General Rules
1) All entrants must be 18 years of age. Minors who are 15-17 years old are permitted to participate, but must
have a parent or guardian's signature on a minor release form at the time of registration to participate.
2) Drivers must wear a helmet which extends below the ears and drivers must wear safety belts.
3) No intoxicating beverages or drugs will be allowed or tolerated on the grounds. Unsportsmanlike conduct
will be an automatic cause of disqualification.
4) Demo Derby officials reserve the right to disqualify anyone who is unfit for competition or whose car does not
comply with rules. Rules will be inforced and cars will be checked before and after each feature.
5) No trucks, 4x4 cars, convertibles, commercial vehicles, or Chrysler Imperials will be permitted. Police
cars are allowed. No putting sub frame from Imperials under any other make or model. 4 & 6 Cylinders:
No 4 wheel drive cars. All wheel drive cars must remove drive shaft from the rear axles to make it front wheel drive.
No trucks or convertibles. No converting over larger cars to 4 Cylinders & 6 Cylinders. Please note: IF YOU ARE RUNNING IN THE 2010 NATIONAL DEMOLITION
DERBY THAT NO PRE-BENDING IS ALLOWED TO THE CARS ENTERED IN THAT DERBY. AFTER THE NATIONAL DEMOLITION DERBY, YOU MAY
RUN PRE-BENT CARS AND OLDER MODEL CARS IN ANY CLASS IN DERBIES PROMOTED BY THOMAS MOTORSPORT, LLC. All Cars in the National
Demolition Derby must be 80's or newer for the full size class and in the 6 Cylinder Class the cars must be Front Wheel
Drive Only!
6) There will be a $50.00 protest fee before the derby starts.
7) You will have 60 seconds to make contact or to get your car restarted and make contact.
8) If a red flag is thrown for any reason for the same car twice, you will be disqualified.
Preparation
1) All glass, chrome, carpet, and lights must be removed for safety.
2) Fenders may be trimmed only for tire clearance.
3) Only one piece of 3" inch pipe or 3" tubing may be used for support behind the seat. One piece of 3"
inch pipe or 3" tubing may be used for support behind the steering wheel. The end plates for the pipe or tubing cannot
be larger than 8 x 8 inch square. A roll over bar may be used, but can only be connected to the bar behind the seat.
If a roll over bar goes outside of the car and over the roof, it cannot touch the body. If the fourth bar is added,
the bar must be 12 inches from the passenger door.
4) Cut a 12x12 inch hole in the center of the hood.
5) You may put a number plate with your car number on the car roof so that it is easier to identify your car.
Not mandatory.
6) You may place 2 or 3 bars in the windshield area in front of the driver's view for driver's safety or a
window screen. Not mandatory.
Springs
1) No adding extra leaf springs.
Leaf springs must be stock from factory. Must be staggered.
2) No converting coil springs to leaf springs.
3) You may use a stiffer coil spring on the rear to replace original
coil spring.
4) Springs may be welded, chained, or wired in.
Doors and Body
1) No reinforcements of body except in driver's door.
2) No welding body seams.
3) Do not weld the bottom of the doors inside or outside. Do not weld around the
door window seams.
4) Doors must be secured with chains, wire, bands, or welded. If welded, weld only
seams on doors from door post to bottom of door. Front fenders may be welded to door and the rear quarter panel may
be welded to the door. Welded on plates can be no more than 2 1/2 inches wide on door seams.
Frame
1) No banding, wiring, chaining, or welding the body to the frame
or through the frame.
2) Trailer hitches must be removed.
3) No welding the seams on the top or bottom of frames and no pinning the frames.
4) No painting the frame or inner fenders. No spraying inner fenders or frame with
any material such as rhino lining.
5) Notching the frame is allowed but do not weld cuts.
6) You can remove body mounts and replace with bolts. Bolts cannot be bigger than
7/8" x 10" long. Washers cannot be any larger than 4" around or 4" square.
7) Top A arm or bottom A arm can be welded or bolted down.
8) No welding inner fenders to the fenders.
9) Tie rod ends may be reinforced.
10) If frame is broken or rusted, you may weld 3 x 3 plate on one side of the frame no
bigger than 1/8" thick.
11) Hump plates are allowed on the outside of the frame. Only one piece 3" x 6" x
1/8". (Hump plate cannot exceed past the frame)
Gas Tank
1) The gas supply must be removed from the stock area to behind the driver's seat and securely
fastened and well covered.
2) A gas tank protector can be used. Use no bigger than 3" pipe or 3" tubing.
It cannot touch the floor or body. It must be fastened to the bar behind the seat.
3) Any type of fuel can be used.
Battery
1) Any size battery may be used, securely fastened.
2) No more than two 12 volt batteries may be used.
Bumpers
1) Bumpers are interchangeable. Any car bumper and bumper brackets may be used on
any car. No homemade bumpers or truck bumpers allowed.
2) You may weld the bumper seams, shocks, and the brackets to the frame. No welding
on frame except for the brackets.
3) Bumpers may be cut so they do not smash into the tires during the event. Bumpers
may be flipped.
4) No bumpers may be welded to the body.