Rules For Petrolia Demo Derby

V-8 class Demo Derby Rules and Regulations

1975 to 2002. 2003 and newer must have stock front suspension and steering.

1. FLAMMABLE MATERIALS
Seats & trim – All must be removed from the vehicle except driver’s seat.
2. GLASS/AIRBAGS
All windows, mirrors, airbags & trim must be removed prior to inspection.
3. TRAILER HITCH
Must be removed and all sharp edges must be hammered down prior to inspection.
4. DOORS & NUMBERS
Driver’s door must be PAINTED WHITE.
5. FIRE EXTINGUISHER
Must be within reach of the driver and must be in working order.
6. BATTERY
May use one 12 volt car battery only. Must be moved to passenger side floor and securely fastened in a box/ container clear of all fuel sources. Following inspection it must be covered with a non-flammable shield.
7. GAS TANK
Stock tanks must be removed. Must use a steel marine tank, custom steel tank or certified racing fuel cell. No plastic tanks. All tanks must be securely fastened down (bolted) in the middle of the back seat area. Tank must be covered with a non flammable material after inspection.
GAS TANK PROTECTORS – may extend off seat bar around the rear of tank max 3” X 3” tubing ¼” wall thickness. Protector CANNOT be bolted through rear firewall. Maximum width of protector is 24 inch outside diameter.
8. FUEL LINES
All fuel lines must have a leak proof fitting with steel or rubber lines (no clear lines). No exceptions. Lines must run inside car.
9. ELECTRIC FUEL PUMP
Must have a safety shut off switch (punch button), marked in red, located on roof, in center of windshield for official’s use.
10. FUEL SYSTEM
Electric fuel pump must be isolated with a non-flammable material covering lines, tanks and pump.
Non-flammable covering may be fire resistant blanket or airbag material.
11. HOOD
Hoods are not mandatory but without a hood you must use electric fan only. Fans directly connected to the motor must be removed.

With a hood – a 12” opening must be cut in the hood directly over the carburetor (not over fan).
Hoods must remain open for official’s inspection.
Hood must be fastened down in a maximum of 6 places with seatbelt strapping, wire, ¼” chain or can be bolted to the fender with maximum ¾” threaded rod.

* Hood latch is to be removed prior to inspection .

Hoods maybe have a 1” weld up to every 12”. Under hood bracing.

12. TRUNKS
Trunks/tailgates to be fastened down in same way as hood or may be welded using a maximum of 10- 3” square plates. If trunk is welded a 16” square hole must be cut in top of trunk for inspection.
13. BODY PANELS
Metal may be cut from around wheels for clearance. Front & rear quarter panels may be bolted with up to 5 bolts per panel – maximum 3/8” bolt.
14. DOOR FASTENING
Driver’s door may be welded solid. All other doors must be fastened shut with wire, straps, ¼” chain, a
1” weld up to every 12”, or 6 -3” square plates welded on per door.
15. BRACING
Outside of car may have a 12” X 72” X ¼” thick max steel plate applied to driver’s & passengers doors, bolted in 4 locations (with a maximum ½” bolt) & a 1” spot weld every 12” Bevel should not exceed 20 degrees and can bevel only 2” or less from edge of plate . Ends must remain open. NO “C” CHANNEL OR ANGLE IRON.
16. ROLL BAR
Single roll bar up each door frame, inside or across outside of the roof. Roll bars going across the roof must be bolted to the roof in 2 places for safety. The roll bar may be welded or bolted to the frame or rockers. An additional bar may be added behind the seat welded or bolted from roll bar to roll bar. MAX 4” round or square tubing. No excessive use of materials.
17. WINDSHIELD SPACE
Must have at minimum, a single steel or chain from the cowl to the roof bolted or welded. The “A” or “H” protectors are allowed but must look like an A or H. The cross brace must be in the middle and may in no way come in contact with the distributor protector. The horizontal bar must be a minimum 8” from cowl if using the “A” it may be welded or bolted in 3 spots. If using “H” it may be welded or bolted in 4 spots & cannot come in contact with distributor protector or dash bar.
18. DASH BAR
Minimum 3” to Maximum 4” square tubing mounted door frame to door frame but not to firewall.
Dash bars not mandatory. Driver safety.
19. INTERIOR MODIFICATIONS
No welding of any inside body support seams or firewall seams. All holes in firewall must be covered with a non-flammable material. Large holes in car floors must be repaired with the same gauge metal and securely fastened. No reinforcement.

SAFETY FLOOR PLATES on drivers side can be installed, bolted 1 spot through the frame and 5 spots through floorboards (MAX ¼” plate)

20. BUMPERS
Any bumper on any model car can be seam welded but NOT LOADED! Officials may request a hole be made in bumper for inspection. Bumpers may be mashed in so not to catch on other cars. Bumpers may be wired or welded on. You may wire bumper to hood or rad cradle.maxium 6 places.
21. FRONT GRILL
No screens allowed (Stock AC condensers permitted in original position).
22. RADIATOR
Must be flushed of anti-freeze and replaced with water only. Overflows must point straight down.
Floating rad cradles with a maximum 1/8” gauge steel angle or flat bar will be allowed. No reinforcement to frame or rad cradle.
23. TRANSMISSION COOLER
Original tranny cooler must remain secured in engine compartment or relocated to directly behind driver’s seat bolted to seat bar and completely covered with a tin shroud. A minimum of two 1” holes must be made in floor directly below the cooler for drainage. Aftermarket fully enclosed tranny coolers maybe mounted in car. Transmission dipstick must be securely fastened, wired down or have an overflow tube pointing straight down away from drivers or spectators.

Hose Specs: 2500psi single braid hydraulic hose with pressed fittings only. Must be rated for 250+ degrees F. Hydraulic hoses must be marked as such by manufacturer. Must have pressed fittings only, no other fittings are acceptable.

24. DISTRIBUTOR
May be protected. Fresh cars must have 1” away from the firewall and cannot extend anymore than 2” past block and cannot cover front of engine. Excessive material will be asked to be removed.
25. SUSPENSION
Suspension must remain stock (movement must occur). Broken or sagging parts may be replaced. It’s required that the rear coil be wired or welded to the differential. No spring blocks or added helpers.
Rear ends can be exchanged (5 bolt pattern car rear ends).

Rear control arms can be changed – Ford/ Mercury 98 & newer 5 control arms, stock material; 98 & older 4 control arms, stock material.
Rear differentials may have weld or bolt on protectors. Gears maybe welded. Steering columns, drive shafts and rear sway arms may be altered but not reinforced. Ball joints, tie rods, control arms and steering linkage must remain stock. NO REINFORCING ALLOWED. No truck rear ends. Must be 5 bolt and No Floaters.

26. HEADERS
Must be secure and can be attached to distributor protector.
27. FRAMES
No pinning or welding of frames. Or stuffed frames. Tilited frames will be aloud you may only weld 3 side of crush box. 6 patches are aloud 4”x 4” x 1/4 inch thick.
28. DRIVETRAIN PROTECTORS
Protectors only be fastened to motor or transmission. NO FASTENING TO FRAME OR BODY.
29. DIFFERENTIAL PROTECTORS
Are permitted and may be welded on. Housing tubes may be welded.
30. MOTOR MOUNTS
Stock motor mounts may be welded or chained. Homemade mounts are acceptable. Any excessive or added mounts will result in disqualification.
31. TRANSMISSION CROSSMEMBER
Must be stock but can be welded in place. NO EXTRA METAL.
32. BODYMOUNTS
Can be ¾” threaded rod, max 3” washers, but MUST HAVE a 1” spacer between body and frame. You may use the original mounts plus 4.
33. TIRES
Tires may be doubled but not loaded. No screwing tires to rim or studding. All wheel weights must be removed. Stem protector are allowed. All season only No snow tires.
34. PRE-BENDING
Cars may be bent within reason. Wedging is allowed but must have a rear window bar. Trunks may be tucked. Wagon roofs may be pre-bent so rear end lifts.

THERE ARE NO GRAY AREAS!!! IF YOU DO NOT FOLLOW THE RULES, YOU ARE ON THE TRAILER!!!

Stock Truck Rules 1/2 ton only

1. FLAMMABLE MATERIALS

Seats & trim - All must be removed from the vehicle except driver’s seat

2. GLASS/AIRBAGS

All windows, mirrors, airbags & trim must be removed prior to inspection

3. TRAILER HITCH

Must be removed and all sharp edges must be hammered down prior to inspection

4. DOORS & NUMBERS

Driver’s door must be PAINTED WHITE

5. FIRE EXTINGUISHER

Must be within reach of the driver and must be in working order.

6. BATTERY

One 12 volt car battery only. Must be moved to passenger side floor and securely fastened in a box/ container clear of all fuel sources. Following inspection it must be covered with a non-flammable shield.

7. GAS TANK

Stock tanks must be removed. Must use a steel marine tank, custom steel tank or certified racing fuel cell. No plastic tanks. All tanks must be securely fastened down (bolted) in the middle of the back seat area. Tank must be covered with a nonflammable material after inspection.

8. FUEL LINES

All fuel lines must have a leak proof fitting with steel or rubber lines. ( no clear lines ) No exceptions. Lines must run inside car.

9. ELECTRIC FUEL PUMP

Must have a safety shut off switch (punch button), marked in red located on roof in center of windshield for officials use.

10. FUEL SYSTEM

Electric fuel pump must be isolated with nonflammable material covering lines, tanks and pump. Non-flammable covering may be fire resistant blanket or airbag material.

11. HOOD

Hoods are not mandatory. (But without a hood you must use electric fan only. Fans directly connected to the motor must be removed)

With a hood - a 12” opening must be cut in the hood directly over the carburetor (not over fan).

Hoods must remain open for official’s inspection.

Hood must be fastened down in a maximum of 6 places with seatbelt strapping , wire, ¼ inch chain or can be bolted to the fender maximum ¾ inch threaded rod.

Hood latch is to be removed prior to inspection.

12. TRUNKS

Trunks/tailgates to be fastened down in same way as hood or may be welded using a maximum of 6- 3” square plates. 12” square or round hole must be cut in top of trunk for inspection.

13. BODY PANELS

Metal may be cut from around wheels for clearance. No bolts may be added.

14. DOOR FASTENING

Driver’s door may be welded solid. All other doors must be fastened shut with wire, straps, ¼ “ chain or spot welded 1” every 12” or 6 -3” square plates welded on per door. Drivers door may have a 12”x72”x1/4” thick plate, bolted 4 times with a maximum of ½ bolt, May extend 6” into fender and 6” beyond door opening. No C channel or angle iron or beveling of plate.

15. WINDSHIELD SPACE

Must have a single steel bar or chain from the cowl to the roof bolted or welded.

16. INTERIOR MODIFICATIONS

No welding of any inside body support seems or firewall seems. All holes in firewall must be covered with a non-flammable material. Large holes in car floors must be repaired with the same gauge metal and securely fastened. No reinforcement. You may add one bar no larger than 4” outside diameter behind the driver’s seat from pillar to pillar, straight across.

17. BUMPERS

Any stock bumper may be used. Bumpers can be seam welded But NOT LOADED! No CUSTOM bumpers. Officials may request a hole be made in bumper for inspection. Bumpers may be mashed in so not to catch on

other cars. Bumpers may be wired or welded on.

18. FRONT GRILL

No screens allowed (Stock A C condensers permitted in original position)

19. RADIATOR

Must be flushed of anti-freeze and replaced with water only. Overflows must point straight down.

No reinforcement to frame or rad cradle.

20. SUSPENSION

Suspension must remain stock (movement must occur). Broken or sagging parts may be replaced with stock parts. It’s required that the rear coil be wired or welded to the differential. No spring blocks or added helper.

21. FRAMES

Must be stock. No welding except where mounting to front or rear bumper.

22. MOTOR MOUNTS

Stock motor mounts may be welded or chained. Any excessive or added mounts will result in disqualification.

23. BODYMOUNTS

Must be stock. If they are rotten they may be replaced with stock size bolts and washers. Up to a ½ inch bolt with 3”x 3” washers.

24. TIRES

. Tires may be doubled but not loaded. No screwing tires to rim or studding. All wheel weights must be removed. NO SNOW TIRES. All season D.O.T approved only.

25. PRE-BENDING

Cars may be bent within reason. Wedging is allowed but must have a rear window bar. Trunks may be tucked. Wagon roofs may be pre-bent so rear end lifts.

26. Rad Craddle or hood

may be wired to bumper Maximum 6 times

27. May have 3x3 washers to secure box max ½ bolt.

28. No weight allowed in box.

29. No cross bracing box.

30. Tailgate may be wired or weld.

31. Fuel Tank in box or between frame rails behind cab. Must have box protection bolted to frame rails.

32. 4 wheel drive trucks must remove drive shaft.

33. Yukon, Tahoe, Suburban, Expedition, Durango allowed.

34. Maximum Of 6 patches on frame 4”x 4” ¼” thick

35 . Drive line may be switched.

36 . No Floater rear ends.

37. Dash bar maximum 4” tube welded or bolted to door post.

38. No Halo Bars.

Rules for 4 and 6 cylinder 108” Wheelbase and Mini Vans