250 SPEEDWAY
2008 MODIFIED RULES & PAY OUT
ROLL CAGES
(A) Must consist of a continuous hoop of round tube not less than
1.5 inches outside diameter and must have a wall thickness of at least .095 inches.
(B) Must be frame mounted in at least six (6) places.
(C) Must consist of a configuration of front and rear hoops connected by tubing
on the sides, or side hoops. Drivers head must not protrude above cage with helmet
on and strapped in driver's seat. Roll cage must be securely supported and braced.
(D) Low carbon, mild steel D.O.M. round tubing is recommended.
No brazing or soldering allowed.
(E) Protection of feet is mandatory.
Bar across back of engine with vertical bars and rub rails, or similar protection.
(F) No brace bars forward of cage may be higher than stock hood height.
(G) Chassis must have drive shaft hoop.
(H) Driver doors must be as parallel with the ground as possible,
and located perpendicular to the driver so as to provide maximum protection for driver,
without causing undue difficulty in getting into or out of vehicle.
Door bars must be .095 inch thickness.
Must have a minimum of (3) three bars at least 1 1/2 inch in diameter.
Driver door bars must be plated on the outside, with a minimum 1/8 inch steel or aluminum.
Plate must cover the area from the top door bar to the bottom door bar and
from the rear down post to the front down post.
Steel is to be welded, aluminum is to be bolted with a minimum of 3/8 inch diameter bolts.
Plate must be visible for inspection.
(I) The door bars must be welded to the front and rear of the roll cage.
(J) No brazing or soldering allowed on any of the chassis/frame components.
(K) Floor pans with a minimum of 20 gauge steel; or minimum 1/8 inch thick
aluminum plate may be used.
SAFETY EQUIPMENT
(A) Helmets are required and must meet a minimum standard rating of Snell SA2005 or SA2000.
If no sticker is present 250 Speedway must assume the helmet does not
meet the required standards and will not be allowed.
Helmet must accompany vehicle at time of inspection.
(B) SFI approved full fire suits of a flame retardant nature must be worn
by all competitors at all times.
Fire suit must be in good operable condition.
Two-piece fire suits are allowed.
Fire retardant gloves, neck braces, and shoes are mandatory.
(C) Fire extinguishers are required.
A minimum of one (1) 2 lb properly mounted (not taped or clamped into car with no means to readily remove it, if needed) hand held style fire extinguisher will be acceptable.
A fire suppression system is still recommended, and these 2 extinguishers
can be used in conjunction with each other, if so desired.
(D) Competition type seat belts required.
Belts must be at least 3 inches in width.
Lap belts, shoulder belts, and submarine belts are required.
No factory type seat belts may be used.
Metal to metal buckles required on shoulder and seat belts.
All belts must be dated no more than three (3) years old.
If not dated, 250 Speedway must assume the date has expired and they will not be allowed.
The ONLY recognized date will be the manufactured date as stamped
on the seat belt manufacturers tag.
No sales receipt will be recognized.
(E) Window nets are highly recommended.
TIRES
(A) Any 8” tire allowed
(B) Grooving and / or sipping of tires is permitted.
WHEELS
(A) Eight (8) inch steel wheels only. One (1) inch tolerance for bead locks.
(B) Bead locking devices allowed on the right side wheels only.
(C) Mud plugs allowed on the right side wheels only.
Any mud plug other than foam must be securely mounted to the wheel.
Mud plug should include car number.
250 Speedway Official will determine if the mud plug is securely mounted.
FRAMES
(A) Factory production complete, full, 1950 or newer parallel American passenger car frames only.
Frames may be cut in rear only at a point not further than 36"
both sides, from center of rear end housing.
No front clips or tube type allowed.
(B) Frames may not be widened or narrowed and must be able to support roll cage on both sides.
Frame must be full and complete on both sides.
Front cross member may be notched for radiator clearance only.
Minimum frame height, and body height, must be four (4) inches from the ground.
(C) No Jeep, Bronco, or 4-wheel drive frames allowed.
No sports car frames allowed.
No front wheel drive frames allowed.
(D) Minimum wheelbase is 108, both sides.
NO TOLERANCE.
(E) Maximum overall tread width, front or rear, shall not exceed 78",
measured from outside of tread to outside of tread.
SUSPENSION and STEERING
(A) Front suspension and steering must be O.E.M. and be in stock location,
and must be replaceable by stock part from same type suspension.
Stock passenger car spindles only.
No fabricated spindles.
Aftermarket tube type lower control arms may be used.
Lower control arms cannot be altered or moved,
(exception: may weld shock mount on lower control arm).
May use steel bushings in lower control arms.
(B) Tube type upper control arms are allowed and can be moved.
Cross bar for upper control arm may be aluminum.
(C) No center steering.
In cockpit steering may be modified to drivers taste, but must remain on the left side of car.
(D) No rack and pinion steering.
Steering box must be O.E.M. Steering box
Must remain within original bolt pattern of frame used.
(E) O.E.M. Tie rod ends and adjustment sleeves may be replaced by a minimum
.625 inch (5/8) rod end (hiem joint) and steel or aluminum tube.
(F) Rear of frame may be altered to accept leaf or coil springs.
Any coil spring on car must be at least 4 1/2 inches outside diameter.
Coil springs must be steel.
Leaf springs may be steel or composite type.
Lowering blocks, rear spring shackles, and rear end drive bars may be steel or aluminum only.
No torsion bars allowed in rear.
(G) No hydraulic, ratchet, or electric weight jacking devises allowed anywhere in or on the car.
(H) One shock per wheel only (Dummy shock absorbers are still considered to be a shock). Additional shocks in other locations permissible.
Aluminum shocks are allowed.
No remote reservoir shocks allowed.
(I) No aluminum, fiberglass, or composite suspension, steering, or rear end parts allowed,
except where noted in these rules.
No aluminum hubs allowed.
Front hub & rotor assembly must be one piece steel O.E.M.
(J) Coil over spring / shock units (or combination thereof) allowed on rear suspension only. (this includes lift bar).
No coil over spring / shock units allowed on front suspension.
(K) No covers on springs, shocks, etc. allowed.
With the exception, of a small bellows type shaft cover for a coil over eliminator and / or pull / push bar assembly, for maintenance purposes only.
Shaft covers are subject to approval, and are subject to removal.
BRAKES
(A) Must have a working caliper and rotor on each whee