4 CYLINDER - HORNET CLASS RULES:
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The rules set forth herein are designed to provide fair parameters for competition and a high level of safety. The emphasis on keeping this class of cars inexpensive to build as well as providing for the safety and fun of the participants. It is the driver/owner responsibility to ensure his/her car is legal. If there is any questions about rules contact the tech staff.
Non-conforming cars will NOT be allowed to compete except for minor variations.
THE FINAL DECISION OF THE BOD AND THEIR INTERPETATION OF THESE RULES Will BE THE FINAL RULING.
BODY: North American model, stock production car. Must meet North American factory published specifications for year, make and model.
NO truck, rotary engines, convertibles or all-wheel drive. Must have complete factory body and bumper. Or approved replacement.
Factory steel sunroof acceptable but must be welded or bolted in such a way as to ensure the panel does not come loose or free. Glass panels MUST be removed and opening closed in with sheet metal.
T-roof style cars must weld or bolt steel roof panels in such a way as to ensure the panel does not come loose or free. Glass panels must be removed and a metal tube must be welded between the windshield pillar and the door pillar at the top of the door opening, Remaining roof opening must be closed with sheet metal.
All glass {except windshield}, moldings, trim and lights must be removed. NO loose glass/debris to be left in the car {vacuum it out}.
NO gutting of interior sheet metal, except for installation of roll bar. NO added bracing. NO sharp edges.
NO adding of weight to car except by direction of tech. Minimum 1/2" holes may be drilled in the rocker panels by tech to allow for inspection.
INTERIOR: All flammable material must be removed except for the dashboard, steering wheel and pedal assemblies. These are to remain stock for year, make and model.
Under hood and under trunk flammable material must be removed. If equipped with an air bag it must be removed or disabled.
WINDSHIELD: A full windshield is required or screen ok.
FRAME/SUSPENSION: Stock factory frame, suspension and mounting hardware. OEM style replacement parts only.
NO heating,bending or modification of any type is allowed on suspension pieces.
No suspension modifications whatsoever, Must remain stock. Strut braces allowed.
All other caster/camber measurements to remain as set at the factory and must be within the suggested specifications. You MAY NOT use available factory adjustments to exceed the factory suggested specifications.
If found in violation of these measurements by tech, you will not be allowed to race until the necessary corrections have been made and race points earned may be taken away.
Dust boots/covers on shocks and struts must be removed or slotted. This pertains to the covering that protects the telescoping part of the shock/strut. The entire length of the telescoping of the shock/strut must be visible to tech.
NO clamps, adjusters, spacers or chain allowed. NO added bracing allowed.
WHEELS/TIRES/BRAKES: NO bald spots, separating or bald tires. NO tire treatments or softeners.
Mass produced steel or aluminum wheels only.
Wheel offset/backset not to exceed factory specifications for car model.
NO spacers of any kind.
NO broken or missing wheel studs or nuts. NO pound in type wheel weights.
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Must have four wheel working brakes. Must remain factory calipers.
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Removal of hand brake allowed. Absolutely no other alteration of any brake component allowed. GAS TANK/FUEL CELL: If the stock tank is located in front of the rear axle assembly it may remain.
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If the stock tank is behind the rear axle assembly it must be removed and mounted in the trunk/hatch area. (unless 18” protection is provided, See BOD for approval)
A fuel cell may be used in place if the stock gas tank.
Stock tank or fuel cell must be enclosed in a metal box with a ground strap from the filler neck to the body if relocated inside the vehicle.
ENGINE/TRANSMISSION: 4-cylinder engine, maximum 1 6 0 horsepower as originally advertised by the manufacturer.
Engine top of engine to bottom of oil pan, must be stock for year, make and model of car. You must be able to show tech, the engine and head casting numbers to verify that the engine/head combinations are stock for your application. If the engine needs to be replaced with the same engine as originally equipped if available. If a different engine is being swapped in then you must provide tech, with the technical information for both existing engine and the engine you are proposing to swap in. This information will include the car model, engine and head codes, horsepower rating and manifold/injector information provide and decide if the swap will be allowed. Any swap being made MUST have prior tech approval. Any modification from stock must have prior tech approval. ABSOLUTELY no performance enhancing modifications allowed. Cold air intake OK.
On cars equipped with a timing BELT a 2" diameter hole must be cut in the timing belt cover to allow for cam gear inspection. On cars with a timing CHAIN a hole is NOT required but the valve cover/timing cover MUST be removed for inspection when requested by tech.
NO turbo or supercharges.
Transmission must remain stock for year, make and model of car.. NO fuel additives, pump gas only.
EXHAUST: Must exit from beneath the car and behind the driver. Must be equipped with a muffler.
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SAFETY: Minimum single hoop roll bar with cross brace and two down bars is required. ( Tbars may be grandfathered after BOD inspection on cars that previously ran at this track) One end of the down bar to be welded to the top of the roll and the other end of the down bar to be welded to the front face of the rear suspension mounting structure. A four point cage may also be used if approved by tech, and may not be used to stiffen the car. Minimum of two horizontal bars with two vertical support bars on the driver's side, minimum one horizontal bar on the passenger side. Roll bar/cage material is to be a minimum of 1” O.D.X. wall steel tubing. Tubing material only, NO pipe material. Proof of material used may be required and is the responsibility of the driver to provide. Tech reserves the right to drill a min 3/16" hole in the roll bar/cage to verify the material used. NOTE: Before you build check with HORNET tech to be sure you meet the safety requirements. NO cage structure to extend forward of the engine firewall or rearward of the center point of the rear suspension mounting structure. Absolutely no other bracing allowed. Gussets recommended where tubing is welded together. All welds to be of good quality and must be as complete as possible. NO tack welds!!!! If the roll bar/cage is bolted to the floor pan, 4" x 4" x min 1/8" thick steel mounting plates must be used with a corresponding plate under the
floor pan. Minimum of two 1/2" diameter, Grade 5 bolts to be used. Cars built with the upright t-bar
system prior to the 2014 rules implementation will be allowed to continue competing but it is STRONGLY recommended that drivers of these cars update to the new minimum standard.
Must have one drivers door reinforcements, minimum 4" channel and extending as close to 6" ahead of and 6" behind the door opening as possible without entering the wheel well areas. Channel must be bolted with min 1/2" diameter grade 5 bolts and large washers to the "A" pillar {windshield} and the "B" {door latch pillar]. Channel must be mounted on the exterior of the door and each end must be cut at a 45-degree angle. Angled area must be capped with minimum 1 /8" thick steel plate welded to the channel. Top channel must be mounted midway up the door. Lower channel to be mounted with the bottom edge of the channel no lower than the door/rocker seam and no higher than 4" above the door/rocker seam. Passenger door must be chained {min 3/8" chain}.
Doors must be welded, clamped or bolted shut securely.
A fully charged 2 1/2 lbs fire extinguisher mounted within easy reach of the driver is required. Metal style mounts must be bolted or riveted, NO sheet metal screws.
An approved window net is required on the driver's door. The window net must be in good condition, NO frayed, cut, repaired or otherwise modified nets will be allowed. Net must be mounted with minimum 3/8" diameter solid, unthreaded steel rod, no re-bar. Net must be latched at the top {roof} and open downwards. Window net mounts to be welded or bolted. NO hose clamps, rivets or sheet metal screws.
3" wide 5-point race harness MANDATORY. Must be properly positioned and mounted using the factory seat belt bolts or min 1/2" diameter grade 5 or better bolts.
An approved SFl-1 single layer or better fire suit is MANDATORY. Neck braces and D.O.T. or better helmets are required.
PAINT/NUMBERS: Choice of color is at the driver's discretion. Colored cars will have a strip of yellow reflective tape applied {by tech} to aid in visibility.
Doors to remain the color of the body with a min 1 6" high number in a highly contrasting color. NO design or decoration other than the number is allowed on the doors. Roof numbers, if used to be 36" {or as large as roof area allows} high.
NO two-way radio/phone communications between the driver and the pit or the grandstand areas. Violation of any of these rules may result in loss of daily points, trophies, and monies. Serious or continued violations may result in suspension of racing privileges for a period to be determined by Track Executive. Track Officials reserve the right to refuse to allow car to compete if the car is considered unsafe due to excessive rust, structural or accident damage. lineup and direction of racing to be decided by the Track Officials.