The herby derby will be run as one feature.
General and safety
1. Any American or Foreign production car (coupe, sedan,
station wagon – NO mini-vans or SUV)
2. Maximum FACTORY wheelbase for rear wheel drive or all
wheel drive cars is 108”, maximum wheelbase for front wheel
drive cars is 116”. NO full frame cars. Wheelbase rules will be
STRICTLY ENFORCED. NO altering wheelbases to make
them fit rules.
3. Maximum engine size of 6 cylinders. Rotary engines ok.
Supercharged and turbocharged engines ok. You may use
any engine in any car as long as it meets these rules.
4. No Methanol fuel. Pump gas, race gas, E85 are all
5. Cars must have functional seat belts or aftermarket racing
6. Cars may have onboard fire suppression or fire extinguishers
but must be mounted securely.
7. Cars must have functional brakes that can stop the car in a
8. Driver must wear full face helmet and eye protection. Snell
rated helmets are recommended but not required.
9. Driver must wear fire coat or flame resistant jacket. No shorts.
10. NO careless driving in the pits, keep speed to a minimum
when in pit area.
11. Cars are subject to re-inspection before any prize money is
12. If car does not pass inspection or make it to the arena for
any reason, NO refund of entry fee.
13. If you have a fire, the car will be allowed to continue if the
judges deem it is safe to do so after it is extinguished. 2nd
fire is disqualification.
14. If you are rolled over, the car is done.
15. No driver’s door hits, this could lead to disqualification.
Shielding with the driver’s door may also lead to
16. At any time a judge deems a car is unsafe to continue the
car may be disqualified.
17. Pit gates open at 1:00 PM, All cars must be through tech by
1. All cars must be stock, unless rules state that modification is
2. All interior, glass, plastic, chrome, door handles, door locks
must be removed. Deck in station wagons must be removed.
The dash and gauges may remain in the car as long as it is
3. No split rims, no studded tires, wheel weights must be
removed. Doubled, flaps, valve stem protectors are allowed to
4. Radiators are not required, but if you have a radiator it must
be located in the stock position.
5. The factory fuel tank must be removed; a steel boat tank or
well made steel fuel cell must be placed in the rear seat area
of the car. Maximum size 10 gallon. Fuel tank must be
fastened SECURELY and covered. NO ratchet straps or
plumbers tape for securing fuel tank.
6. No factory plastic tanks at all. You will not run.
7. Electric pumps must turn off with ignition.
8. Place fuel cell behind driver’s seat or in center of car in back
where the back seat was.
9. Transmission coolers are allowed, but must be securely
mounted in a safe place.
10. Batteries must be moved to the passenger side floorboard as
close to center of car as possible. They must be fastened
securely and covered.
11. You must have a number visible from each side of the car.
Roof signs that can be seen for judging are strongly
13. Exhaust may be modified so it exits out the hood.
1. Doors, trunks, and tailgates may be welded solid on the
outside with maximum of 3”wide x3/16” thick straps or smaller
fill material. Alternative: Doors, trunks, tailgates may be
fastened shut with unlimited use of bolts, chains, and wire.
2. Top of doors may be rolled over and welded or bolted with no
3. For driver’s protection, you may weld a bar behind the seat
from door post to door post. The bar may be an X. You may
also have a bar across your dash. You may have a roll bar,
the roll bar must be welted or bolted securely to the floor of
the car and to the roof. No kickers are allowed to back or front
of the car.
4. You may also weld a plate across the driver’s door for safety
not to exceed 6” past either seam.
5. Any automotive bumper and bumper bracket may be used.
Bumper brackets may be welded solid, but only to one side of
the frame. You may use 12” long x 4” wide x 3/8” thick flat
strap as a bumper bracket and this must be welded to the
bumper. You can weld bumper to shocks and shocks to
brackets. Alternatively, you may use square tubing maximum
wall thickness of ¼” that may extend into frame rail maximum
of 8”. You must drill a hole at the back side of this to show the
tubing is no more than 8” long.
6. Bumpers may also be welded directly to the end of the frame.
7. Rear bumper may have 2 straps, chains, or wires (4 loops)
from trunk deck or tailgate to bumper. Front bumper may have
2 straps, chains, or wires (4 loops) going to radiator core
support. Straps can be 3” wide and 3/16” thick and may be
welded onto bumper 5” and trunk/tailgate 5”
8. Rear bumper may be moved up or down, but must be
mounted to the rear frame rails of the car. Rear bumper may
also be removed, if rear bumper is removed, bumper shocks
must also be removed for safety reasons.
9. You may run a shifter through the floor. You may also modify
your stock shifter or cable.
10. You may have a homemade gas pedal/cable. You may also
modify your stock cable.
11. You may rewire the car and use any switches and push
12. Electric fans are allowed even on cars that did not originally
come with them.
1. Hood must have at least a 12-inch square hole cut out in case
of fire. You are allowed 12 extra- 3/8” bolts to bolt your hood
skin back together. You will be allowed 8 hood bolts; you
MUST have at least 4 hood bolts. You may have up to 1” all
thread –2 may be used from the hood down to the frame at
the radiator core support. The top 5” of all thread may be
welded to radiator support. You may run all thread behind
radiator support down to top of frame and be welded to top of
frame with no added material – All thread may pass thru
frame. Hood bolts must be sheet metal to sheet metal. Hood
must be open for inspection. Plates for hood bolts cannot
exceed 5x5x1/2”. Hood bolts can be up to 1” in diameter.
2. Hoods may be moved forward and bent over the radiator, but
60% of hood must remain in original location.
3. Trunk lids may be removed. Trunk lids may be tucked. Rear
sheet metal may be prebent. Rear frames may be notched or
dimpled. Spare tire wells may be modified. NO added metal in
trunk. In addition to previous rules to fasten trunk shut you
may also have either two all-thread, chains, or wire (4 loops)
going through trunk lid to the frame.
4. Trunk lids may be removed and placed on floor of trunk. If
doing this there may still only be two points where the trunk lid
is fastened to the frame. It may have 6 other points that are
sheet metal to sheet metal with maximum bolt size of 1” just
like the hood.
5. Trunk lids need not open for inspection, but if they can’t must
have holes cut for adequate inspection.
1. All body mounts must remain stock with the exception of the
front one, you may run 1″ all-thread from the frame through
the hood straight up and down.
2. Do not weld seam between K-member and unibody.
3. No adding body mounts where one wasn’t originally.
4. Fenders may be trimmed for tire clearance and bolted with
twelve 3/8” bolts per quarter panel or front fender.
5. Body seams may NOT be welded, no welding on car other
then were specified.
7. You must have two bars in front windshield for safety
purposes. Maximum size of 3” wide. Bars must be attached to
dash and roof. If you are running a roll bar these bars may
extend to the roll bar, but must be welded and bolted to the
8. You are allowed 2 spots with 4 loops of wire in each window
opening that may go to floor/frame of the car. In the back
these may be attached to the rear bumper.
1. All suspension and drivetrain components must remain stock.
Engine Cradle/Distributor Protector
1. No engine cradles or transmission braces allowed.
1. No frame shaping allowed.
2. Radiator core supports may be welded to the frame and/or
3. Frames may be shortened, but only from a-arm/strut forward,
radiator core support may be welded back onto the frame, but
with no added metal.
4. Body may be creased and prebent.
5. You may repair rusted areas with metal of same thickness
6. Bent frames may be repaired with 4” x 6” x 3/16” thick metal.
You may only repair the frame once in each place and there
must be a gap of 1” between different patches. If we can tell
the frame was never bent in the first place, metal will be cut
7. Cars with fiberglass hoods, fenders, and trunk lids may
replace those parts with steel parts that came off any car that
would also meet the wheelbase requirements of the class.
8. If you have a pre-ran car that is built to a different set of rules,
please contact judges before bringing it to help you with
clarifications to make modifications to help meet the rules.
9. Anything that is not specifically covered in the rules should be
brought to the judges’ attention prior to the derby, judges
decisions are final.