Demo Derby Rules

P.O. Box 707, 601 Fairgrounds Road
Mt. Vernon, Ohio 43050
740-397-0484
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DEMO DERBY BIG CAR & COMPACT F.W.D.

1. Stock gas tank must be removed. An auxiliary tank must be placed on floor

pan from midline of car interior to left side of vehicle behind the drivers seat.

2. Auxiliary tank must be of steel or a designated plastic fuel tank, not to exceed

six (6) gallon capacity. (Portable marine outboard tank recommended.)

3. Auxiliary tank must be securely fastened to floor pan around and through floor

pan. If gas tank supports are attached to rear seat bar-support bars must

remain free floating. No longer than 24” length and width.

4. ALL GAS LINES THROUGH INTERIOR OF CAR MUST BE STEEL OR BRAIDED

STEEL. However, at maximum length of twelve (12) inches of non-steel/braided

steel gas line hose and clamps can be used for coupler (connection) off the

auxiliary tank.

5. Tank must have a secured cap. All gas lines and fittings must be leak-prof.

(Pump gas only)

6. Auxiliary tank must be completely covered and secured such that it precludes

gasoline from slashing on driver in the event of rupture.

7. Auxiliary tank cover removed for vehicle inspection.

8. Absolutely no one (1) to five (5) gallon carrying gas can permitted for auxiliary

tank.

9. Any leakage of fuel will lead to immediate disqualification of car. Electric fuel

pumps must have an on/off switch. Must be within driver’s reach and labeled.

10. All glass must be completely removed from automobile. Includes mirrors, tail

and headlights, windshield (mud screen is permitted), (simply rolling door glass

down is not permitted) also remove any broken glass inside automobile.

11. At least one (1) mandatory chain, cable or strap (max 2 pieces) running

vertically from the roof to the cowl in windshield area for driver’s protection.

12. All rear and front plastic bumper covers must be completely removed. Includes

fiberglass header panel, 1/4 panel extensions, chrome moldings, antenna,

windshield wiper arms, sun visors and any other dangerous loose objects.

13. Safety glasses, goggles, or shield must be worn.

14. No steering knob is permitted. Distributor protectors are allowed. (12” wide

max)

15. No engine cradle or pulley protectors. Motor mounts may be reinforced, welded,

or chained down.

16. Converting Watts-Link (FoMoCo) to a standard 4 link system: use trailing arms

off an older Ford or metal of the same size and thickness. No shortening trailing

arms, no positioning brackets to strengthen the down leg of the rear

hump. You may cut out the coil spring frame tray from an earlier year Ford and

weld it in the newer Ford. No stronger than stock.

17. No truck rear end. No trusses or added braces on rear end housing.

18. Lap seat belt and full helmet with chin strap are required. No shoulder belt.

19. No protruding front or rear frame horns (ends). Must be rounded or flattened.

20. NO FULL roll cage is permitted. You have the option to install a dash bar and

a rear seat bar. The rear bar must be installed behind your seat, running

horizontally. You may also connect a halo bar to the rear seat bar only. NO

kickers off the bar to frame. Dash bar must be installed horizontally above

steering column at least 5” behind distributor protector and windshield strap.

You may also install left and right bars (8” wide maximum) inside of car and

dash bar to rear bar. NO kind of kicker bar from rear window (roof).

21. NEW Front spindles must remain stock for that model. NO aftermarket/heavy

duty allowed.

22. Only one (1) automobile type battery is permitted and it may be located in any

position of the car. Battery must be securely fastened and covered.

23. Radiator must remain in original position or be removed. Any modified

transmission cooler must be securely and safely installed under the hood only.

Anti-freeze should be flushed and only water added. T

24. No locked up suspension, blocked shocks, spring jacks, or shackles. Vehicle

must have free suspension movement up and down. If replacing coil springs,

front and rear must be able to bounce freely. Stock frame height front to rear

must be maintained.

25. Fenders and 1/4 panels cut for wheel clearance only. NO screwing, wiring,

bolting or welding of folded over sheet metal inner to outer wheel openings.

26. All doors must be securely fastened by chain, wire, steel straps, seat belts or

welded. No plating or welding inside door breaks (Exception: Drivers Door.)

27. Driver’s door may be reinforced on outside but not exceed eight (8) inches in

front or behind door breaks. Outside door reinforcement must be flat. Driver’s

door ONLY may have a welded cap placed over window opening and be welded

all the way around. Driver’s door interior upholstery must remain in place or be

suitably replaced. Drivers window opening to remain stock height.

28. All other welded doors can be secured with a maximum three (3) inch wide

strip, not exceed 1/8” thick covering door breaks vertically from window

openings down. NO welding caps over window openings or welding door

headers to roof or center post. NO welding bottom of doors to rocker panel. All

End-of-Season Championship cars must have a left driver’s door reinforcement.

29. All excessive holes in firewall and front floor pan must be covered.

30. Cars must be clean of all debris prior to coming to this event.

31. All cars must have breaks to enter. No pinion or drive shaft brake.

32. If equipped, all steering and passenger air bags are to be removed completely.

33. NEW Hood must be fastened down in a minimum of four (4) places, maximum

of six (6) places with wire, seat belt, chain or threaded rod. If threaded rod is

used, only 2 may go to frame or through body bolts in front of core support.

Rods cannot exceed 1” in diameter and must not extend more than 6” above

hood. Rods may be bolted (a maximum of 3 nuts per rod may be used) or

welded vertically to frame (weld must not exceed 6”). Plates holding down hood

may not exceed 6”x6”). NO pipe over threaded rod, hood tie downs in front of

radiator, welds on hood or flagging front of hood.

34. Mandatory hood openings must be cut over each side of carburetor,

approximately eight inches (8”) or larger. Hood sheet metal must remain

over top of fan blade. If hood is removed, mechanical fan blade must also be

removed. Electric fans are permitted.

35. Trunk lid must remain on hinges and outside top of 1/4 panels. Trunk lids that

are stuffed, tucked, or folded intentionally inside of trunk compartment are not

allowed. IF THE TRUNK LID DID NOT START OUT ON TOP OF 1/4 PANELS DO

NOT BRING IT.

36. TRUNK LID OR TAIL GATE: Must be fastened down in four (4) minimum places

and maximum of six (6) places with chain, seat belt, bolds or wire. 2” max

washers can be welded to sheet metal for the above fasteners to pass through.

Sheet metal to sheet metal only. You may also weld two (2) 16” vertical x 4”

wide 1/4” thick straps to trunk lid to bumper. You may weld solid or weld (3”

wide x 1/8 thick) metal strip over trunk lid top seams only.

37. NEW Rear of deck lid, 1/4 panels and tail panel must remain vertical (up right

– do not pound down or mash over intentionally). Wedging front of deck lid,

package tray and center 1/4 panels are permitted. Roof line stock position.

38. You may interchange any stock automotive bumper front or rear to any model.

Bumpers must be welded, chained, double bolted, or wired onto car. NO

Fabricated/HOMEMADE Bumpers. Front and rear bumpers may be welded

to the brackets and brackets to frame. Front frame seams only from A arm

forward can be welded. One (1) added brace from each frame horn to bumper

is permitted. Trailer hitch must be completely removed.

39. Must run an ignition switch. NO bare wire ends permitted for ignition off/on or

starter.

40. Left front door should be painted white for driver’s safety. Right front door must

be blank for car number. Special numbers will be permitted on a first come

basis.

41. Car may be decorated, but only in good taste.

42. All work on car should be completed before entering inspection.

43. Maximum 16” tires, 8-ply, D-LOAD RANGE, maximum 30” in height and air only

are permitted. Tires cannot be bolted or screwed to rim. Valve stem protectors

are permitted. No double or liquid filled, studded, TRACTOR PADDLED,

IMPLEMENT, greased, wheel weights, forklift or solid tires permitted. Must be

DOT approved and pass inspection.

44. NO SEDAGON (body) type automobile permitted.

45. Extra bolting or chaining any part of body to frame is not permitted. All body

and core support washers can not exceed three inches (3”) in diameter and

must be through one thickness of the frame only. REMOVING BODY MOUNT

CUSHIONS IS ALLOWED.

46. All modified exhaust pipes must point downward or straight up through hood.

47. No skid plates of any kind. NO doubling of body sheet metal anywhere.

(Exception: Driver’s door.)

48. You may weld a 1/4” thick by 22” long hump plate, contoured to the hump,

centered with one pass of 1/4” weld to the outside only, matching the factory

hump. Do not span hump. This is not allowed on the 2003 FoMoCo and newer

frames.

49. You may cut and re-weld stock flaps on front outside of FoMoCo frames to

pitch. Tip, Tilt. NO additional metal or re-welded frame cowl boxes. Other than

described by the rules above. NO extra welding, braces, reinforcements, added

brackets, filling holes, plating inside or outside of any frame. OFFICIAL DECISION

IS FINAL.

50. Driver and pit crew fully accept and assume the responsibility and liability of

properly and safely constructing his/her own Demolition Derby car as well

as their actions and behavior at the event, and acknowledge that the U.S.A.

Demolition Derby Inc. does not expressly or impliedly warrant the safety of, or

the manner in which the participants have constructed their Demolition Derby

car or any of its component parts, or their actions and behavior at the event.

51. Car and driver must be signed in and inspected at the track at least 30 minutes

prior to show time. No entry fee refund if you arrive late. NO EXCEPTIONS!

 

SAFETY & SET-UP PREPARATION OF CAR BIG CAR

DEMO DERBY

BIG CAR

DEMO DERBY

1. STOCK GAS TANK MUST BE REMOVED. An auxiliary tank must be placed on

floor pan from midline of car interior to left side of vehicle behind the driver’s

seat and no further rearward than front of rear axle.

2. Auxiliary tank must be of steel or designated plastic fuel tank, not exceed six

(6) gallon capacity. (Portable marine outboard tank recommended.)

3. Auxiliary tank must be securely fastened to floor pan and around and through

floor pan.

4. ALL GAS LINES THROUGH INTERIOR OF CAR MUST BE STEEL OR BRAIDED

STEEL. However, a maximum length of twelve inches (12”) of non-steel/

braided steel gas line hose and clamps can be used for coupler (connection)

off the auxiliary tank.

5. Tank must have a secured cap. All gas lines and fittings must be leak-proof.

6. Auxiliary tank must be completely covered and cover secured such that it

precludes gasoline from splashing on driver in the event of rupture.

7. Auxiliary tank cover must be removed for vehicle inspection. Pump gas only.

8. Absolutely NO one (1) to five (5) gallon carrying gas cans permitted for

auxiliary tank.

9. Any leakage of fuel will lead to immediate disqualification of car. Electric fuel

pumps must have on/off switch. Must be within driver’s reach and labeled.

10. ALL GAS MUST BE COMPLETELY REMOVED FROM AUTOMOBILE. Includes

mirrors, tail and headlights, windshield (mud screen is permitted), all door

glass (simply rolling door glass down is not permitted) and any broken glass

inside automobile.

11. At least one (1) mandatory chain, cable or bar must be installed vertically

between roof and cowl (middle of windshield) to prevent hood from entering

driver’s compartment.

12. All rear and front plastic or fiberglass must be completely removed. Includes

fiberglass header panel, 1/4 panel extensions, chrome moldings, antenna,

windshield wiper arms, sun visors and any other dangerous loose objects.

13. Safety glasses, goggles, or held must be worn.

14. NO two way radio, cell phones or steering knob is permitted in car during

competition.

15. NO ENGINE CRADLE or pulley protectors. Motor mounts may be reinforced,

welded or chained down.

16. Lap seat belt and full helmet with chin strap are required. No shoulder belt.

17. NO protruding front or rear frame horns (ends). Must be rounded or flattened.

18. NO ROLL CAGE IS PERMITTED. You have the option to install a dash bar and

a rear seat bar. The rear bar must be installed behind your seat, running from

door post to door post horizontally. NO kickers off the bar. Dash bar must be

installed horizontally above steering column. You may also install left or right

bars (8” wide maximum) inside of car from dash bar to rear bar. NO other

bars allowed inside auto.

19. Only one (1) automobile type battery is permitted and it may be located in any

position of the car. Battery must be securely fastened and covered.

20. Radiator must remain in original position or be removed. Any modified

transmission cooler must be securely and safely installed under the hood

only. Anti-freeze should be flushed and only water added.

21. No locked up suspension, blocked shocks, spring jacks or shackles. Auto

must have free suspension movement up and down. If replacing coil springs,

front and rear must be able to bounce freely. Stock frame height front to rear

must be maintained. WILL BE STRICTLY ENFORCED.

22. Fenders and 1/4 panels cut for wheel clearance only . NO screwing, wiring,

bolting, or welding of folded over sheet metal inner to outer wheel openings.

23. All doors must be securely fastened by chain, wire, steel straps, seat belts, or

welded. NO plating or welding inside door breaks (Exception: Drivers Door.)

24. Driver’s door may be reinforced on outside but not exceed eight inches (8”)

in front or behind door breaks. DRIVERS DOOR ONLY may have a welded cap

placed over window opening and be welded all the way around. Driver’s door

interior upholstery must remain in place or be suitable replaced.

25. All other welded doors can be secure with a maximum four inch (4”) wide

strip not to exceed 1/8” thick covering door breaks vertically from window

openings down. NO welding caps over window openings or welding door

headers to roof or center post. NO welding bottom of doors to rocker panel.

All End-of-Season Championship cars must have a left door reinforcement.

26. All excessive holes in firewall and front floor pan must be covered.

27. Cars must be clean of all debris prior to coming to this event.

28. All cars must have breaks to enter.

29. If equipped, all steering and passenger air bags are to be completely removed.

30. Hood must be fastened down in a minimum of four (4) places, maximum of six

(6) places with wire, seat belt, or chain through each hold. NO hood tie-downs

in front of radiator. NO reinforcing tie down holes with welded-on washers.

NO welds on hood. NO hood pins or bolts with washers can be used to fasten

down front of hood.

31. Mandatory hood openings must be cut over each size approximately eight

(8) inches or larger. Hood sheet metal must remain over top of fan blade. If

hood is removed, mechanical fan blade must also be removed. Electric fans

are permitted.

32. Trunk lid must remain on hinges and outside top of 1/4 panels. Trunk lids that

are stuffed, tucked or folded intentionally inside of trunk compartment are not

allowed. FASTENED DOWN LIDS MUST HAVE A 10” INSPECTION HOLD CUT.

33. You may interchange any stock automotive bumper front or rear to any model.

Bumpers must be welded, chained, double bolted or wired onto car. NO

FABRICATED/HOMEMADE BUMPERS. Front and rear bumpers may be welded

to the brackets and brackets to frame. Front frame seams only from strut

tower forward can be welded. ONE (1) added brace from each frame horn to

bumper is permitted. Trailer hitch must be completely removed.

34. Must run an ignition switch. NO bare wire ends permitted for ignition off/on

for starter.

35. Left front door should be painted white for driver’s safety. Right front door

must be blank for car number. Special numbers will be permitted on a first

come basis.

36. Car must be decorated, but only in good taste.

37. All work on car should be completed before entering inspection.

38. Maximum of 16” tires, 8-ply, D-LOAD RANGE, maximum of 30” in height

and air only are permitted. Tires cannot be bolted or screwed to rim. Valve

stem protectors are permitted. NO DOUBLE OR LIQUID FILLED, STUDDED,

TRACTOR, PADDLED, IMPLEMENT, GREASED, WHEEL WEIGHTS, FORKLIFT

OR SOLID TIRES PERMITTED. Must be DOT approved and pass inspection.

39. NO SEDAGON (body) type automobile permitted.

40. All modified exhaust pipes must point downward or straight up.

41. No skid plates of any kind. No doubling body sheet metal anywhere.

(Exception: Driver’s door.)

42. Driver and pit crew fully accept and assume the responsibility and liability of

property and safely construction his/her Demolition Derby car as well as their

actions and behavior at the event, and acknowledge that U.S.A. Demolition

Derby Inc. does not expressively or impliedly warrant the safety of or the

manner in which the participants have constructed their Demolition Derby

car or any of its component parts, or their actions and behavior at the event.

43. Car and driver must be signed in and inspected at the track at least 30 minutes

prior to show time. No entry fee refund if you arrive late. NO EXCEPTIONS!