Updated 12/3/2023
Safety:
Safety requirements include but are not limited to the following:
- Driver’s seat:
- An approved full containment seat is mandatory.It is STRONGLY RECOMMENDED that the seat meets FIA and/or SFI specifications. Seat mounting must be per manufacturer’s recommendations. The driver’s left side head rest / helmet surround must extend at least 4” inches forward from the back of the headrest (where the helmet contacts the back of the headrest). All areas surrounding the head should have padding.
- Personal safety equipment:
- Driver must wear helmet, driver suit, minimum five-point harness system, shoulder harness, anti-sub strap and arm restraints, anytime car is started. Flame retardant driver suit, gloves, socks, underwear (unless 3-layer suit is utilized), and shoes are mandatory. Approved racing, full-face helmet is mandatory; a Snell SA 2015 or newer sticker is mandatory.Five-point harness system and arm restraints must be no more than three years old and contain unaltered SFI safety labels. Quick release steering wheel is mandatory.
Car Specifications
Appearance:
Car must maintain conventional sprint car appearance. The number must be prominently displayed on both sides of the fuel cell, both sides of the top wing, and it is highly recommended to have a number on the top of the center section of the top wing.
- Frame:
- Cage support bars are required.
- The left and right-side support bars do not have to be the same.The support bars must be minimum 1.375” diameter X .083” ASTM4130 normalized steel or equivalent material.
- Fuel tank:
- All cars must be equipped with a conventional tail tank and fuel cell/bladder.
- Weight:
- Cars are weighed for the purpose of evaluating car safety. The car must be 1,400 pounds minimum with driver. Any competitor who refuses to have their car weighed when directed to do so will be disqualified, will lose all points and money for the race program.
- Electronic devices and battery-powered devices:
- ALLOWED DEVICES
- Magneto ignition boxesTire Bleeders Distributor ignition batteries Tachometers Raceceivers Timing/scoring transponders Helmet ventilation systems Oil pressure and water temperature digital gauges and warning lights Cameras
- Magneto ignition boxesTire Bleeders Distributor ignition batteries Tachometers Raceceivers Timing/scoring transponders Helmet ventilation systems Oil pressure and water temperature digital gauges and warning lights Cameras
- ILLEGAL DEVICES
- Traction Control Devices
- ALLOWED DEVICES
- Other devices are not allowed unless prior written approval has been given. Unapproved devices will be confiscated. This includes all devices that use any power such as batteries, internal power supplies, wind-up, etc.
- Cockpit adjustable devices:
- Only a top wing slider is allowed.
- Other devices including but not limited to brake bias, shocks, and suspension are not allowed unless prior written approval has been given. Unapproved devices will be confiscated.
ENGINE:
410ci max – No restrictions to the engine.
Mufflers not required.
Wings
- Center foil maximum size of 25 square feet with a maximum width of 60 inches with a one degree plus or minus tolerance. Center foil shall be fully sheathed in aluminum. Vent holes are strictly prohibited. Other than the slider mechanism, no moving parts allowed on or in foil structure. Wing must be fabricated of metal alloys only. No fiberglass, carbon fiber or other similar material may be used in the basic framework of the wing.
- A maximum 2 inches removable wicker bill may be mounted on the rear edge of the center foil. Wicker bill must be 90 degrees to the top of the center foil. Built-in wicker bills or gurney lips will not be permitted. The maximum dimension of wicker bill may change periodically. Any such changes will be issued in writing prior to the event in which the change will be made.
- The 12-inch section located at the rear of the center foil must not have the belly/curl arc out of proportion with the rest of the center foil. The belly/curl arc must span the entire length of the center foil and appear to be a gradual arc with the deepest point no further back than 48 inches from the leading edge. As measured on a 12-inch straight edge, the belly at 6 inches from the rear of the foil may not be deeper than ½ inch. There is zero tolerance on this ½ inch depth. It is suggested that the wing blue print specify 15/32-inch depth, so that if any deflection or movement of the wing occurs, the depth will not exceed the ½ inch specification. (This ½ inch measurement ensures that the belly/curl arc is gradual.)
- The belly/curl arc must start at the radius of the center foil’s leading edge and shall not exceed a depth of 2½ inches. Center foil thickness cannot exceed 9 inches. Center Foil top surface from side to side must remain flat. Center foil must be one-piece construction. No split or bi-wings will be permitted. Wings must be fabricated of metal alloys only. No fiberglass, carbon fiber or other similar material may be used in the basic framework of the wings. Top wing must not extend beyond outside of rear tires.
- Two stationary foils or rudders will be allowed to run the entire length of the underneath portion of the top wing. Maximum height proportions are 1 inch at the front and 3 inches at the rear. Nowhere shall the foil exceed 3 inches in height. The top wing can be cockpit/driver adjustable.
- All sideboard panels must be within an eight-degree plus or minus tolerance.
- Bracing: Side panels may not be supported by braces whose section is not horizontal. All braces or supports shall be oriented thin edge to face the air stream. Only rectangular, round or oval metal braces not exceeding 1 inch in width may be used. No aero section side panel brace material allowed. No brace or support shall resemble a wicker bill or a split wing.
- Sideboards: Top Wing sideboards maximum size, 72 inches long and 30 inches tall. Panels must be of one-piece construction. Panels must be fabricated flat. Turnouts on all edges of the wing must not exceed 1 1/4” perpendicular to the sideboard x 1 1/4” from the rear of the sideboard forward. The entire panel must remain perpendicular to the center foil. No bending the side panel and/or moving the braces to kick out the right side panel.
- Front wing must be made of metal alloys, max. 6 sq ft, max. 36″ wide, max. 12″ side boards with 1/2″ turn out on top & bottom of sideboards allowed.
- A 1″ wicker bill allowed on flat or dished front wings.
- No split or bi-wings, Gurney lips, rudders or any air flow altering devices allowed. Center Foil must be one piece. No fiberglass, carbon fiber or other similar material may be used in the basic framework of the wing.
- Maximum distance from the center foil front edge to the front edge of the front axle may not exceed 20 inches. The center foil front edge must remain at least 1 inch behind the front edge of the front bumper. The front wing must not extend beyond outside of front tires.
- The front wing may not be cockpit adjustable. No moving parts allowed on or in foil structure.
Tires
– Right Rear Tire: Hoosier Racing Tire: H15, D15A, Medium.
– Left Rear Tire: Hoosier Racing Tire: H12, D12A.
Race Procedures
- Wheel packing: All cars are required to participate if the racetrack needs to be run in/wheel packed.
- Race push off: You are allowed only one push off per race. If you require a second push off, you go to the tail. After drivers have been called to line up for a race, all drivers must be ready for push off or will start at the tail. If belts come loose, driver must stop by an official to buckle up and will not be penalized.
- Running below the tires or off the intended racing surface to pass another car will result in a penalty of two positions per car passed.
- Any car not obeying an official will be black flagged, scored last for the event, and may be subject to forfeiture of all points and payout for the event. This includes, but is not limited to, not getting in the proper position in a timely manner, stopping on the racing surface to dispute a decision, and excessive speed during yellow flag conditions.