2022 RC Car Racing Rules

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Sprint Car Rules

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.

Street Stock Rules

 

Chassis:

Any factory 2wd buggy based chassis.
Chassis must be original manufacturer kit, no aftermarket, special designed oval type chassis allowed.
No chassis modifications such as (battery offsetting, cutting for weight or etc.)
Added weight must be inside the chassis, not hanging under, or on the sides

No external weight trays allowed
Stock or RPM matched aftermarket parts only
Aluminum Hub carriers are approved for competition front and rear
No aluminum suspension arms or shock towers
May change shock oil, shock pistons and springs
No Sway Bars allowed in front or rear of car


Weight:

Minimum Weight Before & After Race – 1700 grams
Additional weight can be added, no weight tray device is allowed on the chassis, all weight may be stuck inside the chassis and directly to the chassis. Double stacked weight is acceptable.
Added weight can be stuck to the body or mounted to the body with screws, rivets, etc.


Track Width:
Front- 9.875″ – (Outside To Outside, must fit the tech box)
Rear- 9.875″ – (Outside To Outside, must fit the tech box)
Wheelbase
Minimum- 9.000″
Maximum- 11.500″


Shocks & Suspension:

Must be independent
Shocks need to be OEM shock, AE on AE and Traxxas on Traxxas, etc.
Aftermarket springs allowed

Must use factory shock mounting locations, you cannot drill additional holes in the tower, must use OEM hole locations
Limiting of shocks is allowed inside the shock, this is putting plastic washer under the shock piston to limit the shock extending when rebounding.


Transmission & Motor Location:

Motor may be mid or rear engine only
Single Speed Transmissions only
Stock kit transmissions only, No swapping makes of transmissions between cars and manufactures
May use gear or ball differentials
Drivetrain upgrades are allowed
Any spur gear or pinion ration combination is allowed


Motors & ESC:

Any 13.5T (2-pole) ROAR legal sensored motor is allowed
ESC must be ran in “Blinky” mode at all times
No 1/8th scale motors or 550 SCT motors allowed


Batteries:

7.4V or 7.6V Lipo Batteries / MAX Voltage 8.44V
2 cell Lipo
Battery must be in enter of the chassis or in OEM location
No offsetting battery to left side
Any radio system or servo
No AVC, GYRO or additional traction control devices allowed


Body Style:

Molded type bodies only
1/2″ Spoiler is allowed over the stock spoiler. You may have 1/2″ of additional material over the stock spoiler if your body has a built in molded spoiler. It cannot exceed the width of the rear truck and fender area. It cannot stick out past the side of the car.
Spoiler end caps are not allowed
No additional wings, flaps, spoilers, wickers, vents or air devices allowed unless specified above
Decking is not allowed
Body must be cut to trim lines; No cutting out of the back or over the wheel wells
Aftermarket body mounts and bumper allowed but metal bumpers or body parts are not permitted

Tires & Wheels:

Rubber Tires Only

1/10th Buggy Tires Only
No rear tires on the front
Fronts tires must be 2wd buggy tire width.
No 4wd front tires allowed
No 1/8th Tires or Wheels Allowed
No grooving, ghosting or sipping of street stock tires
No 1/10th Stadium Truck Tires Allowed

Tire Sauce is not allowed

Modified Rules

 

CHASSIS
Any 2wd Short Course Truck
Chassis must be OEM Short Course chassis kit
No aftermarket or special designed oval type chassis allowed
4wd chassis allowed, must remove front drive shaft & half-shafts and battery must be in stock location
 
WHEELBASE
Wheel base length 12.75”-13.5”
Width 11”-11.75”


SHOCKS & SUSPENSION
Must be independent
Aftermarket shocks and springs allowed
Adjustable rear control arms are permitted


TRANSMISSION & MOTOR LOCATION
Motor may be mid or rear engine only if original manufacturer designed it to be changed
Single Speed Transmissions only


MOTORS & ESC
540 sized motors only
Any turn brushless / sensored allowed
Any ESC in any mode allowed


BATTERIES
7.4V / 2S Lipos (Maximum). HV packs are allowed but maximum 8.44V at max charge! 
Battery must be mounted down the center of the chassis
Electronics can be mounted on the left within main chassis plate only


BODY STYLE
Must look like a dirt modified
Front wheels must remain open
Rear spoiler allowed, not to exceed 1.5” off of deck
End caps allowed, may run center support brace
End caps no larger than 1.5″x3
No side damns or other down force devices allowed
Max body dimensions: width 13”, height 8”
Max overall length of body including spoiler 26 1/2”
Rear bumpers are required
Front bumper is highly recommended. If no bumper is used, then front nose must not be a sharp/pointy and be able to absorb an impact


TIRES & WHEELS
SC Tires & Wheels Only
Rubber Tires only
No Foams or Silicones Allowed
Wheels must be the 2.2/3.0 SC wheels
Tires must be the 2.2/3.0 SC rubber tires
No 1/8th Tires or Wheels Are Allowed
No grooving or sipping of the rubber tires
No large lug off-road tires.
No 1/10th Stadium Truck or 1/8th buggy wheels allowed
Tire Sauce is not allowed

Late Model Rules

 

CHASSIS
Any 2wd chassis
 
WHEELBASE
Wheel base length 12.75”-13.5”
Width 11”-11.75”


SHOCKS & SUSPENSION
Must be independent
Aftermarket shocks and springs allowed
Adjustable rear control arms are permitted


TRANSMISSION & MOTOR LOCATION
Motor may be in any position
Single Speed Transmissions only


MOTORS & ESC

Any 10.5T (2-pole) ROAR legal sensored motor is allowed
ESC must be ran in “Blinky” mode at all times
No 1/8th scale motors or 550 SCT motors allowed


BATTERIES
7.4V / 2S Lipos (Maximum). HV packs are allowed but maximum 8.44V at max charge! 
Battery must be mounted down the center of the chassis
Electronics can be mounted on the left within main chassis plate only


BODY STYLE
Must look like a dirt late model
Rear spoiler allowed, not to exceed 2.5” off of deck
No side damns or other down force devices allowed
Max overall length of body including spoiler 22"

Maximum rear deck height from bottom of chassis is 4.0"
Rear bumpers are required
Front bumper is required


TIRES & WHEELS
1/10th Buggy tires & wheels only
Rubber tires only
No foams or silicones Allowed
No 1/8th Tires or Wheels Are Allowed
No grooving or sipping of the rubber tires
No large lug off-road tires.
No 1/10th Stadium Truck or 1/8th buggy wheels allowed
Tire Sauce is not allowed