2013 Dwarf Car Rules
A. There will be no special class of cars; all oval track Dwarf Cars run under the same competition.
B. Car body will be of 1928 to 1948 vintage coupe, sedan, sedan delivery, wagon, or pick-up truck. Must have been a
production car. All frames and roll cages, including firewall, doors, and rear section framing, must be fabricated as a single
frame unit, already forming the actual contour and dimensions of the finished body. Sheet metal outside skins must be
secured with Dzus type fasteners, or permanently attached by rivets or spot weld no more than 12" between each attachment
point located at the perimeter of each panel where it meets the roll cage, firewall, or trunk framing. Skin must not bulge or gap
open between attachment points. Any gap or hole exceeding 3/8" must be covered with sheetmetal, a plug, or permanent type
C. No open top cars such as roadsters or convertibles. No convertible bodies with hard tops or "T" tops. The cars must be
replicas of factory stock bodies. They must have full roof of metal construction. All roll cage bracing must be intact,
permanently welded. Enter and exit by door only. Doors must be functional and driver must be able to exit from either door
D. No foreign makes. Only closed top, meaning hardtop, American passenger cars or trucks.
E. All cars will be of metal construction. No fiberglass, plastic, nylon etc. No aluminum for frame or roll cage. Outer skin shall be
a minimum of 26 gauge steel or .040 aluminum. Firewall between engine and manned compartment is mandatory. There must
be a complete firewall, front and rear separating engine and trunk compartments from manned compartments.
F. No fenders of any type. No structure of any type to simulate or act as a fender. Doors and windows must remain in stock
appearance and location. Body must be skinned to match it's type. (i.e. 3-window couple must be skinned as a 3 window, not
as a 5-window). Right and left doors must be operational and allow passage. Windows and door must be near scale size,
shape and location. All doors must be hinged as to open.
H. Each car will have grill shell and simulated original grill matching it’s body style or a simulated radiator and vertical loop
mounting bar mounted in near stock location and a hood to match radiator size and body style as not to distract from overall
appearance. No grill is required if simulated radiator is used. Functional radiator may be mounted in the trunk area.
I. Engine compartment must conform to scale of body length and must match contour of body where it meets the right and left
side of body panels. Firewall or cowling outer skin must be stock appearance in size and shape; only inner panel may be
Any hood may be notched, bent or cut in such a manner as not to distract from the stock appearance or on car using a
radiator/simulated radiator, hoods may not be altered so as to detract from neat appearance.
Bubble height ( ie: carbs, air cleaners, hood scoop) will be measured from a straight line projected out from the rear most
portion of the hood. The bubble may not exceed 4" above that line and at no place on the hood may the bubble exceed 5". A
tolerance of ½" will apply. There will be no obstruction of the drivers view.
L. At the beginning of race night, all cars must have all body parts intact.
M. No airfoils, wings or streamlining of body.
A. Maximum car height, 48", top to ground.
B. Maximum body width, 38".
C. 40" maximum body height from bottom of frame rail to top of car.
D. The slope of the roof may not exceed 3 1/2" measured from the highest point in the rear just before the main cage starts to
turn downward, to the lowest point just before the main cage starts to turn downward. The slope on the front hood should
remain in proportion to the rest of the body.
3. TIRES and WHEELS
A. Steel wheels only, 13" WHEEL ONLY, 7" maximum width
B. Hoosier D.O.T, 8" wide maximum tread width, 50 durometer reading and/or Hoosier "Mediums" or "RC-3".
C. No softening compounds will be allowed.
D. Hoosier decals must be displayed on both sides of car.
E. Offset wheels are OK.
F. No bead locks.
4. WHEEL BASE
A. Wheel base 73" (1/2" tolerance allowed) measured at the center of the spindle to the center of rear end housing.
B. Outside tire width not to exceed 61" (must be able to pass through 61" opening)
A. Pump gas, aviation fuel, racing gas.
B. No nitrous oxide, no alcohol. NO nitro or proplyene oxide type additives.
6. FUEL CELL
A. Not to exceed 5 gallons.
B. Tank must be vented so as not leak fuel in any position, non leaking cap.
C. Fuel cell must be mounted between frame rails, in trunk.
D. Fuel cell must be mounted with metal straps only.
E. Must have complete fire wall between driver and fuel cell.
7. CARBURATED ENGINES
A. Motorcycle engines only. No snowmobile or other special application engines. 1250cc is the maximum allowable
B. 1250 cc maximum, 4 cycle, 4 cylinders maximum.
C. Must be a regular production (minimum of 500 units per year)
D. Must have working starter, clutch and transmission in place.
E. Charging system optional.
F.. Must be naturally aspirated.
G.. Engine must be cooled by original intent. May use extra fans or oil cooler.
H.. Exhaust and headers must be installed so as not to detract from stock appearing hood, with the exception of side panels.
I.. Muffler are mandatory, 95 dba @ 100'.
J.. No auxiliary starter.
K. This following rules applies to fuel injected motors:
Motor must be 2 years old to be legal. The manufacturer model year will determine the year of the engine. 2007 motor will be
legal for 2008 racing season. 2008 motor will be not be legal until 2010. OEM fuel injection only.Fuel injection may not be
modified in any way from it's original OEM specifications. OEM ignition systems only. No after market fuel injection allowed.
After market boxes that adjust Fuel Curve, Timing and RPM only, are allowed. The only boxes that are approved are the
Dynojet 2,3,3R and 5.The Dobek 2 brothers box is also allowed.The Dyno jet 3 with the USB is allowed with no external
modules plugged in. Any boxes of this type, other than those specified, must be pre-approved by Pit Steward, 30 days prior to
the event. Any car that is discovered to have any other electronic devices other that those outlined above, or who has made
any modifications to these allowed boxes, will be disqualified.Timing retard eliminators and gear position indicators are allowed.
No electronic devices will be allowed in the cockpit area or adjustable by the driver. No other electronic devices that plug into
engine or wiring harness are allowed. Final determination will be made by WSDCA officials.
Engines must have stock bore and stroke with no more than 1 mil. over bore over the original factory specifications for the
engine manufacturer.OEM bore and stroke only. (The 1 mil. over bore is intended for cleanup only, not aftermarket pistons.)
Engines will be checked with a bore and stroke guage and must not exceed manufacturers original cc's for that motor.Stock
Unmodified OEM cylinder heads only.
Cam-shafts must have stock lift and duration, adjustable cam sprockets are allowed.
8. DRIVE TRAIN
A. Must use steel drive shaft from motor to automotive rear end.
B. Drive shaft must have a minimum of 3 360 degree loops. One near each end, one in center. Must be fabricated from a
minimum 3/16" x 1-1/2" steel bar, or 1.00" x .065 steel tubing.
C. No quick change rear ends.
No quick change in the entire drive system, meaning from motor.
Drivelines must be painted white.
9. FRAME and ROLL CAGE
A. Roll cage must be constructed of a minimum 1.25" OD & 1.5" OD x .065 wall tubing in the main roll cage. Secondary
members will be a minimum of 1" OD x .065. wall.
B. All lower frame side rails will be a minimum of 1" x 2" rectangular tubing with a minimum of .120" wall. The lower frame rails
on the right and left side, may be horizontal or vertical, but must remain continuous from extreme front to extreme rear.
Whether laid horizontal or vertical, it must remain that way all through the frame rail. does not include cross member.If frame
rail is cut, it must be gusseted with 1 x 2" .120 wall. No round, oval or square tubing in lower side frame rail.
C. There will be a minimum of three (3) cross members in the main compartment; one at the forward end, one in the center
and one at the rear. The cross members will be made of steel only, with a minimum wall thickness of .120". Cross members
may be round, oval, square or angle.
D. The right and left doors must have a minimum of two bars with a minimum of.065" wall x 1" OD tubing welded through the
midsection of the door frame. The bar supporting the drive shaft tunnel may be included as one of these, only on drive shaft
side. Drive shaft side of car must have one bar, minimum of .065" wall x 1" tubing, welded inside to front and rear door post
E. All cars will have a permanent structure support bar, located behind the seat at approximatley 23" above the frame rail,
extending from side to side. The bottom of the seat will not be more than 63' back, measured from the upper ball joint. The
seat may be tilted back for added driver head clearance, however, no portion of the seat may be back more than 68" as
measured above. A seat pan must be welded in place, using a minimum of 14 gauge steel.
10. ENGINE LOCATION and SET BACK
A. All engines must be front mounted, in stock location for model of car.
B. Engines may not be extended more than 12" to either side of car body center line.
C. Engine set back is the square of the motor (rear fins) may not extend more than 17" from center of front axle. No part of the
engine or transmission may be more than 21" set back, as measures above.
A. Front suspension must not exceed 25" measured from the ground to the highest point of any front suspension, or extend
rearward past the most forward panel of the fire wall, except under frame rail, where it can not be seen from either side.
B. Steering components must have safety fasteners, such as cotter pin or self locking nuts.
C. If steering box is mounted in front cowling, the pitman arm may not extend more than 1 1/2" outside the natural contour of
the body near that point, and must not prevent proper door operation.
D. The center of the front and rear axle will be mounted in the center of the frame from side to side, (1/2" tolerance is allowed).
E.. No Straight axles.
F. No Leaf spring or torsion bars.
G. No Bird Cage type rear linkage or Jacob's ladder.
H. Steel shocks only, one shock per tire. 4 shocks only.
I. Trailing arms, located outside of frame may not extend beyond the rear door post.
A. No car shall weigh under 1,000 pounds without driver. In the event that multiple cars are not meeting the weight
requirement, the accuracy of the scales will be considered by the head tech official.
B. No ballast will be mounted outside of body or frame. All ballast must be securely bolted or welded inside of body or frame
rail and extend no lower than frame rail. Ballast will be painted white and have the car number clearly marked.
13. NERF BARS and BUMPERS
A. Front bumper must be no wider than 36" and will not extend more than 6" forward of front tires.
B. Rear bumper must be no wider than 50" and will not extend more than 6" from extreme rear body panel, or 8" if the car has
a simulated fuel tank.
C. Front and rear bumpers must be a minimum of 4" above the ground, and a maximum of 14". A 2" extension bar may be
allowed on top of the bumper, but must not exceed 16" high from the ground.
D. Bumper will be a minimum of 6" wide vertically.
E. Bumpers are to be made from round tubing .065" minimum, and .095" maximum
F. There will be no sharp points or edges.
G. Nerf bars must be mounted on both sides in front of rear tire and be no more than 18" from center of rear axle to rear of
nerf bar. A minimum of a three (3) point mounting is required. The lower bar must be parallel to lower frame rail from the rear
of the car then curve or bend toward lower frame rail. The upper bar is to attach to the roll cage a maximum of 18" above the
rear attachment point of the lower bar. An additional diagonal brace from frame rail to lower bar is strongly recommended. Nerf
bars must not interfere with the opening of either door and must roll through a 61" opening.
H. These nerfs will be constructed of a minimum of .065" x 1" OD, and a maximum of .095" x 1" OD wall tubing. Lower bars may
not extend more than 1" past the tire tread in rear only. Must roll through 61" opening.
A. All batteries must be rear mounted (trunk area). Batteries must be securely mounted with a top restraint made of metal.
Restraint must also hold battery caps.
B. Cars should have master electrical switch clearly located and marked.
C. No electronic (i.e. computer) traction devices. No electronic or manual devices will be adjustable by the driver during a race.
Any such devices shall be mounted outside the driver’s compartment. Any such devices must be on the approved list from rule
A. DIRT: Must have at least two (2) brakes controlling 2 wheels.
ASPHALT: Must have four (4) wheel brakes.
Brake Bias manual devices are allowed inside the driver compartment.
A. All inside suspension mounts must be shrouded from drive compartment. No sharp edges or protruding objects which could
endanger driver, shall be inside drivers compartment. All cut and free standing edges must be folded, molded or filed smooth
(i.e. window and door edges).
B. All cars must have an approved 5 point racing harness, equipped with a quick release buckle. Both ends of harness must
be attached to the frame of the car with, not less than 3/8" grade 8 bolts. All seat belts will be installed at a 45 degree angle to
the drivers hips. Shoulder harness comes from behind the driver, and will go over both shoulders so that they will be held
securely in the seat. (all safety restraint harnesses will be installed in accordance with manufactures guidelines). Seatbelts
must be replaced or recertified every 2 years.
C. Approved racing type helmet with current snell rating are to be used. (SA-2000).
D. All cars will have a production made quick-release, removable steering wheel.
E. All cars are required to have a fire extinguisher. 5 Lb. Halon on board fire system with a minimum of 2 nozzles installed is
highly recommended. If a portable type fire extinguisher is used, it must be mounted inside the car easily removable by driver
with one hand while in belted position. All pits must have a minimum of a 2 lbs. fire extinguisher accessible in their pits.
F. All drivers must wear an approved driving suit. Single layer fire suit is minimum.
G. All drivers must wear an approved neck brace and fire proof gloves. It is strongly recommend to use a head restraint
device. These devices may become mandatory by the tracks in the future.
H. When racing on asphalt, a catch can for oil and water is required.
I. All door latches must be a positive locking device, so as not to open from vibration or up set, and not to jam if door is
damaged. All hoods and trunks must be securely fastened by, spring latch, nuts and bolts or dzus fasteners (no screws)
J. No glass of any type is permitted. Side windows may have shatterproof Lexan, minimum of 1/16". Front windshield must
have 1/2" square mesh windscreen, or a bar system with a maximum of a 2" opening. A 2" block cannot fit through the opening.
K. No listening or transmitting devices.
L. No rearview mirror of any type.
A. All cars must have numbers in five (5) location: Numbers on right & left door and roof must be a minimum of 12" high, and
the width must be 2/3 of the height, except for the number #1. On the roof, it should be as large as possible. The number on
the rear of the car must be a minimum of 6", and located above the bumper so to be viewed by the driver behind. The
assigned association letter must be a minimum of 6" high on the roof and the doors and 2" high on the rear of the car. A
minimum 2" number and letter must be displayed on the left front upper corner of the windshield. All numbers must be
permanent (ie: vinyl or painted). All numbers should be made to be as large and clear and plain as possible to assist in
B. No Roman numerals, or Gold leaf .
|Dwarf Car Rules