANDATORY: Roll bars must be complete cage type with at least three side bars on left side, two side bars on right side and at least two vertical bars must be between all side bars. There must be two bars diagonally from the top rear main hoop to the rear frame rails. Front frame section hoops mandatory. All welds must be gusseted. Bars must be minimum 1 1/4” OD steel of minimum .095” wall thickness. Uni-body must have a plate 3/16” X 6” steel installed on floor pan or steel angle 1 ½”X 1 ½”X 1/8” thick installed down sides of drivers compartment before welding cage into place. Paneling may be removed for roll bar installation. The important consideration is that the load be distributed over as large an area as possible.

INTERPRETATION OF ALL RULES WILL BE LEFT TO THE OFFICIALS AND COMMITTEE MEMBERS AS TO THE SPIRIT OF THE RULES.