Arizona Dwarf Cars has the right to change, add, delete or modify any of these rules.
The primary reasons for drafting this rule book are to promote safety, affordability and competitiveness within the Dwarf Car division. We hope that you realize there are very few affordable race cars left. By staying within the scope of this rule book, the Dwarf Car will remain an affordable race car division and we intend to keep it that way.
Officials have the authority to disqualify any entry they believe has violated either the letter or the “spirit and intent” of the rules.


A. 1928-1948 American-made production vehicles only. 5/8 scale two-door sedans, coupes, or pickup trucks.


A. Body must be 5/8 scale, stock appearing, and must follow stock contour. Maximum outside tire width 60". 73 inch wheelbase.
1. Must have grill shell or simulated open radiator matching original body style, any material.
2. Doors, windows, and cowlings must retain stock appearance. Hood louvers allowed for cooling, but must maintain stock contours.
3. Engine compartment must conform to scale and match contour of body.
4. Must have trunk lid or trunk access panel conforming to original body lines.
5. Any item protruding through the hood must not obscure driver's vision; i.e. air boxes, air cleaners, carburetors, bubbles, scoops, etc. Such items shall be limited to 4” maximum height as measured in a straight line forward from the cowl. Hood line must not drop more than 2” from the cowl.
6. No fenders of any kind.
7. No wings or spoilers.

B. Body will be metal construction, 26 gauge steel or .040" aluminum minimum. Fiberglass or plastic grill shells allowed. All exposed edges must be folded or trimmed over. No Legends cars will be allowed.

C. NO open top cars (roadsters, convertibles). No panel trucks, station wagons, or specialty cars, Modlites

D. Dimensions
1. NO car over 48 inches tall, top to ground. Body height maximum 40 inches, bottom edge to top (including frame rail). Maximum outside tire width 60". Must be able to pass through 61” opening.
2. Maximum body width: 38 inches
3. Body contour must be formed by frame and roll cage.
4. Frame ride height must not let car bottom out on track.
E. Doors must be operational and equipped with secure latch and must permit access.
F. Fasteners on hood, trunk, or panels must be positive, locking type.

G. Weight
1. All cars will weigh minimum of 1000# empty (without driver) after race. 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.
2. Added weight must be painted white and be marked with car number. Weight mounted to frame rails must use two 7/16" bolts and double nuts. No weight outside of car body, i.e. on nerf bars.

H. Bumper dimensions
1. Front maximum width 30", maximum height 8". May not be more than 6" forward of front tires.
2. Rear maximum width 50", maximum height 8". May not extend more than 6" behind rear body panels.

I. Firewall must be metal and must completely separate engine compartment from cockpit. Engine protruding into cockpit must be enclosed. Rear metal firewall also mandatory and must completely separate trunk area and cockpit.

J. Wire mesh or Lexan mandatory in windshield area, in addition to protection bars. Lexan highly recommended when running asphalt. No glass. Filling of side or rear windows with Lexan is permitted.

K. Dashboard must be metal. Should have push/pull electrical switch on extreme right hand side, or master electrical switch clearly located and marked. Other switches must be toggle type.

L. Kick-outs must be minimum of 3-point mounted ahead of rear axle. Full length nerf bars between front and rear tires are strongly encouraged from a safety standpoint. May not extend out beyond tread width more than 1" at the rear only.

M. Seat must be high-backed aluminum, racing type. Low back racing seats permitted with mandatory headrest. All cars will have a permanent bar located behind top of seat at shoulder level. Bottom of seat will not be more than 63" back measured from upper ball joint. 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. Seat pan must be welded to the main frame and be of at least 14 gauge steel.

N. Numbers and graphics
1. Car number must be minimum 12" in height and 2" stroke. Must be displayed on each door, roof and trunk. Numbers in 4" size should be on front and rear of car to help with line-ups.
2. The year and make of body style should be displayed in 1 1/2" letters.
3. Car should display engine model and displacement.
4. Car should display mascot/cartoon character.


A. Steel wheels only, minimum wall thickness .090", 13" only. Wheel width maximum 8".

B. Hoosier UDRA, RC-3 and Medium tires, and any DOT approved street tires are legal for all events. Dirt Stockers and Super Dirt Stockers and Goodyear racing tires are not allowed. Tires must durometer at a minimum of 50 (cold).

C. Bead lock rims not allowed.


A. Motorcycle engines, regular production (500+ units) only.

B. Displacement maximum: 1250cc.for carburated motors (+l%). Fuel injected motors must be factory stock (including electronics) Four cycle only, four cylinder maximum.

C. Must have working transmission, clutch, and starter with all parts in place.

D. Charging system optional.

E. NO auxiliary starters.

F. Engines must be front mounted in engine compartment.

G. Engine setback: The “square of the engine” (rear fins of the jugs) may not extend rearward more than 17" from the center of front axle. No part of the engine or transmission may extend rearward more than 21 inches from center of front axle.

H. No fuel injection (except factory OEM), no turbos. No nitro, or nitrous oxide.

I. Engine must be cooled by original intent. May use extra fan or oil cooler. Engine lubrication open.

J. Carburetors and cams open.

K. No aftermarket cylinder heads on injected motors.

L. Engine exhaust must be installed so as to not detract from stock appearing hood. Mufflers recommended. Exhaust must conform to local decibel rulings.

M. No power assisted shifting.


A. 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 cap.

B. Non-fuel leaking cap is mandatory. No pressurized fuel tank. Cell must be vented in such a manner as to not leak fuel in any position. Fuel cell filler necks may not extend beyond either side of body line and must be mounted behind driver, meaning behind the driver’s compartment and inside the outer frame and cage structure. There must be a complete firewall between the driver and fuel cell. Fuel cells must be enclosed in a metal container. The metal must be a minimum of 26 gauge steel or .040” aluminum, and there can be no gaps larger than 1/4” in the container. Any fuel lines passing through the driver’s compartment must be steel with sufficient strength to prevent bursting. Recommended to route fuel lines inside main frame rails.

C. No alcohol or nitrous oxide allowed, gasoline only. Trick gas, Cam 2, and aviation gasoline allowed. Standard commercial pump gas additives allowed, but not to exceed 20%.


A. Must use steel driveshaft from transmission to automotive rear end. Minimum 2.50" x .083" or 2" x .120".

B. No quick change rear ends allowed.

C. Drive shaft must be painted white or dayglo orange.

D. Drive shaft tunnel must have minimum of 2 (3 recommended) 360 degree hoops between firewall and seat back. Must be fabricated of minimum .1875" x 1.5" steel bar. 1.25" x .095" steel tube highly recommended.


A. Main frame members will be minimum of 1" x 2" x .120" wall rectangular steel tubing only. No aluminum allowed in cage or frame.

B. Main frames will have a minimum of 3 cross members between firewall and back of seat fabricated of same material as frame rails. Alternate material may be steel angle, min. .125" x 1.5" x 2". Cross-bracing in floor under driver strongly recommended.

C. Roll cage must be minimum 1.50" x .095" mild steel. From 12/98 on. roll cage can be a minimum of 1.25” x .083” DOM or 1.50” x .095” mild steel. Cross-brace or diagonal strongly recommended in hoop over driver’s head.

D. Rear door post must be minimum 1" x 2" x .120" rectangular steel or structural equivalent.

E. All cars must have cage bars installed across door openings on both sides. Bars should be welded in place as part of roll cage. Minimum size 1" x .065". (1.25" x .095" recommended) Cars with bars mounted on doors should have full door frame and minimum of two horizontal cross bars. Minimum 1.25" x .083". Cars with bars mounted on doors must have 1/4" x 2" steel stops welded in on each side of opening, totaling a minimum of 4" on each end of door. 3/16” x 2” x 3” door stops will be grandfathered in (permitted) on cars built before January 1, 1999.

F. It is required to have a steel bar with a minimum size of 1" x .065" from door post to door post, under the dash. Steel plate on driver’s door bars recommended.

G. It is recommended that, if using rivets, body panels attach to tabs welded onto cage instead of drilling multiple holes into cage bars.

H. No part of the down tube may extend above the hood.


A. Front suspension must not extend rearward past the most forward panel of the firewall. May be hidden under frame rail, out of view from either side.

B. Rear trailing arm/radius rod specifications:
1. Arms located outside frame rails may not extend forward beyond rear door post.
2. Arms located inside frame rail are not restricted in design or length.
3. Torque-absorbing devices are permitted.

C. Wheel offsets are allowed.

D. Hub offsets are NOT allowed. Hubs must be an equal distance from frame rail on both sides of car.

E. Coil-over shocks are the only allowable means of supporting the chassis. One shock and spring per wheel only. Four shocks only.

F. Shocks must be of all-steel construction, non-adjustable type. May not be of a type that allows disassembly.

G. No driver shall have the ability to adjust suspension from inside car.

H. Straight front axles are prohibited.

I. No leaf springs or torsion bars allowed.

J. No bird-cage type rear linkage.

K. Anti-roll (sway) bars permitted, front or rear.

L. No sliding weight jacks.

M. No electronic traction devices will be allowed.


A. All steering components must have safety fasteners such as cotter pins or self-locking nuts.

B. Manufactured quick-release steering wheel hubs mandatory.

C. Rack and pinion steering is recommended.


A. Four wheel brakes recommended for all tracks. May be disc or drum. Rear wheel brakes mandatory on both wheels.

B. Rotors and calipers:
1. Steel OEM rotors and hubs permitted.
2. Steel OEM calipers, Wilwood Dynalite single calipers or equivalent.
3. Aluminum hats and hubs permitted

C. Adjustable brake bias allowed.

D. Competition-type master cylinders allowed.


A. All cars must have an approved type of five-point racing harness, no more than three years old, equipped with a quick-release buckle. Both ends must be fastened to the frame of the car. Must use D rings, or bolts of grade 8 or better of not less than 3/8” diameter. Under no circumstances are bolts inserted through belt webbing acceptable for mounting. All seat belts should be installed at a 45-degree angle to the driver's hips. Shoulder harnesses coming from behind the driver should go over both shoulders so that the driver will be held securely in the seat. All WSDCA-sanctioned events will have a two-year-old rule for all belts.

B. Must use approved racing-type helmets with a Snell rating of 95 or higher, with no physical damage. No exceptions. Full face helmet recommended.

C. All cars are required to have a fire extinguisher mounted inside of the car within easy reach of the driver. It is recommended a minimum 2-lb. fire extinguisher also be kept in each pit. On-board fire system highly recommended.

D. No radiator or oil coolers will be mounted in the driver’s compartment or on the rear decks. No ventilation holes to any cooler from the driver’s compartment or rear decks. Any lines carrying liquid through the driver's compartment must be completely shielded from the driver by sheet metal and be of sufficient strength to prevent bursting.

E. All drivers must wear an approved driving suit. Two layers of protection mandatory; either a two-layer firesuit or a one-layer suit AND Nomex underwear. Also Snell approved helmet with 95 or higher rating. Other required items are fire retardant neck collar, gloves, and shoes. All safety clothing must be in good condition. Arm restraints and/or window nets are highly recommended.

F. An approved type head and neck restraint device (i.e. Hutchens, Hans, D-cellerator, G-force) must be utilized by all drives participating in an ADC event. A three (3) race grace period will be allowed. No exceptions/grace period will be given for events held at Central Arizona Raceway.



The rules and/or regulations set forth herein are designed to provide for the orderly conduct of racing events and to establish the minimum acceptable requirements for such events. These rules shall govern the condition of all events, and, by participating in these events, all participants are deemed to have accepted and complied with these rules. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM PUBLICATION OF OR COMPLIANCE WITH THESE RULES AND REGULATIONS. They are intended solely as a guide for the conduct of the sport and are in no way a guarantee against injury or death to a participant, spectator, or official. Any interpretation or deviation of these rules is left to the discretion of ADC and the decision is final. NO EXPRESSED OR IMPLIED WARRANTY OF SAFETY SHALL RESULT FROM SUCH DEVIATION OF SPECIFICATIONS.



A. All drivers must be minimum of sixteen (16) years of age. (Fifteen [15] years of age if allowed by track with signed waiver by parent or guardian.)

B. Drivers may participate in only three (3) points races before dues must be paid. Any participant refusing to pay dues after the third race will be subject to any or all of the following until said dues are paid: loss of winnings, loss of points, and/or disqualificcation.

C. Upon membership, an approved head and neck restraint device must be used for all races, as set forth in Rule 11-F above.


A. Any injured or suspended driver shall not participate in any event without approval of ADC.

B. Any injured driver will be required to submit to physical examination whenever requested by ADC or safety or track official.


A. No intoxicating spirits or controlled substances are to be consumed before or during race events by anyone entering the pit area of tracks.

B. ADC reserves the right to reject or allow entry of any driver or car.

C. Abuse or confrontation of any racetrack or ADC official and/or use of abusive language is strictly prohibited. FAILURE TO ABIDE BY THIS RULE MAY RESULT IN SUSPENSION, LOSS OF POINTS, WINNINGS, RECORDS, AND/OR CASH FINE.

D. Any disputes involving qualifying times, lap scoring, finishing position, winnings, points, or rules interpretations are to be made by registered car owners or drivers only. Any disputes or discussions of this nature are to be held with ADC officials only. Any member or non-member involving track owner; promoter; tech, track, or safety official in any dispute will subject car and driver to risk of suspension, loss of points, winnings, records, and/or cash fine from ADC.


F. Drivers, owners, and/or crew shall have no claims or actions of any kind against or cause of action for damages of any kind, expenses, or otherwise against ADC, any track owner, promoter, or official by reason of disqualification or damage to either car, driver, or both. This regulation shall be deemed a covenant not to sue made by each driver, owner, and/or crew member to ADC, any track owner, promoter, or official with respect to any alleged act or omission or agreement by any of them.

G. Any car may be inspected by ADC or track officials at any time for safety, mechanical, or rules compliance.

H. Fighting or combative behavior in pits or on track premises at any time is prohibited and subject to suspension and/or fine from ADC or track. This includes actions of driver, owner, or any crew or guests. Anyone leaving their own pit space to confront another driver or crew member will subject their own car and driver to risk of immediate suspension and fine.

I. There will be no dumping of any petroleum products or tires at any track. Most tracks provide containers for used oil and do not accept tires. Violation of this rule can result in suspension from ADC. This rule covers also the general courtesy of not littering. ADC members are encouraged to clean up the litter in their pit space before leaving the track.

J. There will be no stopping on the race track to contest any official’s decision. Anyone stopping could be disqualified from the race. Offenses may result in suspension from ADC.

K. No car may enter any racing event without passing complete technical and safety inspection. Cars passing complete inspection will be marked with ADC designation. Complete inspection can also occur at any time or any track, without notice.

L. Professional conduct is expected from all competitors, crew, and guests at all times at racing events. Participants should behave in a fashion that reflects favorably on ADC as an organized motorsports class association. Disruption and counterproductive behavior will not be tolerated from any driver, owner, crew member, or guests. Failure to adhere to this philosophy can result in fines or suspension for the car, driver, and/or other members.


A. Any eligible, registered driver may drive a registered, qualified car. An eligible driver may transfer to a second qualified car, but must start at the rear of the field.

B. Starting position for heats will generally be decided by pill draw. Finishing order of heats determines feature line-up.

C. Driver must compete in at least one preliminary event (practice, hot laps, qualifying, or heat race) to be eligible to enter feature. ADC has the right to waive this rule under some circumstances.

D. All drivers must be ready to compete in the event for which they are scheduled. Any driver not ready to compete when called may be sent to the rear of the race, or eliminated from that race at the discretion of the track officials.

E. Race may be started at starters discretion once drivers have been notified to be ready. Disposition of cars not in proper position is entirely at the discretion of the track officials.

F. In the event of a mishap on the track and a caution, cars will line up according to their position at the end of the last complete lap. Cars involved in a mishap will go to the rear of the field for the restart. Cars not taking position as directed by track official may be subject to disciplinary action from track or ADC. Track position decision is left to track officials and is final.

G. Issue of rain checks or return of entry/pit fees will be left to track owner/promoter. ADC will use its best efforts to negotiate decision for members’ benefit.

H. Drivers shall receive all race winnings payable unless other arrangements have been made. Driver money will be paid and reported on a 1099 basis.

I. It is understood that the number or order of scheduled events may have to be changed unexpectedly due to track or weather conditions or other extenuating circumstances. ADC will use its best efforts to minimize the effect upon the show and racers.


A. Only protests for alleged violations or infractions of rules, regulations, or specifications as covered in ADC rules are allowed. Protest must be filed with ADC official within 15 minutes of post-race inspection.

B. The scoring, starting, or finishing position in a race IS NOT subject to protest.

C. Any person against whom a protest has been lodged shall have the right to file answers to the charges.

D. Decisions by ADC concerning the outcomes of protests will be final.

E. ADC reserves the right to order the removal of any part and/or equipment illegally used or found during any inspection. Refusal to remove the illegal part may result in suspension for the remainder of the event and loss of all points and money accumulated for that event.

F. Comments, positive or negative, regarding ADC procedures, rules, or actions will be accepted in writing for consideration by ADC. Written comments will be given greater consideration than verbal comments. All written comments must be signed.


Minor infraction not affecting safety or competitiveness (i.e. lettering on car not to rule book standards): allowed to run; no penalty of points or prize money; becomes gross infraction if not corrected before next race night.

Safety related or gross infraction of construction rules found in pre-race tech: not allowed to run on race night until discrepancies are corrected to Tech Inspector’s satisfaction; points not awarded; DNS.

Gross rules or safety infraction found during tech after race (i.e. “big motor”): points not awarded; money not awarded; suspension from participation in association races for a period of up to five races (to be determined by Board of Directors).

Rule protests with Tech Inspector no later than 15 minutes after main event (if car is legal, protester’s money goes to points fund; if car is illegal, money is returned) $30

Engine tear-down with Tech Inspector no later than 10 minutes after main event (if engine is legal, protester’s money is forfeited; if engine is illegal, money is returned) $100

Written conduct protests filed with Tech Inspector or Pit Steward no later than 30 minutes after the main event: answer is due within seven (7) days. All awarded place money from upheld protests must be returned to association points fund before loser of protest can compete in another race.