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Mini Stock
Rules for 2003 Season
Horseshoe
Mountain Raceway
This is a 4-cylinder only class for drivers with or without racing experience.
Wheelbase
Minimum of 80", maximum of 104.9"
Measured from center of the bearing in the front wheel to the center of the half-shaft in the rear wheel.
May use cars, station wagons or trucks (no convertibles).
Truck frame and bed body may be cut anywhere in the bed section to reach maximum allowed wheelbase.
The vehicles may be either front or rear-wheel drive. No 4 or all-wheel drive.
The vehicles may be either front or rear-engine.
Exterior
Remove all glass, plastic, lenses, door handles, mirrors, chrome trim, moldings.
All doors must be welded or riveted shut.
Hood and trunk must have at least two (2) pins each for easy, emergency access and fly-off security. Remove main and secondary catches from the hood; remove the lock from the trunk.
Stock body panels. No fiberglass body panels.
Add tow points front and rear. This is a chain welded or bolted to the frame at two points.
Wheel wells may be cut to help eliminate wheel rub.
Maximum 4" spoiler.
Engine
Maximum displacement - 152 cid (2600cc).
Must be 4-cylinder engine.
No intake or exhaust porting.
Must have crank, rods, heads, block and intake manifold that was available from the factory for the engine. Lifters, followers and rockers must remain same style as was available for that engine from the factory.
No factory race or crate motors.
500 cfm maximum carburetor.
Stock distributor.
Mufflers and catalytic converters may be removed.
No fuel injection, turbochargers or superchargers of any
type.
Tires,
Wheels and Studs
Maximum 8" width stock DOT-approved steel wheel.
Maximum 8" width tires.
No mud-only tires. No snow-only tires. DOT-approved street tires only. Tech inspector reserves the right to reject a tire if the tread is deemed to be too aggressive.
Must have 4 (four) working brakes; 1 (one) brake per tire.
Driveline
Safety chain or metal strap bolted or welded to underside of car to loop around the drive shaft to help prevent shaft flyoff.
Transmission must have a working reverse.
Rear axle gears may be changed.
Rear axle may be welded or locked.
No lightened flywheels.
Interior
Remove all carpeting, headliner, rear-seat(s), mirrors and anything else which may be flammable.
Dashboard must be removed if it is a plastic or composite dashboard. Metal dashboards may be left in place.
Rear bulkhead must be covered to maintain a barrier between trunk and driver's compartment.
Stock seats may be used. Racing seat recommended.
All holes in the firewall and floor must be plugged of covered. May have (2) ½" holes in floor pan for drainage.
Must have a 2½ lb fire extinguisher in reach of the driver.
Roll cage
Must be a four-point cage minimum with the end points of the cage securely welded directly to the main vehicle frame rails. If a uni-body chassis, end points of the cage must be welded to a steel plate inside driver compartment and bolted to chassis hard point or another steel plate under the car.
For trucks, must be a six-point cage, with the rear two points coming out the back window and connecting to the frame rails in the bed of the truck.
The cage must be made of minimum 1 3/4"diameter by .095" wall thickness bar.
If using pipe metal for the main bar, weld joints must have a gusset or triangulation. If using one continuous main bar, no gusset or triangulation required.
No tail-pipe bar permitted in roll cage.
Must have a minimum 3 (three) cross bars: two in the roof; one across behind the driver at the middle of the seat. If a dashboard has been removed, a fourth bar must be added in its' place.
Must have at least one (1) diagonal bar from one side top to the other side bottom behind the driver for roll-over protection.
Must have a brace in the foot well made of minimum 1 1/3 inch x .095. Brace should be left of the driver's feet.
Minimum two (2) braces, top to bottom, in front window. Must be ½" shaft or larger.
Driver's door must have a minimum of three (3) door bars with two interconnecting vertical bars between each horizontal bar.
Passenger door must have a minimum of two (2) door bars with two interconnecting vertical bars between each horizontal bar.
All bars that a driver can touch from the driver seat must
be padded.
Driver
Safety
Must race with a fitted, DOT-approved racing, motorcycle or 4-wheeler helmet (no bicycle helmets), neck brace, and eye protection.
Must wear a fire suit. Nomex gloves, racing shoes, and Nomex underwear are recommended.
Must have at least a 5-point racing harness.
Must have a race-approved window net in driver's window.
Must have mesh screen of some type in front window.
Battery
and Fuel Tank
Battery may be secured in the original location under the hood. Battery may be moved into the rear seat area as long as it is secured in a battery box which is secured to the vehicle.
If using a metal box, the battery must be insulated all around.
Must have a battery disconnect switch within reach of the driver. The switch must be able to shut the car off when all other switches are on.
Stock fuel tank must be removed. Must use a fuel dispensing unit, such as a racing cell or marine tank.
No fuel storage units used as tanks.
Tank must be securely mounted in the trunk with straps or bands.
May use mechanical or electric fuel pump with roll-over switch.
Fuel cell is recommended.
No alcohol, av gas or nitrous assist. Pump fuel only.
Suspension
Must use stock suspension pickup points.
No adjustable or coil-over shocks.
One shock per wheel.
No weight jackers. Hold down chains may be used.
No independent suspensions.
Car
Number
Number must be on both driver and passenger doors.
Number must be on roof, facing towards the passenger side of the car.
Number must be at least 18" tall.