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Middle Tennessee District Fair - Demolition Derby
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2017 MTDF Demolition Derby


Wednesday, September 27, 2017 



Video Courtesy of Twisted Metal Videos


"Prize Money*

Feature Winner: $2000, Second Place: $850, Third Place: $450

Heat Winner (3 per heat): $250

*Note: Purse may be reduced due to lack of participation.







Driver Eligibility and Entry Requirements

1. Drivers 18 years of age or older must have and present, upon request, a valid state driver’s license.

2. Any driver age 16 or above but not having yet reached his or her 18th birthday MUST present, prior to participation, a notarized Minor’s Release and Consent Form signed by BOTH parents and/or legal guardians. No one under 16 years of age may participate as a driver or be in the pit area.

3. Derby will be 1980 model and later cars only. 

4. Members of the Lawrenceburg Rotary Club are not eligible to drive, own or sponsor derby entries.

5. Entries are taken on a first come, first served basis. Entry fee must be paid upon arrival. Entry fees are non-refundable.

6. There will be 30 slots available.

7. Entry fee is $50.00 and includes two (2) pit passes. Additional pit passes may be purchased for $20.00 each. Due to insurance regulations, no one under 16 years of age is permitted in the pit area.

8. Driver may enter more than one car.

9. Each driver, each member of the driver's pit crew, and each person purchasing entry into pit and/or controlled area must sign a waiver relieving the Lawrenceburg Rotary Club and the Middle Tennessee District Fair, and any other partnering entities of any liability arising out of any act or omission regarding the event.

10. Cars must be removed from the fairgrounds by noon on the day following the derby. Cars not removed by this time become the property of the Lawrenceburg Rotary Club and will be removed at entrants’ expense.

11.. Heats will be assigned by drawing when the car clears technical inspection.

12. A mandatory drivers’ meeting will be held at 6:15 pm each event night at a location to be announced. Any late rule changes or additions will be covered at this meeting.   




1. Entries are limited to full size cars or station wagons. No trucks, vans, Imperials, Imperial sub frame exchange, or other vehicles are allowed.  03 newer fords/mercury cars must have factory aluminum cradles. For the purpose of these rules, any mention of cars also applies to station wagons.


2. Inspection will start at 3:00 pm and any car not in the inspection line by 5:30 will not be allowed to run. The derby will start at 6:30 pm. Once car has been inspected and approved by Judges the car will be impounded. Inspection times will be appointed upon arrival and once in the impound area no alterations to the vehicle will be allowed. Violations of missing appointed inspection time or making alterations after inspection without the permission of Derby Judge will result in disqualification. Drivers must be present to sign release form.


3. For the safety of all participants, vehicle bodies MUST REMAIN IN STOCK CONDITION (As built by the manufacture).  Pre-bending is allowed but judge will use discretion for safety. NO wedged cars/trunks will be allowed to run. Do not get too excessive with Pre-bending. Folding and welding of the body is NOT allowed and you will not get a chance to fix, instant disqualification. Engines of equal size may be substituted – no electric fans.

4. All doors can be welded using one 2” X 12” sheet steel; thickness of the sheet cannot exceed the thickness of vehicle body panel. Door may be welded shut using a maximum of 12 inches per vertical seam. Max width of metal/strapping is 2” wide (will be measured). Example of use of strapping 1 piece=2”x12”, or 2 pieces=2”x6”, or 3 pieces=2”x 4”. One 24” long piece of chain per door may be used in place of welding.


5. Hood and trunk must be open during inspection, the hood and trunk must be secured with a maximum total of eight bolts four (4) ½” diameter (4 in the trunk & 4 in the hood). Note: retaining washers will not exceed 4” inches in diameter and 1/8th inch in thickness. The forward two bolts in the hood and the aft two bolts in the trunk (1 inch max all-thread FRONT / 1/2 all-thread REAR ) should extend to a solid portion of the frame (body mount hole). If all-thread is used you must substitute 2 of the 4 bolts for hood/trunk. A 12” inch piece of 3/8” chain may be substituted for fore and aft bolts--two for the hood and two for the trunk. No wire is allowed. Remaining bolts must secure only to adjacent fenders. Two pieces of angle iron per side (1/8 thick, 6 inch long) may be used to aid in mounting/ bolting hood to fenders.


6. A minimum of a ten-inch diameter hole must be cut into hood to provide access for fire protection.


7. For driver’s safety, optional cages may be installed. A 4 point cage is suggested for safety. Cages or exterior door bars will be allowed, but not both. If used, cage material diameter must not exceed 4 inch diameter. Vehicle may have a roll bar, it may be interior or exterior built, but cannot give any added support to vehicle in any way except for safety reasons. There must be 8 inches clearance from the front bar of the cage to the firewall. If used, door bars may not extend more than 8 inches past the “front door” jam seam. Door bars must be at least 6 inches off floor/rocker panel. Padding may be added as needed for driver safety. No kickers/braces running from cage to frame for reinforcement will be allowed. Driver’s Door Impacts Will Not Be Tolerated. Two strikes you’re out.


8. Cars not equipped with roll cages must have a bar/plate of 1” X 6” steel bolted across the outside of the driver door and is recommended for the front passenger door; the bar/plate may not extend more than eight inches past the front or rear of the door. Door bars or roll cages are allowed, but not both.. Six inches of padding should be added to the inside of the driver’s door. Driver’s Door Impacts Will Not Be Tolerated. Two strikes you’re out.


9. ALL Glass; Chrome; and Tail and Head Light assemblies must be removed.


10. Bumpers must be in their stock position and will be measured for height at the strong part of the bumper. Must use OEM bumper, no homemade or aftermarket bumpers. The bumper height may be no greater than 24” inches tall and no lower than 16” inches. For purpose of these rules “strong part of the bumper” is where the bolts go through to attach the bumper to the car. Bumper shocks may be collapsed and welded. Bumper shock flange is the flat surface that attaches the bumper to the bumper shock. The bumper shock flange may be welded to the end of the frame and single pass only. Hard nosing is allowed and BUMPERS MAY BE WELDED OR BOLTED TO THE FRAME. No more than 4 bolts per side ½ dia max of bolt to attach bumper to flange. Flange must not exceed ½ thick if used to attach bumper to frame. Frame may be shorten to mount bumper, but must not go past factory body mount hole of core/radiator support.


10-A.  Pre-run cars are NOT exempt to the bumpers height rule. Optional bumper height will be in discretion of Judges.


11. No bumper hitches or supporting framework will be allowed. No chains allowed around bumper to retain bumper or hood.


12. Rear axles may be swapped but must be 4/5 lug, NO full floater or truck rears. Vehicles with WATTS link style suspension (98-up ford/mercury) may use (weld/bolt) older style (OEM) upper link mount and may weld tab to frame to mount lower rear links. DO NOT GET EXCESSIVE WITH FAB OR WELDING.

13. Pitching is allowed but only by cutting/ slicing the factory tabs and then re-welding with a single pass of weld only. Excessive welding will get you disqualified!!!


14. No hub caps, No valve-stem protectors, No bead locks, No tire protector.


15. Drivers must wear an ANSI/DOT approved crash helmet with full face protection provided or approved eye protection. 


16. Cars may have up to two (2) 1” steel rods or equivalent size tubing extending from the top of the roof panel to the cowl/firewall for driver protection.


17. NO SOLID SUSPENSION----vehicle suspension may be raised by leaf spring clamps, or coil spring spacers (must have bounce). Suspension must be OEM components. No leaf spring conversions.


18. Vehicles may use a slip shaft/telescopic driveshaft.


19. Gas tank must be removed and replaced with an outboard motor tank (or equivalent) to be located in the rear of the driver’s compartment. The tank may contain no more than six gallons of fuel, and must be secured in place and covered with a rubber mat in case of leakage.


20. Radiators may have a maximum of two (2) Nylon ratchet straps to help secure. No Spray Foam Insulation will be allowed to secure radiator assembly in place. Radiator must be in stock location. Trans coolers are allowed but must be approved and covered for safety. NO ELECTRIC FANS FOR ENGINE COOLING.


21. Off road tires may be used. No snow/traction studs installed.  Air in tires only, no solid tires or flat proof. No valve stem protectors, bead protectors, or bead locks.


22.   NO ALL BLACK cars, Vehicles must be painted with minimum of 60/40 split of colors. Cars must have a number on door/roof and must be easy to be seen. In case of duplicate numbers, judges will assign a new number which must be painted on each door. No obscene or off color decoration will be allowed. A safely attached 1 foot by 2 foot sheet metal plate with car number or sponsor may be mounted on the top center of the car. Derby officials will inspect and approve mounting for safety.


23. The battery must be relocated to the front passenger compartment and secured to prevent spillage or tipping over, and must have a rubber or plastic cover.


24. The driver’s seat must have a minimum two-point seat belt/harness, which must be used whenever the car and driver are on the track. Backseats and other items must be removed from the car interior, and additional padding may be added for driver safety. Floors must be cleaned and free of trash and glass.


25. No welding (other than what is specifically stated) will be allowed. No fluids of any kind -- transmission, water etc. -- will be allowed with the driver. If the frame of the car has been beefed up, added to, or strengthened in any manner the car will be disqualified from running and the entry fee will be forfeited.


26. NO removal of OEM body bushings except to install front and rear all-thread. In case of broken/ rusty/missing body bolt a ½ inch diameter bolt may be used to repair. If it does not state it in the rules, DO NOT consider the alteration legal without calling and asking first.


27. Gears in rear ends can and should be welded for positive traction.


28. One piece of chain ½” (maximum link diameter) x 12” maximum length, may be added to secure engine to frame at both motor mounts (one chain per side). Cradles are allowed, but no cradles and chains. No pulley protectors or distributor protector.

29. No sharp corners on bumpers, must be factory. Nothing unsafe (in the opinion of derby officials) will be allowed on the track.


30. Cars found to be in violation of any of these rules may be corrected and presented again for inspection prior to the beginning of the first heat. Failure to make required corrections by this time (unless authorized by the judges) will result in disqualification and entry fee will be forfeited.


31. IMPORTANT—once a car has been inspected and allowed into the pit/impound area nothing else may be altered on the car. Anyone caught adding any reinforcement will be disqualified and entry fee will be forfeited.


32. Prize money for winning cars will be awarded only after final inspection of said vehicles. Any violation of vehicle requirements will mean immediate disqualification and remaining vehicles will move up one place in the final standings.  


33. Any disqualification of an entry for a violation of these rules will result in a forfeiture of the car's entry fee.