The goal of the limited classes is to promote the RC racing hobby by allowing racers a chance to compete at a more even and cost-controlled environment. The limited class is not a beginner or sportsman class. The limited racer should have a basic understanding of car setup and a reasonable amount of racing experience to handle the speed and tight racing of the class. It will be a highly competitive class where car setup and driving styles will be the determining factor.

Body
Sprint car style body with a rollcage Maximum Length is 18" . Must have scale appearing cage, hood, side panels, nerf bars, and bumpers. Exhaust headers must appear on both sides of car in "engine area" and be made of round stock or molded polycarbonate (left side of nitro sprint is optional). Rear cage side panels may be used but can not extend beyond cage frame. Maximum front bumper width is 4". No lexan or any other material may be mounted to nerf bars or bumpers that may assist as an aero device.

Roof Wing
Must run top wing. Wing minimum height at leading edge is 4.5" from bottom of chassis.
Max lengths:
Top Surface: square 6.0" x 6.0" plus 1/2" rear spoiler
Right Side: 3.25" x 7" Left Side: 4" x 7"
A 1/4" bend is allowed on top and bottom of wing side panels but is included in max dimensions. A 3/8" max wicker bill is allowed on rear edge of wing side panels.
Amended (6/14/08)
All wings must be constructed of 3 pieces (center section and (2) side boards (not including (2) two supports). Sideboards must be mounted 90 deg to center section of wing. Sideboards must be mounted with a minimum of ½” above or below the wing center section on each side of wing. The minimum ½” must run from front to back of center section of wing. Left side wing panel must have (2) two supports attached to sideboard and center section. Supports must be attached so wing side panel maintains 90 degrees during racing conditions. Supports must be spaced a minimum of 3 ½ ” apart from center of support to center of support. No slots, grooves allowed, allowing wing to “flop” during racing conditions.

Front Wing
No front wing or extra lexan that may act as a front wing.

Wheel Base
(determined where outside of tires touch the surface of the track)
Between 9.5" and 11.5"
Maximum width is 10.25"

Minimum Weight
3.5 lbs. (56 oz.)

Tires
2.0 to 2.2 rubber street treaded or foam tires
All foam tires must be wiped clean of any traction compound before setting the vehicle down on the track or pit lane. Tires will not be allowed to leave tracks on the racing surface or pit lane. One warning will be issued before disqualification for the day.
No mini pins or ribbed tires

Engine
OS .12 TG production engine only.
* No modifications to the stock, out of the box carburetor
* No modifications or additions to the head spacer
* No grinding, cutting, or polishing of the crank or other internal components
* Any marks inside the motor will be ruled on by management and are final
* One stock spacer allowed under the glow plug
* Any replacement parts must be original stock
* Sleeve pinching will be legal to extend the life of the motor
* No additional modifcation to the sleeve will be allowed.
* A pull-start TG can be converted to a non-pull start TG by adding the OS backing plate and grinding off the pull-start tab

Production headers and pipes only with maximum 6 mm diameter single stinger opening. No carbon fiber pipes. Max fuel tank size is 75cc

**Any intentional rule breaking with the engine will result in loss of all current points and you will be ineligible to run any of our limited classes in the future. Management will make the final decision.

Tear Down Procedure:
Management or a limited class racer who raced in the same Main with the subject can request an engine tear down. Management retains the right to deny a tear down. The source requesting the tear down must put up $20 for the subject's time and materials. The subject will tear down his own motor after the class's A-Main in front of track tech officials using his own tools. Only management, tech officials, the subject, and the person requesting the tear down will be present during the procedure. The vehicle may be impounded until the engine can be torn down. If the engine is found to be in violation of the engine rules or the subject rejects the request, the $20 tear down fee will be returned to the source and the above rule breaking consequences will be followed.