Sprint Car Rules

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Chassis:
Any 1/10th 2wd Model Sprint Cars. Off-road buggy conversions, home built or otherwise are permitted but they must meet ALL requirements of the rules.

Weight:
Minimum Weight Before & After Race – 1600 grams

Transmission:

Gearbox cars ONLY! No direct drive or solid axles!

Power & Batteries:

Electric Only
7.6V / 2S (Maximum)

Motor & ESC:

Any 540 motor (any 10.5 turn). No motor under 10.5T allowed!
ESC – open and can be ran in any mode.
ESC must be mounted within the cage or side rails.

General Dimensions:

Maximum Overall Length: 18.000″
Maximum Overall Width: 10.250″
Maximum Chassis width: 4.650″

Tires:
Must be 1/10 buggy based wheel and tires on front and rear.
Rubber Tires Only – open tire
No Foams or silicone tires.
Max wheel diameter: Front & Rear: 2.200″
Max wheel width: Front: 1.000″ / Rear: 1.750”
Max tire width: Front: 1.250″ / Rear: 1.850”
Tire Sauce is not allowed

Cage:
Sprint cars must have a scale appearing roll cage. The cage must be symmetrical left to right and mounted level to the chassis. Roll cages not appearing realistic or designed to direct air or create a competitive advantage will not be permitted. All cage and body components such as cage, bumpers, nerf bars, hoods, side panels, tanks, etc. must be mounted on the centerline of the cage. Chassis may not extend outside of the side panels by more than 1/4″ on either side. No Lexan or any other material may be mounted to nerf-bars, bumpers, cage, wing or any other part of the car that will trap, alter, or direct air flow for the purpose of gaining an aerodynamic advantage. Must have appropriate openings on both sides of cage in driver compartment, forward portion of side panels can be no taller than highest point of hood. Additional material may be used/added to either side of the side panel openings to replicate a scale appearing driver but a decal or image of driver must appear on this additional material.

Bumpers:

A flat, curved or tubular front bumper (or combination of) must be utilized and may not be used to direct air or create downforce. Scale appearing side nerf bars must be used on both sides of the car (nitro rules will differ). A scale appearing rear bumper must be utilized at all times. Bumpers and nerf bars must be made of a shock absorbing material.

 
Tail Tank:

A traditional scale appearing rounded style three dimensional rear fuel cell must be used.

 

Nose Area:

A molded or fabricated nose piece may be used and is defined from the front axle forward to the front bumper. Front bumper may not extend more than 3” from front axles. Nose piece (any Lexan) must be at least 3/8″ back from the leading edge of the front bumper. Maximum width of nose piece/bumper is 3.75″ 

 

Hood Area:

A scale appearing hood must be used and is defined as beginning at the front axle and ending at the front of the driver cockpit. The hood must be symmetrical from left to right. The hood must be tall enough and wide enough to allow room for a scale engine intake and air cleaners (no unrealistically low or flat hoods). Nose piece may not extend above the cage down tubes or an imaginary line connecting the down tubes if the cage is a split design. ***Note that the hood and nose piece can be one piece or multiple pieces for the purpose of easy access to electronics and suspension but are defined as above for purposes of aero rules.

Top Wing & Mounts:

Center section and side panels must be made from at least (3) separate pieces of polycarbonate, carbon or aluminum material.
Maximum size of center section of top wing is 7″x7″
Maximum size of center section of front wing is 4.5″x3″
All corners and edges must be rounded and free of sharp edges. Main and Front wings must be mounted so that they are centered on cage, no offset wings. Wing center sections must have all 4 corners set at 90 degree angles, no canted or angled panels.
Wings must also be mounted level from side to side. Center section of wing may not extend beyond leading or trailing edge of side panels.
Top wing maximum height at leading edge: 6.50″ from bottom of chassis.
Side panels must have braces that hold side panel rigid at 90 degrees to center section during race conditions.
Two braces are required from top of the center foil to the left sideboard and one brace is permitted below the center foil to the right side board.
Braces can be a maximum of .750″ wide and front edge of front brace must be no more than 1.5” back from side panel leading edge.
Side Panels may have front, back, top and bottom turnouts of no more than .375″ and are included in max dimension.
Flat foil center sections will be allowed a .250” turndown at the leading edge.
Front wing center section may not extend in front of the front bumper.
Front wing mounts may be made of Lexan but may not exceed 1.75” in length and 1.75” in height and may not extend in front of or behind the center section of the wing.
Top wings are mandatory and front wings are optional for all sprint classes.
See drawing for wing dimensions and clarifications: 7″x7″ Sprint Car Wing Dimensions
See drawing for wing slide dimensions and clarifications: Sprint Car Wing Slide

Front Wing & Mounts:
Center section and side panels must be made from at least (3) separate pieces of polycarbonate, carbon or aluminum material.
Maximum size of center section of front wing is 4.5″x3″
All corners and edges must be rounded and free of sharp edges. Main and Front wings must be mounted so that they are centered on cage, no offset wings. Wing center sections must have all 4 corners set at 90 degree angles, no canted or angled panels.
Wings must also be mounted level from side to side. Center section of wing may not extend beyond leading or trailing edge of side panels.
Side panels must have braces that hold side panel rigid at 90deg. to center section during race conditions.
Side Panels may have front, back, top and bottom turnouts of no more than .375″ and are included in max dimension.
Flat foil center sections will be allowed a .250” turndown at the leading edge.
Front wing center section may not extend in front of the front bumper.
Front wing mounts may be made of Lexan but may not exceed 1.75” in length and 1.75” in height and may not extend in front of or behind the center section of the wing.
Front wings are optional for all sprint classes.