Dwarf Car Rules
MyLaps Transponders are required. www.mylaps.com
Fire extinguisher and first aid kits required in haulers.
Please review BHS General Rules for our track's safety requirements.
Neck collars are NOT permitted. Hans or similar neck restraints are required.
Drivers must have at least one year racing experience. Exceptions to experience will be considered upon evaluation of practice performance and driver age.
BODY REQUIREMENTS: Car body will be of 1928 to 1948 vintage coupe or sedan. Will have to be made or produced from 1928 to 1948 coupe, sedan or pick-up.
Will have been a production car. All frames and roll cages, including firewall, doors, and rear section framing, must be fabricated as a single unit frame already forming the actual contour and dimensions of the finished body. Sheet metal, meaning the outside skin, must be permanently attached, riveted, spot welded or fastened no more than 12” between attach points located near the outside perimeter of each panel where it meets the roll cage, firewall, or trunk framing. Skin may not bulge or gap open between any attach points.
No open top cars such as roadsters or convertibles. No convertible bodies with fabricated hard top, or “T” tops.
Must be replica of factory stock body. Must have full roof of metal construction. All roll cage bracing must be left intact permanently (welded). Enter and exit by door only.
No foreign makes, panels, station wagons or woodies. Only closed top, meaning hardtop, American passenger cars and pick-ups. Will be of all metal construction. No fiberglass, plastic, nylon, etc. No aluminum for frames or roll cages. Outer skins shall be a minimum of 26 gauge steel or aluminum of equal durability.
Firewall between engine and manned compartment is mandatory and must be a minimum of .030 sheet metal.
The following are recommended sizes: .032 stainless, .049 sheet metal or .040 aluminum. Must be a complete firewall, front and rear, separating engine and trunk compartment from manned compartment.
No gaps in Firewall larger than 1/8”. No fenders, front or rear. No 1/2 fenders or motorcycle fenders. No structure of any kind to simulate or act as a fender.
Doors and windows must remain in stock appearance and location. Body must be skinned to match its kind (i.e. 3-window coupe must be skinned as a 3 window, not as a 5-window).
Driver side door can be operational to allow passage. Windows and door must be near scale size, shape and location. All doors must be hinged as to open.
No trunk or rear access panel may be 100% removable, such as fastened entirely with fasteners. Must have some means of permanent fastener, such as a safety cable, chain or hinge. All access panels must conform to or match body style.
All inside suspension mounts must be shielded from the driver compartment. No sharp edges or protruding objects shall be allowed inside the driver’s compartment. All cut and free standing edges of the sheet metal must be folded or covered with a molding such as all four edges of the door skin and all of the window openings. This does not include the front and rear edges of the hood or trunk door or the rear access panels. No sharp objects inside or outside of the car. Right and left door must have at least two bars minimum of .065” x .750” OD tubing welded through the midsection of the door frame. The bar supporting the driveshaft
tunnel may count as one of these bars, but only on the driveshaft side.
Door openings must have supports welded to the inside of the front and rear door posts to prevent the door from being pushed into the body upon impact.
Each car will have grill shell and simulated original grill matching its 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 required if simulated radiator is used.
All door latches must be a positive locking device so as not to open from vibration or upset, and must not jam if door is damaged. Latches must be placed high enough on the door so as to be easily reached from the outside of the car.
Hood must be fastened securely by spring latch, bolt and nut or fasteners. No self-tapping screws as on the
rest of the car.
No body shall be over 40” tall from bottom of outer edge to extreme top, including the frame rail. No body shall be over 48” tall from ground up to extreme top. Loaded or unloaded, with or without driver, the car must be within these measurements at all times. No body shall exceed 38” in width, measured at the widest point, usually the rear door post.
Engine compartment must conform to scale of body length and must match contour of body where it meets the right and left side body panels. Firewall or cowling outer skin must be stock appearing in size and shape, only inner panel may be altered.
No glass of any kind will be permitted. A half inch square mesh windscreen is required in place of windshield only.
Plexi-glass will only be permitted for rear quarter window.
No radiator or oil coolers will be mounted in the driver’s compartment or on the rear decks. Functional radiator may be mounted in trunk area. No ventilation holes to any
cooler from the driver’s compartment or rear decks. Any hoses carrying liquid through the driver’s compartment must be completely shielded from the driver by sheet metal and the hose must be of sufficient strength to prevent bursting.
FRAME & ROLL CAGE REQUIREMENTS: All lower frame side rails will be made of 1” x 2” rectangular tubing with a minimum of .120” wall thickness
(lower frame rails on right and left side running from extreme front to extreme rear, does not include cross members).
No round, oval or square tubing in lower side main frame rails. There will be a minimum of three cross members in the manned compartment: one at the forward end, one at the rear and one and the center. The cross members will be made of steel only, with a minimum thickness of .120”. Can be round, square, oval or angle; No aluminum. Roll cage will be 1” or 1½” mild steel tubing of .065” thickness. Floor pan must be welded to main frame and at least 18 gauge steel. Seat pan must be welded to the main frame and be of at least 14 gauge steel.
KICK-OUTS OR NERF BAR REQUIREMENTS: Kick-outs (nerf bars) must be mounted in front of the rear axle only. A maximum length of 42” using a stock not to exceed 1¼”
diameter. Must be mounted a minimum of three places (two lower and one upper), no more than 42” center to center of both lower mounting points, and the upper no more than 18” bottom of frame rail or lowest forward mounting point. The kick-outs will not extend out further
than the wheels. Doors must remain functional and comply with body requirement rules.
FRONT & REAR BUMPER REQUIREMENTS: Front bumpers must be no wider than 36” and will not extend more than 6” forward of front tires. Front and rear bumpers must be at
least 4” off the ground and no more than 14”
above ground (measured from the ground to the top of bumper). Bumpers will be at least 6” high. Rear bumper must be no wider than 50” and will not exceed 6” from extreme rear body panel, or 8” if car has a simulated fuel tank.
SUSPENSION REQUIREMENTS: Front suspension must not exceed tire height or extend rearward past the most forward panel of the firewall, except under frame rail, where it cannot be seen from either side. All steering mechanisms must have safety fasteners, such as cotter pins or self-locking nuts. No rear suspension shall be mounted or extended outside the car’s natural body lines except through rear wheel opening.
Straight axles are not allowed.
Coil-over suspension only. No torsion bars or leaf springs allowed front or rear.
No driver adjustable suspension mechanism in cockpit area or within reach of the driver.
No electric, hydraulic, air or ratchet type of weight jacks allowed.
SHOCKS: Automotive steel hydraulic or gas shocks only. One shock per wheel, four shocks per car maximum. Manual coil adjusters allowed so long as they are not adjustable from cockpit area.
ENGINE REQUIREMENTS: Motorcycle engines only. No snowmobile or other special application engines. Engines must have been built originally by the motorcycle
factory for a production run of 500 or more. Serial numbers must be left unmarked on the engine for date verification. Engine size is limited to a maximum of 1250cc. No blowers or fuel injection allowed unless it was a stock factory item on that engine in which case it must be kept in its original state. Engine must have all parts operational such as the transmission and clutch. Charging systems may be modified or removed.
No air or electric shifters allowed. Manuel shifter only.
Engine must be cooled by the manufacturer’s intent. No added water jackets of any kind. Extra fans or oil coolers are acceptable as long as they don’t distract form the neat appearance of the car. Larger radiators than stock are acceptable as long as they don’t distract from the neat appearance of the car.
Engine must be self-starting by manufacturer’s intent.
All engines must be front mounted in stock location for the model of the car. Engine may not extend more than 12” to either side of car body centerline.
No engine/transmission assembly may extend to rear more than 17” from the front axle line. Engine rear will be determined by the furthest machined surface of the imaginary square of the engine, usually stock cylinder fins for the sides, tappet cover screen for the front, rear of the transmission case for the back. Bolt heads, dowel abutments, transmission drive flanges, alternator cases, point covers and other such protrusions will not serve as measure point. Front axle location will be determined by scaling photograph of car to 73” wheel base and mounting front axle in actual proportion to car body.
HEADER & MUFFLER REQUIREMENTS: Exhaust and headers must be installed as not to distract from a stock appearing hood, with the exception of side panels.
Any hood may be notched, bent or cut in such a manner as not to distract from stock appearance. A muffler good for maintaining 95 DBA or better is recommended.
ELECTRICAL REQUIREMENTS: All batteries must be rear mounted (trunk area). Batteries must be securely mounted with a top restraint (no rubber), restraint must also hold on battery caps. All cars must have one clearly marked master switch. All cars shall be equipped with a manual shut-off safety switch located on the rear exterior of car. The switch must be marked with the words “ON” and “OFF”, and must be wired from the positive side of battery.
FUEL REQUIREMENTS: Only fuels allowed are gasoline, racing fuel, or aviation fuel. No nitrous oxide, no alcohol.
FUEL TANK REQUIREMENTS: Fuel cell/tank not to exceed 5 gallons. Tank must be vented so as not leak fuel in any position, non-leaking cap.Fuel cell must be mounted between frame rails, in trunk. Fuel cell must be mounted with metal straps only, must have complete fire wall between driver and fuel cell. No pressurized fuel system. Manually operated fuel shut-off valve is optional. Off position must be clearly marked and valve handle to be pointed as to be seen easily. Any fuel lines passing through the driver compartment must be steel with sufficient strength to prevent bursting.
DRIVE SYSTEM REQUIREMENTS: Must be shaft driven to automotive type differential. Steel drivelines only. Drivelines must be painted white. Must drive rear wheels only. Drivelines must be enclosed where they pass through the driver’s compartment with sufficient strength to protect the driver in case of failure. Driveline must have at least three 360° degree loops around it. One near each end, and one near the center. Frame members may act as part or all of loop.
BRAKE REQUIREMENTS: Must have brake operating both rear wheels. Front brakes are mandatory. Right front brake may have shut off valve.
WHEELBASE REQUIREMENTS: Wheelbase must be 73” (+ or - ½”). Tire width may not exceed 60” measured from the extreme outside edge of the tire. (Car must be able to pass through a 60” opening. This change must be made asap but no later than April of 2024 prior to the start of the 2024 season). The center of the front and rear axles will be mounted in the center of the body, no off-set hubs front or rear. Off-set rims are legal.
SEAT & STEERING REQUIREMENTS: The bottom of the driver’s seat must be no more than 63” back from the front axle line and the top no more than 68” but may be less if desired. Seat will be safely secured, four places with no less than 3/8” bolts and fender washers are recommended.
All cars must have an approved type of five point racing harness equipped with a quick release buckle and be no more than 2 years old. Both ends must be fastened to the frame of the car with grade 8 bolts or better of not less than 3/8” diameter. All seat belts should be installed at a 45°degree angle to the driver’s hips. Shoulder harness coming from behind the driver should go over both shoulders so that he or
she will be held securely in the seat.
All cars must have an approved quick release, removable steering wheel.
750 cc engines need to weigh a minimum of 1,240 lbs. with driver
999cc and above engines need to weigh a minimum of 1,325 lbs. with driver
There will be a 70-pound limit on ballast. All ballast must be securely bolted or welded inside of body and extend no lower than the frame rails. No ballast will be mounted outside of the body or frame. Ballast must be painted white and have your car number on it.
TRANSPONDERS: MyLaps transponders are required and must be located on the left rear axle tube.
SAFETY GEAR: Seat belts must be 3" wide, 5 point approved racing harness, no more than 2 yrs. old. Helmet (Snell rating of 2000 or better) and approved full face shield required. Approved fire suit mandatory; (NOMEX underwear, head sock, two-layer suit is highly recommended). Arm restraints, “Hans” or similar restraint, and racing gloves must be worn at all times. No neck collars permitted.
Fire extinguisher must be mounted in car.
Fire extinguisher and first aid kits required in all haulers.