2003 Late Model Rules and Car Specs
Farley / West Liberty / Dubuque
The average minimum wheelbase is 103 inches. Rear suspension is optional, but no
devices of any kind permitted that are designed to shorten or lengthen the
wheelbase of the car while in competition. (SPRING LOADED CONTROL ARMS NOT
WEIGHT RULES AND OPTIONS: The basic minimum weight limit for
all-competing models will be 2300 pounds after race with driver. All weight
will be required to be in block form of no less than 5 lb. Blocks, and no more
than 50lb. Blocks, and securely bolted to the frame of the car with at least two
7/16” bolts or larger securing each weight. (WEIGHTS WILL NOT BE PERMITTED TO BE
STACKED ON TOP OF EACH OTHER) WEIGHTS WILL NOT BE PERMITTED TO BE MOUNTED ON
REAR BUMPER ANY WEIGHT THAT IS MOUNTED BEHIND THE FUEL CELL WILL BE REQUIRED TO
BE MOUNTED UNDER THE FRAME RAIL. Added weight will not be permitted anywhere
inside the driver's compartment or above interior of the car. No weight
allowed on rear bumper or fuel cell brackets.
ENGINE RULES AND OPTIONS: Only approved V-8 engines permitted.
Aluminum blocks allowed but must have 75lbs mounted in front of bellhousing.
Must also have the weight weighed prior to competing by Official. All engine
combinations must run a 390-CFM Carburetor. No titanium connecting rods or
crankshafts permitted. All engines are subject to cubic inch displacement
inspections at any time on site.
CYLINDER HEADS: Only eligible aluminum or cast iron cylinder heads
permitted. Limit of 2 valves per cylinder. The centerline of the valves cannot
be relocated in relation to the centerline of the cylinder heads and cylinder
block. The General Motors SB2 engine will be eligible and may be used in any
CAMSHAFT: Roller camshafts and roller lifters will be permitted. Any
steel or flat tappet lifter permitted.
ENGINE LOCATION: Any competing model maximum engine set back of six
(6) inches. TO BE MEASURED FROM THE CENTER OF THE FORWARD MOST SPARK PLUG HOLE
TO THE CENTER OF THE UPPER BALL JOINTS. Maximum engine offset is 2 ½"
inches, to be measured from the center of the crankshaft to the center of the
fixed ball joints.
CLUTCH AND TRANSMISSION: High speed multiple disc clutches are permitted.
All cars will be required to be equipped with an operable disengagement
mechanism (Bert or Brinn type). Flywheel will be required to be equipped with a
starter ring and car must have an operational starter. All transmissions will be
required to have both forward and reverse gears in operable condition.
Transmissions will be required to bolt to the rear of the bellhousing, which
will be required to bolt to the rear of the engine. Five (5) speed or automatic
transmissions will not be permitted.
DRIVE SHAFT AND SAFETY HOOP: Drive shaft will be required to be in
similar design to standard production original equipment type. STEEL OR ALUMINUM
PERMITTED. All drive shafts will be required to be painted white. All cars will
be required to be equipped with a hoop around the drive shaft.
CARBURETOR, AIR CLEANER, IGNITION SYSTEM, AND ELECTRICAL SYSTEM: Any
approved carburetor may be used. Approval of carburetor is contingent upon
meeting WRS technical inspection procedures. The carburetor approved for use is
a 4150 series Holley 390 CFM carburetor, body # HP0-80507 will be permitted. The
carburetor venturi must remain standard configuration as manufactured. Fuel
injection will not be permitted. All cars will be required to be equipped with a
round dry element type air cleaner, maximum height four (4) inches, maximum
diameter seventeen (17) inches. All air cleaners are required to have a complete
metal top and bottom. No carburetor air dams or devices permitted to increase
the airflow to the carburetor, either inside or outside of the air cleaner. Any
approved ignition system permitted. NO CRANK TRIGGERED IGNITION SYSTEMS
PERMITTED. No on board computers, automatic electronics, recording devices, of
any kind permitted. Retard or ignition delay devices will not be permitted.
INTAKE MANIFOLDS: Approved aluminum intake manifolds may not be
extensively modified. The inside floor of the plenum and the carburetor-mounting
flange must remain in the stock location as compared to the approved manifold
with the same part #. Approved manufactures' identification in the form of cast
-in part #'s must remain unaltered on the manifold. Carburetor mounting studs
must remain in stock location. Any spacer added to the carburetor-mounting
flange must not be welded to the manifold. The depth of the plenum cannot exceed
a maximum of 6", measured from the gasket surface down to the floor inside the
plenum of the manifold. Any maximum 2" four hole non-tapered or open carburetor
spacer will be permitted as long as plenum depth does not exceed 6".
FUEL CELL / GUARD: Commercially manufactured fuel cell required. Maximum
size of 32 gallons will be permitted. Fuel cell will be required to be encased
in a metal container. All fuel cells must be equipped with a rollover valve in
the vent fitting and in the fuel fill. Fuel cells must be required to have pick
up location on top of cell. It is highly recommended that all fuel cells be
equipped with foam. Fuel cell will be required to be mounted to the frame of the
car. Fuel cell will be required to be secured with straps or tubing around it.
Fuel cell cannot hang below the bottom of the rear end tubes with the car
setting at race height. All cars will be required to be equipped with a fuel
cell guard that is mounted separately from the fuel cell and comes to the bottom
of the fuel cell. Minimum 1 ½" tubing must be used for fuel cell guard. Fuel
cell must be mounted behind the driver's compartment and must have a firewall
between the fuel cell and the driver. Electric fuel pumps will not be permitted.
FUEL: Fuel must be gasoline only. The gasoline shall not be blended with
alcohols, ethers or other oxygenates and it shall not be blended with aniline or
it's derivatives, nitrous compounds or other nitrogen containing compounds. No
icing or cooling of the fuel system is permitted, in the pits or racing area.
REAR AXLES, REAR-END COOLERS, AND REAR TREAD WIDTH: Quick-change rear ends
with spur gears are permitted. Rear end coolers are permitted, but must not be
mounted inside of the driver's compartment. THE REAR TREAD WIDTH CAN BE NO WIDER
THAN THE FRONT WIDTH ON EITHER SIDE OF THE CAR AND IS SUBJECT TO APPROVAL BY
OFFICIALS. EXTENSIVE TRACK WIDTH NOT PERMITTED. CAMBERED REAR- ENDS WILL NOT BE
PERMITTED. No open tube rear-ends permitted.
BRAKES AND SUSPENSION: All cars will be required to be equipped with four
(4) wheel operational brakes. Brake rotors will be required to be made of cast
iron or cast steel; calipers may be made of steel or aluminum. CARBON FIBER OR
CERAMIC BRAKES WILL NOT BE PERMITTED. Center steering will not be permitted.
Straight front axles will not be permitted. Front suspension must be of A-frame
type. Shocks and spring will be required to be securely mounted to the car
frame. Hydraulic or mechanical weight jacks will not be permitted that are
within reach of the driver while sitting in the driver's seat, or while car is
WHEELS AND BEADLOCKS: Steel or aluminum wheels permitted Maximum wheel
width 14". Beadlock permitted. Only foam wheel covers or beadlock / mud plug
combinations will be permitted. No disk wheel covers of any kind permitted.
BATTERIES AND MIRRORS: All cars will be required to be equipped with a
battery. Battery will be required to be mounted in a secure manner. Battery will
be required to be mounted in a safe and secure manner. Mirrors will not be
SAFETY, SEAT BELTS, SEATS, HELMETS, AND WINDOW NETS: All seats
must be made of aluminum or steel and approved by Officials. All seats will be
required to be mounted to the frame or the roll cage of the car. All cars will
be required to be equipped with a minimum 5-point harness. All belts will be
required to be mounted to the frame of the car or to the roll cage. Helmets
should be of full-face shield type and are subject to inspection. All cars
will be required to use a full size window net in the driver's window at all
times. Fire resistant shoes & gloves recommended, Fire proof divers suit
TOW HOOKS AND EXHAUST: All cars will be required to be equipped
with a tow hook (cable 3/8 minimum or chain) both front and rear Rule Will Be
Enforced. Collector type headers are mandatory, and will be required to exit
under the car and extend rearward to a point behind the bellhousing. Headers
must exit under the car and parallel to the ground or may exit left side of car.
All competing models will be required to use mufflers to meet maximum noise
level of 98 DBA at 100 feet.
BODY, REAR SPOILER, ROOF, AND INTERIOR RULES: See diagram of rules sheet
for body rules. Body will be required to be mounted in a professional and neat
manner and is subject to approval by the officials. Window openings will be
required to be wide enough so the driver can get out of either side of the car.
One solid rear spoiler, maximum of eight 8" inches high and seventy-two 72"
inches wide will be permitted. Interior will be required to be made and
installed in a professional and neat manner and is subject to inspection. The
floor pan of the driver's compartment from the drivers seat forward and up a
minimum of 6" in front of driver's feet must be made of one sheet .125 thickness
metal made of aluminum or steel. Two or more sheets put together are NOT
acceptable. All cars will be required to have a firewall between driver and both
the engine compartment and the fuel cell. Roofs may be made of fiberglass, steel
or aluminum, but must meet specifications as set fourth in the rules and must be
approved by track officials. All roof panels must have front mounting posts and
rear roof panels. The rear roof posts must extend to the quarter panel, left and
right side. The front roof posts must be a minimum of one 1" inch wide each. The
rear roof panels must be mounted as per diagrams for the body style each car is
using. Left and right side rear roof panels must be the same length and design.
Rear spoiler braces must be installed as per diagram and may be checked with a
template. The interior of the car may be dropped a maximum of (3) inches below
the top of the doors, but must fasten flush at the top of the doors and taper
towards center of car without any lips. The interior may taper from the rear of
the car down a maximum of (3) inches, but run parallel to the quarter panels for
a minimum of (32) inches from the rear spoiler.
RADIATORS, FANS, WATER PUMPS, OIL RESERVOIRS, AND OIL COOLERS: Only one
(1) radiator will be permitted for the purpose of cooling water and will be
required to be mounted in front of the engine. Oil reservoirs must be mounted in
front of the rear-end housing. Oil reservoirs, oil coolers, or oil lines cannot
be mounted inside of the driver's compartment. Electric water pumps will not be
permitted. Water pump must be mounted in stock location for the make and model
of engine being used. Water pump rotation must be the same as the crankshaft
rotation. All cars must use a stock mounted fan blade that is mounted to the
water pump. Electric fans will not be permitted. Clutch fans will not be
permitted. WINDSHIELD SCREEN, ROLL CAGE, AND FRAME: All cars are required
to have an adequate screen in front of the driver, with a frame and at least
four (4) vertical bars. All cars are required to have an adequate roll cage with
at least three (3) door bars in the driver's door. All cars must have a bar to
reinforce the area around the driver's feet. All competing models must have a
roof bar in the top of the roll cage and a vent window bar in the driver's door.
TIRE RULES: Hoosier 11.0/ 88, 90, 92 - 15 Spec WRS stamped LSB Tire. No
distinguishable lines may be cut or ground in the tires that resemble a sipe.
"THE RULES AND/OR REGULATIONS SET FOURTH
HEREIN ARE DESIGNED TO PROVIDE FOR THE ORDERLY CONDUCT OF RACING EVENTS AND TO
ESTABLISH MINIMUM ACCEPTABLE REQUIREMENTS FOR SUCH EVENTS. THESE RULES SHALL
GOVERN THE CONDITION OF ALL RACING EVENTS, AND, BY PARTICIPATING IN THESE
EVENTS, ALL RACING MEMBERS ARE DEEMED TO HAVE COMPLIED WITH THESE RULES. NO
EXPRESSED OR IMPLIED WARRANTY OR SAFETY SHALL RESULT FROM THIS PUBLICATION OF,
OR COMPLIANCE WITH THESE RULES AND/OR REGULATIONS. THEY ARE INTENDED AS A GUIDE
FOR THE CONDUCT OF THE SPORT AND ARE IN NO WAY A GUARANTEE AGAINST INJURY OR
DEATH TO PARTICIPANTS, SPECTATORS, OR OTHERS."
2003 Late Model Rules and Car Specs.doc - Microsoft Word Document