TIckets Auburndale Speedway: Adult $18 | Seniors 60+ $15 | Kids (6-12) $5 (4 & Under Free) | Family Pk (2 adults 2 kids) $37
2024 OPEN WHEEL MODIFIED RULES
● Any differences in these rules please call and we will try to accommodate
● Speedway Officials shall be empowered to permit minor deviations from any of the specifications herein or impose any further restrictions that in his/her opinion does not alter the minimum acceptable requirements. No expressed or implied warranty of safety shall result from such altercation of specifications.
● Speedway reserves the right to update, modify, and/or delete rules at any time deemed necessary to ensure safety, fair competition or any other reason that may be appropriate
NO CARBON FIBER. TITANIUM, TUNGSTEN OR EXOTIC METALS ALLOWED ON CAR UNLESS OTHERWISE NOTED.
WEIGHT:
A. All motors must weigh 7lbs. per cubic inch and 2500 minimum. 56% left side maximum.
B. It is mandatory that weight and cubic inches be displayed on the right side of your hood at all times.
C. Tube clip must have 50 lbs. in front of flywheel
CAR:
American made, factory production, 1970 or newer with parallel frame, rear wheel drive only. Minimum wheelbase 108” and must be within 1/2 side-to-side.
CHASSIS:
A. OEMstock full chassis clips or Fabricated/tubular frames (must be approved by Tech).
B. Frames may not be widened or narrowed and must be able to support roll cage on both sides. Front cross member may be notched for radiator clearance only. NO widening or fabricating of cross member. Must maintain stock measurement from cross member to A frame bolts.
C. Ride height minimum 4” Body, Frame and Lead at all times. No pulling up on car in tech line.
D. MODIFIED TUBE CLIP: Must use stock lower A-Frames, steering box and idler arm. Must maintain 3 ¼ “from lower control arm bolts to bottom of cross member at all times. Lower mounts must be solid and nonadjustable. Must measure 17”– ¼” tolerance from center bolt to center bolt on front side of lower control arm and 27”– ¼” tolerance and any tube clip that doesn’t meet these specs will be deemed illegal.
E. Absolutely no bump-stops, coil binding, short shock shafts or chassis stops of any type and will be checked by putting front tires on ½” blocks and cross-member/nose on the ground.
BODY:
A. Width 66” maximum, Length 120” maximum measured from front of door/back of engine block to end of rear quarter at any point. 6” maximum body rake. Maximum 3” at door and 3” inch at quarter to get the 6” total. Body must be mounted straight on chassis. No wings or other ground effects anywhere inside or outside car.
B. Firewalls can be aluminum and floorboards are made of Steel only.
C. Full roof is mandatory and must cover complete halo bar. No drip rails allowed.
D. Rear spoiler allowed 6” x 60” only and must be centered on body.
E. Engine compartment will remain open, no side panels; hood sides may have a maximum six (6) inch drop and be enclosed at rear of hood; bodies should extend no further than back of block. (NOTE: passenger side of body must be no further forward than rear of block.)
F. Maximum front nose width 43 ½ inches and all non-Five-star noses may have a maximum of 2 ½” lips on top of nose only, no splitters, ledges or fins.
ROLL CAGE:
A. Must consist of continuous hoops, not less than 1-3/4” outside diameter and must have a wall thickness of at least .095 and must be frame mounted in at least six (6) places.
B. Must consist of configuration of front and rear hoops connected by tubing on the sides or side hoops. Driver’s head must not protrude above cage with helmet on and strapped in driver’s seat. Roll cage must be securely supported and braced.
C. Protection of feet is mandatory. Bar across back of engine with vertical bars and rub rails or similar protection.
D. No brace bars forward of cage may be higher than stock hood height.
E. Driver door bars must be as parallel with the ground as possible and located perpendicular to the driver so as to provide maximum protection for driver without undue difficulty in getting into or out of the vehicle. The side bars must be welded to the front and rear of the roll cage members. Door bars less than .095” thickness should have four (4) bars at least 1 1/2” diameter.
Bumpers:
A. Must be used in both front and rear. Front bumpers should be mounted frame end to frame end with the bottom loop parallel to the ground. Should be made of minimum 1-1/4” steel tubing and must be welded to support car if lifted by wrecker.
B. Rear bumpers, side bars, and bodies must not extend beyond width of rear tires and must not contain any sharp edges.
C. Rear bumpers may be constructed of pipe or flat stock and must protect fuel cell. Center bumpers (FRONT AND REAR must be 18 inches (plus or minus 2”) from ground.
FUEL CELL:
A. Maximum of 22-gallon fuel cell in steel can and a minimum of 8” ground clearance.
B. OBERG Fuel Valve # SV-0828 or SRI # FFF-FSV will be Mandatory.
C. Must use track fuel only.
DRIVESHAFT:
A. No aluminum drive shafts must be steel and must be painted white with two dive shaft loops.
SUSPENSION:
A. Stock passenger car spindles only; NO fabricated spindles. Center of ball joint to center of tie rod must be stock.
B. OEMBottom A-frames cannot be altered or moved. Ford lowers are allowed as long as they mount in stock mounts.
C. One-piece OEM or aftermarket sway bar only.
D. No fiberglass springs allowed. No torsion bars allowed in rear.
E. No hydraulic, ratchet or electric weight jacks anywhere in or on car.
F Only one steel non-adjustable shock per wheel only but Aluminum knuckle o. k. Adjustable shafts and canisters are NOT permitted. No coil over’s on front but rear coil over’s may be used on the rear only with minimum spring diameter 5 “.
G. OEMsteering box only. Heim joints on tie rods are allowed. Aftermarket center link, idler arm and pitman arm allowed. No racks.
H. Front rotors may be re-drilled for larger studs or different lug pattern, but may not be lightened.
ENGINE:
A. Any American made engine may be used as long as the rear of the engine (bell housing flange) is mounted at least 72 inches forward from the center line of the rear axle. Engine offset must be kept within the front stub. (Engine offset maximum two (2) inches of center- line of front cross member.) Crankshaft height minimum will be 11 inches from the ground to front center of crankshaft. SB2 engines are permitted. Must be wet sump engines only but a single stage, external drive oil pump will be permitted. No aluminum blocks permitted.
B. NO TOTAL “dry” sump systems allowed. “Wet” system must be operative.
C. One (1) two (2) barrel or one (1) four (4) barrel carburetor o. k. must be normal aspirated. Use of Holley #4412, 500 cfm carburetor. Carburetor restriction must be done with a solid plate or cone type system only, and may NOT be externally adjustable in any way. No adjustments may be made to the carburetor/restrictor package following qualifying. *NO TRACTION CONTROL DEVICE(S) OF ANY KIND.
D. Exhaust system must be mounted in such a way as to direct spent fumes away from cockpit of vehicle and must extend past frame rail, and away from all areas of possible fuel spillage.
IGNITION:
1.One battery permitted. Maximum 16 volt and mounted securely outside of driver’s compartment.
2. All wiring must be sealed. No unplugged wiring.
3. NO Traction Control Devices of any kind– If any ‘traction control’ device is found, the driver and owner will be disqualified from the event and possible Suspension and Fine.
TRANSMISSION:
1. Must have at least two forward gears and one reverse, plus a neutral position
2. Multiple disc clutches with steel floaters and pressure plates permitted, minimum 5 ½” in diameter. Solid magnetic steel clutches and pressure plates only. Clutches must be positive engagement design. Slider or slipper clutch designs are not permitted. No carbon fiber clutches. Clutches found not to meet this definition will be deemed illegal.
DIFFERENTIAL:
A. Must be 9” floater or quick change.
B. NO Wide 5.
C. NO rear sway bar.
WHEELS & TIRES:
A. Track approved tires only. No soaking or altering of tire in any manor allowed. Drivers soaking or altering tires will forfeit all purse and points for the event and all track points for the year. Driver must also pay a $1,000 fine prior to being allowed to compete at Speedway. Any illegal tire, in the judgment of Speedway Officials, will be confiscated.
B. Wheels maximum width 8”, steel only and must be racing wheel. Tires must not be outside side bars.
C. 80” tread width maximum, will be measured outside to outside at hub height NO tolerance.
D. No Bleeders.
BRAKES:
A. Brakes must lock up all four (4) wheels during post inspection.
B. Front and rear brakes must consist of stock appearing components Single piston only.
C. May run steel or aluminum front safety hubs
Safety:
A. See Super Late Rules
Rule Enforcement
