Demolition Derby

Bodies
1. American design steel or fiberglass bodies through 1958-coupes, sedans, & pickup trucks. Fenders are optional.

2. Bodies may be significantly altered/sectioned/channeled/ relocated in any safe manner. Stock configuration bodies are allowed.

3. Door panels should not be cut down to the point of exposing driver to increased danger. "Turret" tops or open roofs should be covered by sheet metal and securely fastened.

Chassis
1. Car frames through 1958 are allowed, as well as any ½ ton pickup frame with solid front axle and leaf spring all around.

2. Frame shall be factory production, may be altered up to 10%, and shall otherwise retain stock configuration. Reasonable and necessary rust repairs are allowed. Front and rear "clips" are to retain the original stock configuration.

3. Other years may be allowed, but only to the discretion and approval of the Division Committee.

Front Suspension
1. Suspension shall remain stock for year and make of frame, except for the following modifications:

a. heating of springs

b. heavy duty OEM coil springs may be substituted in original a-frame front ends. Coil spring spacers may be used – no racing coils permitted.

c. number of spring leafs may be changed.

d. any stock solid front axle assembly w/leaf springs may be substituted in place of an original coil spring suspension. Coil springs can not be substituted for a solid axle.

e. Ford transverse springs may have one shackle "locked" in position to prevent side sway.

f. shackle length may be changed.

g. camber/caster may be changed.

h. frames may be reinforced, so long as stock configuration is retained.

i. wheels may be reinforced, or ¾ ton safety hubs utilized.

j. up to two stock factory issue shocks of any configuration per wheel, or one racing shock.

k. jacking bolts or devices are allowed.

l. no torsion bar or coil over assemblies.

Rear Axle/Suspension
1. Any factory production rear axle may be used, so long as stock rear suspension is retained.

2. Quick change rear ends may be used, so long as owner/driver truthfully shares overall ratio information with any competitors asking for that information.

3. Rear ends may be locked.

4. Open drive shafts may be substituted for enclosed drivelines and vice versa.

5. Up to two stock factory issue shocks of any configuration per wheel or one racing shock

6. Jacking bolts or devices are allowed.

7. Rear leaf springs will be the standard use.

Tires/Wheels
1. Wheels up to 12 inch width are acceptable.

2. Maximum tire tread width is 12 inches.

3. Any circumference tire may be used – these will function as a "poor man’s quick change."

4. Racing slicks are allowed, as well as standard DOT street tires.

5. Stock steel wheels may be reversed or offset to edge of rim.

6. Ford wide five wheel or safety hub may be adapted to any corner of the car, in any secure manner.

Engines
1. Any "STOCK" OHV V-8 engines with a single carburetor will be allowed, up to the following limits: GM/FORD/MOPAR-up to 350 cubic inch

2. "STOCK" is referred to as: a basic motor. All stock parts, no racing or performance parts allowed.

3. Any race version of in line 6-cylinders or race flathead V-8’s are allowed.

4. Dual carburetors are allowed on these engines.

5. Pretty much a "run whatcha brung" for these engines only.

6. Engines may be relocated(set back or offset).

7. Exhaust headers are allowed.

8. No aftermarket ignition systems allowed, except for race 6 cylinders or flat heads.

Transmission/Clutch/Flywheel
1. Any factory stock 3 or 4 speed or automatic is allowed. No racing transmissions.

2. Light flywheels allowed.

3. No racing clutches.

Seats
1. An Aluminum racing seat only.

2. All seats must be firmly attached directly to the frame/roll cage structure by no less the 6 3/8 grade 8 bolts, or equivalent.

Belts/Harnesses
A five (5) point quick release harness should be the minimum considered, with web straps at least 2 inches. This harness must be in good condition and securely fastened to the frame/roll cage structure. Strap attachments must be mounted in line with the direction of pull to be most effective. Lap belts must be angled down and to the rear at 45 to 60 degree angle to the ground, and as close to the hips as possible to be effective. Shoulder straps should be mounted just below shoulder level.

-Harness attachments should be capable of withstanding violent snap rolls and impact stresses (3000#) and bolted with 3/8" grade eight bolts.

-Sharp edges in proximity of harness straps must be protected by edge guard – straps WILL move in a crash.

-Window nets are recommended for all classes. If the passenger door is cut down, consider using one or two old lap belts with quick release buckles to protect the opening from flying tires, etc.

Fuel
1. Pump gasoline only.

2. Fuel cells are highly recommended.

Batteries
1. Batteries must be SECURELY MOUNTED and SECURED inside an angle iron frame/support and covered.

Windshield
1. Each car needs to have a lexan windshield.

Brake System
1. Must have working brakes on all four corners.

Bumpers/Guard Rails
Bumpers should be securely welded or bolted to the frame and should not extend beyond the center of the tire tread. Bumpers should be constructed in such a fashion that there are no sharp edges which could cut tires, or act as a "can opener" to body sheet metal of fuel tanks. Bumper ends should be rolled or otherwise fashioned to minimize locking of bumpers.

It is recommended that open wheel cars run secure rub rails on both sides of the car to minimize the possibility of a race car becoming airborne. Open wheels will air launch quite effectively. The ends of rub rails should be rolled back to the frame rather than end with sharp angles that can cut tires. Rub rails should not extend beyond the outside of the tires.

Fire Extinguisher
1. A 2 ½ pound dry powder(B/C Rated) fire extinguisher is the minimum.

Skid Pan
1. For protection of the oil pan, a skid pan is highly recommended.

Cooling Systems
1. Drivers must be protected from hot fluids by either a firewall/hood or firewall/full windshield.

2. A coolant "catch can" is needed. A "catch can" should be made of metal or plastic and not glass.

3. Water Only.

Roll Cages
A 6 point roll cage of standard .095 x 1¾ roll cage tubing is the minimum.

General Information
We are looking for even and competitive race cars!

The Bottom line is to keep the cost down as much as possible. Yankee ingenuity is encouraged, but we can’t let it get away from the competition level. If modifications are needed to even the playing field up, they will be assessed through the Division Committee to the individual racer. This will equalize competition within the division in such a way so as to provide exciting, enjoyable, and affordable racing activities in which each competitor will feel they have been fairly treated.

Any questions on Vintage Modified rules, please contact:

Robert Hills

207-342-2935