2008 MODIFIED RULES

ROLL CAGES
(A) Must consist of a continuous hoop of round tube not less than
1.5 inches outside diameter and must a wall thickness of at least .095 inches.
(B) Must be frame mounted in at least six (6) places.
(C) Must consist of a configuration of front and rear hoops connected by tubing
on the sides, or side hoops. Drivers head must not protrude above cage with helmet
on and strapped in driver's seat. Roll cage must be securely supported and braced.
(D) Low carbon, mild steel D.O.M. round tubing is recommended.
No brazing or soldering allowed.
(E) Protection of feet is mandatory.
Bar across back of engine with vertical bars and rub rails, or similar protection.
(F) No brace bars forward of cage may be higher than stock hood height.
(G) Chassis must have drive shaft hoop.
(H) Driver doors must be as parallel with the ground as possible,
and located perpendicular to the driver so as to provide maximum protection for driver,
but without causing undue difficulty in getting into or out of vehicle.
Door bars must be .095 inch thickness.
Must have a minimum of (3) three bars at least 1 1/2 inch in diameter.
Driver door bars must be plated on the outside, with a minimum 1/8 inch steel or aluminum.
Plate must cover the area from the top door bar to the bottom door bar and
from the rear down post to the front down post.
Steel is to be welded, aluminum is to be bolted with a minimum of 3/8 inch diameter bolts.
Plate must be visible for inspection.
(I) The door bars must be welded to the front and rear of the roll cage.
(J) No brazing or soldering allowed on any of the chassis/frame components.
(K) Floor pans with a minimum of 20 gauge steel; or minimum 1/8 inch thick
aluminum plate may be used.

SAFETY EQUIPMENT
(A) Helmets are required and must meet a minimum standard rating of Snell SA2005 or SA2000.
If no sticker is present Hilltop Raceway must assume the helmet does not
meet the required standards and will not be allowed.
Helmet must accompany vehicle at time of inspection.
(B) SFI approved full fire suits of a flame retardant nature must be worn
by all competitors at all times.
Fire suit must be in good operable condition.
Two-piece fire suits are allowed.
Fire retardant gloves, neck braces, and shoes are mandatory.
(C) Fire extinguishers are required.
A minimum of one (1) 2 lb properly mounted (not taped or clamped into car with no means to readily remove it, if needed) hand held style fire extinguisher will be acceptable.
A fire suppression system is still recommended, and these 2 extinguishers
can be used in conjunction with each other, if so desired.
(D) Competition type seat belts required.
Belts must be at least 3 inches in width.
Lap belts, shoulder belts, and submarine belts are required.
No factory type seat belts may be used.
Metal to metal buckles required on shoulder and seat belts.
All belts must be dated no more than three (3) years old.
If not dated, Hilltop Raceway must assume the date has expired and they will not be allowed.
The ONLY recognized date will be the manufactured date as stamped
on the seat belt manufacturers tag.
No sales receipt will be recognized.
(E) Window nets are highly recommended.

TIRES
(A) Any 8 tire allowed
(B) Grooving and / or siping of tires is permitted.

WHEELS
(A) Eight (8) inch steel wheels only. One (1) inch tolerance for bead locks.
(B) Bead locking devices allowed on the right side wheels only.
(C) Mud plugs allowed on the right side wheels only.
Any mud plug other than foam must be securely mounted to the wheel.
Mud plug should include car number.
Hilltop Raceway Official will determine if the mud plug is securely mounted.

FRAMES
(A) Factory production complete, full, 1950 or newer parallel American passenger car frames only.
Frames may be cut in rear only at a point not further than 36"
both sides, from center of rear end housing.
No front clips or tube type allowed.
(B) Frames may not be widened or narrowed and must be able to support roll cage on both sides.
Frame must be full and complete on both sides.
Front cross member may be notched for radiator clearance only.
Minimum frame height , and body height, must be four (4) inches from the ground.
(C) No Jeep, Bronco, or 4-wheel drive frames allowed.
No sports car frames allowed.
No front wheel drive frames allowed.
(D) Minimum wheelbase is 108 , both sides.
NO TOLERANCE.
(E) Maximum overall tread width , front or rear, shall not exceed 78",
measured from outside of tread to outside of tread.

SUSPENSION and STEERING
(A) Front suspension and steering must be O.E.M. and be in stock location,
and must be replaceable by stock part from same type suspension.
Stock passenger car spindles only.
No fabricated spindles.
Aftermarket tube type lower control arms may be used.
Lower control arms cannot be altered or moved,
(exception: may weld shock mount on lower control arm).
May use steel bushings in lower control arms.
(B) Tube type upper control arms are allowed and can be moved.
Cross bar for upper control arm may be aluminum.
(C) No center steering.
In cockpit steering may be modified to drivers taste, but must remain on the left side of car.
(D) No rack and pinion steering.
Steering box must be O.E.M. Steering box
Must remain within original bolt pattern of frame used.
(E) O.E.M. Tie rod ends and adjustment sleeves may be replaced by a minimum
.625 inch (5/8 ) rod end (hiem joint) and steel or aluminum tube.
(F) Rear of frame may be altered to accept leaf or coil springs.
Any coil spring on car must be at least 4 1/2 inches outside diameter.
Coil springs must be steel.
Leaf springs may be steel or composite type.
Lowering blocks, rear spring shackles, and rear end drive bars may be steel or aluminum only.
No torsion bars allowed in rear.
(G) No hydraulic, ratchet, or electric weight jacking devises allowed anywhere in or on the car.
(H) One shock per wheel only ( Dummy shock absorbers are still considered to be a shock). Additional shocks in other locations permissible.
Aluminum shocks are allowed.
No remote reservoir shocks allowed.
(I) No aluminum, fiberglass, or composite suspension, steering, or rear end parts allowed,
except where noted in these rules.
No aluminum hubs allowed.
Front hub & rotor assembly must be one piece steel O.E.M.
(J) Coil over spring / shock units (or combination thereof) allowed on rear suspension only
(this includes lift bar ).
No coil over spring / shock units allowed on front suspension.
(K) No covers on springs, shocks, etc. allowed.
With the exception, of a small bellows type shaft cover for a coil over eliminator and / or pull / push bar assembly, for maintenance purposes only.
Shaft covers are subject to approval, and are subject to removal.

BRAKES
(A) Must have a working caliper and rotor on each wheel and must lock up all four wheels.
(B) Steel O.E.M. brake calipers only. Steel vented brake rotors only;
may not be modified; ie… drilled full of holes, machined down, etc.
Rotors may be re-drilled for different bolt pattern and/or larger studs.

REAR ENDS
(A) Any passenger car type, or truck type rear-end may be used.
(B) Quick change rear ends are optional.

DRIVE SHAFT
(A) Drive shaft must be steel and must be painted white.
(B) Drive shaft loop is required. It must be constructed of 1/4 x 2 steel.
Tubular loop may be used, must be made of a minimum 1 diameter tubing.
Loops must be mounted no less than two (2) inches and no more than six (6) inches
from the rear of the front universal joint of the drive shaft.

TRANSMISSION / BELL HOUSING / CLUTCH
(A) 3 speed, 4 speed manual, and automatic types are allowed.
Aftermarket racing transmissions are allowed as recognized by Hilltop Raceway.
No IN and OUT boxes.
With motor running and car in a still position, driver must be able to engage car
and move forward, then stop and engage car and move backwards.
No type of quick change transmissions allowed.
(B) Transmissions must have at least one forward gear and one reverse gear,
plus a neutral position, and must be able to be shifted by the driver.
(C) O.E.M. type transmissions, with stock type single disc in bell housing, must be
equipped with an explosion proof steel bell housing.
If an explosion proof type bell housing is not available for your engine, or if you prefer,
you may construct a shield of at least 1/2 x 6 steel covering the clutch area 180 degrees,
and be securely fastened.

KILL SWITCH / BATTERY
(A) A kill switch is required.
Switch must be clearly marked and located within easy reach of the driver,
and safety crews must be able to reach switch from standing outside the car.
(B) All cars must have a battery.
Battery must be securely mounted.
Battery cannot be mounted inside drivers compartment.

ENGINES
(A) Any American make may be used.
(B) Rear of engine, bell housing mounting flange surface,
must be mounted at least 72 inches forward from the center line of the rear axle.
(C) Engine offset must be kept within 2 inches of the center line of the front cross member.
(D) Minimum engine height is eleven (11) inches from the ground
to the front center of the crankshaft.
(E) All engines used in competition must be able to be used in a
conventional passenger car without alterations.
(F) Engine cast-in motor mount locations can not be removed or altered.
Castings and fittings must not be altered.
(G) No machine work may be done on the outside of engine,
or on the front or rear of the camshaft.
(H) No dry sump systems are allowed.
Wet system in engine must be operative.
(I) Engine cooling system may be modified.
(J) Engine block must be steel.
(K) Exhaust system must be mounted in such a way as to direct spent gases away
from the cockpit of vehicle, and away from areas of possible fuel spillage.
(L) Battery type ignitions only.
NO magnetos allowed.
Maximum of one (1) ignition system and / or multiple spark discharge box allowed.
An ignition system includes, but is not limited to: multiple spark discharge box, coil, battery, etc.
(M) Mufflers are recommended, and may be required at some track
**All vehicles must have the capability of starting without being pushed or pulled.**

ASPIRATION / FUEL SYSTEM
(A) One 2 barrel, or one 4 barrel carburetor only.
(B) Two (2) carburetor throttle return springs are required.
(C) Engine must be normally aspirated; no type of fuel injection allowed.
(D) No electric fuel pumps or fuel injection systems of any type.
(E) Racing fuel cells are required and must be mounted by at least two steel straps,
no less than two (2) inches wide x 1/8 thick, all the way around the cell.
The use of 1 x 1 x .065 wall sq. tubing is recommended to be used,
and may be required in the future.
Using a minimum of two bars around the top, bottom, and sides of the fuel cell.
All fuel cells must be mounted securely to the frame.
Fuel cells must be enclosed completely in a steel container, mounted behind rear axle only,
and must also be protected in rear by roll cage tubing mounted securely to the frame.
* No part of fuel cell should be lower than the protective tubing.
Protective tubing should be no wider than 6 inches on both sides of fuel cell.
Fuel cells must have check valves, and bladders are highly recommended.
Fuel cells are limited to 32 gallon maximum capacity.
Fuel cells with fuel pickup located in the top of cell ARE MANDATORY.
Fuel cells with a bottom feed pickup are not permitted.
Retrofitting a bottom feed cell will be permissible, but the bottom feed opening must be plugged.
A cap on the exposed bottom fitting will not be acceptable for plugging.
(F) Fuel may be either gasoline or alcohol. NO nitrous oxide. NO additives of any kind.

TRACTION CONTROL
(A) Use of any type of traction control is absolutely forbidden in any event.
in other words, any device, controlled by mechanical, electrical, and / or computer
is considered traction control .
No data gathering or recording devices.
No cockpit or driver controlled ignition timing or fuel delivery devices.
(B) Hilltop Speedway officials may inspect any car they suspect could be benefiting
from the use of traction control devices at any time.
Driver/crew of car called to be inspected are expected to cooperate
(in a sportsman-like manner) with inspector/s; and may be required to jack up car,
remove wheels, panels/covers, and install jack stands to make safe the inspection process.
Failure to cooperate with inspector/s will be considered an indictment of guilt on the competitors part, and competitor will be found in violation of this rule.
No exceptions.
No follow up inspection for this violation.
(C) Hilltop Speedway maintains the right to confiscate any part / s they suspect as
traction control from any car, at any time, for as long as it would be necessary to
determine if said part/s is or is not classified as an illegal traction control device.
If device is found to be legal, device will be returned as soon as practicable to owner.
If part / s are found to be illegal , part/s are sacrificed to Hilltop Speedway.
(D) any Hilltop Speedway competitor (driver) whose car illegal part/s were found shall be found in violation of stated rules and will sacrifice any points accumulated to date that season and shall not be eligible for any point fund and/or contingency money/awards possibly due that season.

BUMPERS / NERF BARS
(A) Bumpers must be used on both the front and rear of car. Bumpers and nerf bars must be steel.
(B) Front bumpers must be mounted to both frame horns.
Front bumper must be made of a min. 1 1/4”; max. 1 1/2” round or square tubing.
Front bumper is required to have two (2) loops, one upper and one lower.
(C) Front bumper may be no wider than the frame horns, with a two (2) inch tolerance only,
to accommodate bumper mounting bracket per side.
(D) Front bumpers must be outside of body and not covered in any way.
(E) Rear bumpers, side nerf bars, and bodies may not extend beyond the width of the rear tires, and must not contain any sharp edges.
There shall be no rough edges on any bar or bumper on the car.
(F) No straight rear bumpers allowed.
The ends of the rear bumper must be bent to form a 180 degree bend,
or be bent forward in a 90 degree bend.
(G) Rear bumpers must mount to rear of chassis.
Rear bumpers may be constructed of round or square tubing, and must protect fuel cell.
(Please note that the bars which are known as “fuel cell” protectors
are not considered part of the rear bumper.
They are however, required as fuel cell protection.
(H) Both front and rear bumpers shall be eighteen (18) inches plus or minus two (2) inches
from the ground. This measurement is to the “center” of the bumper.
This means if your bumper is constructed with it’s two bars, upper and lower, twelve (12) inches apart, then the center or your bumper is six (6) inches from either the top or bottom.
This is where the measurement is taken, at the “center” not the top or the bottom.
(I) Bumpers must be flat across.
Bumpers may not be made in any type of pointed configuration.
A bumper which is badly damaged may be required to be repaired or replaced before car is allowed to compete.

WEIGHTS / CAR WEIGHT
(A) Loose weights must not be used in drivers compartment, or outside the body or hood area.
(B) Any added weights must be securely mounted to the frame or roll cage with at least
two (2) 1/2” bolts, nuts, and washers.
Weights must be painted white and have the car number on it.
(C) Car must weigh 2400 pounds with driver after every race.
Scales being used will be the FINAL determination of weight for car and driver.

CAR NUMBERS
(A) Car numbers must appear on both sides of the car, on the door, or quarter panel,
a minimum of 18 inches tall and nine inches wide, per number.
Number must appear on the top of car a minimum of 24 inches tall and
nine inches wide per number.
(B) The number must also appear on the nose and fuel cell of the car a minimum of 6 inches tall.
Numbers must be a contrasting color to the car.

BODIES
(A) Hoods required to have four (4) hood pins.
(B) No type of “inner fender wells” will be allowed on car.
(C) Any type of sheet metal, or other material, which could be construed by officials
to be affecting the flow of air in ,through, or around the car, other than noted elsewhere in these rules, will not be allowed.
(D) No mirrors allowed.
(E) No type of radio communications are allowed.
(F) All cars must have a top.
(G) Gremlin type tops may be used, but not in conjunction with a rear spoiler.
Spoilers may only be used with conventional style tops.
The determination of whether a car has a rear flip will be the decision of the
Hilltop Raceway official at that event.
(H) Rear spoilers are 8 maximum height and are recommended to be made of transparent material.
(I) Rear roof height cannot exceed front roof height by more than two (2) inches (no tolerance).
**No odd shaped roofs allowed. **
(J) The rear body panel is optional.
If it is used it must meet all other specifications, including size and installations.
(K) The interior of the car must be level with the top of the doors from side to side.
(L) Debris deflector in front of driver is allowed, but may not extend any
farther back than the steering wheel.
(M) The use of drapes and/or covers, at any time, are not allowed.
This includes, but is not limited to, drapes covering the rear of the car, tires, firewall areas etc.
Car covers to keep the interior dry, during towing on open trailers, are not included in this rule. Once any car is unloaded all covers must be removed and remain off
during the duration of the event.

SAFETY EQUIPMENT

SEAT BELTS
a) The use of at least a five point seat belt system including a crotch belt is required.
The system is to be mounted to the frame and not to the floor pan.
The mounts must be run at the same direction, as the belts are intended to secure the driver.
The belt webbing must be protected from any sharp cutouts
in the sheet metal or any other sharp edges.
The date on the belt must not exceed 3 years.
b) Seat belt webbing that comes into contact with any sharp or unradiused metal edge
must be protected from that edge by means of push on grip vinyl trim.
The areas of concern are the webbing slots in the metal racing seats.
All the seat manufacturers either roll the edge or supply the seat with trim
protecting the webbing from abrasion or cutting under impact conditions.
Webbing entry slots into the seat with an existing metal roll of one eighth inch (1/8”)
smooth radius will not require vinyl trim.
c) The areas where the webbing slot has been enlarged
by filing or cutting are of particular concern.
In most instances the edges have been left sharp, increasing the incidence of belt failure.
As racing seat belts are subjected to severe conditions, it is encouraged that worn / frayed
belts are replaced immediately and undamaged belts are replaced every 24 months.
The date sewn into the webbing should be used as a guide.
Damaged belts will also not be permitted.

OTHER
a) There must be no sharp or protruding edges in or around the cockpit,
which would impede the driver’s rapid exit from the car.
b) A headrest (behind the head) with padding is required.
c) A right head net in the absence of a padded right headrest is required.
Head nets must be equipped with quick release mechanisms.
d) There must be a marked electrical kill switch in reach of driver.
e) There must be a marked fuel shut off valve in reach of driver.
f) All drivers must wear a clean one or two piece fire resistent driver’s suit,
quilted or with underwear, head socks, gloves, foot socks and shoes to approved specifications.
g) An undamaged Snell SA95 or newer spec full face helmet is mandatory for all events
including track packing.
h) All crews must carry an operable fire extinguisher of 20 pounds marked with
the car number in 2 inch (2”) numbers / letters in the rear of their transporter,
capable of extinguishing gas and oil fires. For pitside or highway emergencies.
i) Neck collars or similar restraints are suggested.
j) Arm restraints are suggested.
k) Flame retardant seat, roll bar, knee and steering pads or padding are required.
l) Driver’s suits, gloves, shoes and helmets must be presented at Tech inspection.
m) All cars must have an approved fire extinguisher securely mounted within reach of the driver

DISCLAIMER
Hilltop Speedway reserves the right to change and/or alter rules and procedures at any time.
Any variation from these rules will be done in the interest of safety and fair competition.
The rules and/or regulations set forth herein do not express or imply warranty of safety,
from publication of, or, compliance with these rules and/or regulations.
They are intended as a guide for the conduct of the Hilltop Speedway events
and are in no way a guarantee against injury to participants.
These rules and/or regulations will apply to all Hilltop Speedway racing events.
Designated officials of Hilltop Speedway have full authority over racing events.
In the event of any on track dispute the Head Flag man’s decision will be final.
Decisions of Hilltop Speedway officials and promoters pertaining to the interpretation
of rules that affect race procedures, and scoring of positions shall be final.