KidSprint USA Rules 2022

The KidSprint USA will hereafter be referred to as KSUSA.  Questions? Contact Chuck Kidwell 317 507 5968 or chuckkidwell@gmail.com


1.  Age.  Drivers ages 6 through 12 (A driver whose 13th birthday falls during the racing season will be allowed to finish the season in which they began accruing points before their birthday.) may compete in the KidSprint Class.  

2.  Roll cage.  Roll cages shall be at least 1 inch .083 wall thickness mild steel, or 1 inch .065 wall thickness chromoly steel minimum.  The front section of the cage shall be no further back than the steering wheel.  Roll cage shall have sufficient fore and aft bracing and strength to support the weight of the car & driver in case of an upset.  Cage shall have gussets at the intersecting bars to the uprights.  Bends must have at least 3 inch radius.  No square or pointed corners allowed.  Roll cage must be a minimum of 3 ā€œ above the drivers helmet to the top of the cage at any point above the drivers helmet.  It is mandatory to install a cross brace behind the seat to support the shoulder harness at a point not lower than 1 1/2 ā€œ below or above the top of the drivers shoulders.   

3.  Bumpers And Nerfs.  Car must have bumper extending beyond the front and rear tires.  Nothing may extend beyond a tangent line from the outside edge of the tires to the bumpers.  Nothing may extend beyond the outside edge or the tires or wheels, whichever is the widest.  No sharp corners or design as to hook or damage.  All cars must be equipped with nerfing bars.  Nerfing bars must extend to inside edge of tires, but not beyond the outside of tire. 

4.  Safety.  Seat belts must be securely attached to the car and used at all times.  Metal to metal latches only.  5 point seat belts, shoulder harness and sub strap are required.  Belt dates must not be over three years old.  (Example: Oct 99 may be used in 2000, 2001 and 2002.)  Arm restraints are mandatory and must be adequately adjusted to keep the drivers hands below the top of the roll cage.  Helmets must be full head coverage competition type and one of the three latest SNELL approvals.  Nomex headsocks recommended.  All drivers will wear a name brand flame-retardant uniform.  Neck braces and\or cage nets with a SFI 3.2-1 rating or higher or Total Head containment seats are mandatory.  SFI gloves are mandatory for safety.  

5.  Cockpit Controls.  On and off switches must be on dash, top of the cowl or on steering wheel.  On/off switch must be functional.  No radio communication is allowed with the car or the driver.  Cockpit controls:  carb adjusters, kill switch, starter button and engine monitor.  No wing sliders or pan hard adjusters driver operated in cockpits. 

6.  Battery.  All wet cell batteries mounted in the cockpit must be covered and vented outside the cockpit area. 

7.  Fuel.  Methanol will be the ONLY approved fuel at SIR in 2019.  No top-end lube is allowed.  Fuel MUST pass water test.

8.  Weight. Minimum Wing car and driver weight: 400 lbs. Non wing weight minimum weight car and driver is 385 lbs.

9.  Suspension.   Aluminum or steel body shocks are legal.  

10. Wheelbase; Maximum 52 inches. Minimum 50 inches, center of front axle to center of rear axle.    Rear axle to be steel or splined aluminum 1 1/4″ min dia. 

 11. Maximum Tread Width. not to exceed 55ā€ outside of tire to outside of tire.

12.  Steering; Front wheels must be connected by a solid or tubular tie rod. Rear wheel drive only.  All suspension bolts except wheel nuts must be secured by some type of locking device.

13.  Brakes.  Brakes will be of sufficient strength so as to slide the wheels while the car is in motion at any given time.

14.  Tires And Wheels.  Wheels to be 8″ dia steel or aluminum non-beadlock only. Right rear spec tire to be 10 x 8.50 x 8 American Racer (McCreary) or Hoosier RD 20 of comparible size Durometer of 42 reading minimum taken anytime.  There can be no softening the tire in any way. Wheels must be held on with 4 or more standard lug nuts or knock-off hubs. NO CHEMICAL PREP allowed or tolerated. Samples must conform to factory benchmark as performed and tested by Blue Ridge Race Labs. All non conforming samples will result in a 2 race suspension and loss of points and pay from that night.  

15.  Bodies.  All cars must have complete bodies of Sprint Car design only.  Tail sections must be in place for time trials and all races.  There must be a metal firewall between driver and engine, made of 24 gauge steel or .060″ aluminum.  Body of car must be made of aluminum, metal, fiberglass or high impact plastic.  All cars must be painted an attractive color or colors.  No rear view mirrors.  The only part of the car allowed to be dismantled for driver to enter or exit is a quick release steering wheel hub. All mechanically operated devices must be mounted below the drivers shoulders for safety.  All fuel tanks must be equipped with a one-way check valve designed to prevent the spillage of fuel from the fuel tank vent in the event of a rollover.  

16.  Transmission.  The drive will be by engine and\or jackshaft mounted clutches.  No axle mounted clutches allowed. No direct drive will be allowed.  Chain guards will be made of .090 inch thick aluminum or equivalent and will run on top of chain from the front of the front sprocket to the center of the rear axle.  Driver must not be able to touch the chain or sprockets while sitting in the cockpit.  

17.  Wings.  Right side board, maximum 42″ x 20″.  Left side board, 42″ x 20″.  Minimum center section size is 6 sq. ft.  The wing cannot be mounted outside the centerline of the tires.  Side boards may not extend more than 3″ beyond center section and sides must cover center section.  All wings must have 1/16″ radius edges or edging.  No raw edges.  No wood except for ribs or spars inside center section.  Lower front corner of the wings sides cannot be more than 4″ below top of roll cage.  Nose wings cannot exceed 24″x 18″, and must carry car number.  Top wings are mandatory to enter a night’s event except non wing events.  Cars may finish without a wing if no replacement is available.

18.  Numbers.  All cars must have legible numbers painted in contrasting colors on both sides of car and the nose.

19.  Ballast.  Any material used for ballast must be firmly attached as a part of the car’s structure.  No liquid or loose ballast such as water, fuel, oil, sand bags, rocks, log chains etc. allowed.   

20.  Hubs.  Front hubs; Go kart type with 5/8″ bearings and 5/16″ wheel studs minimum.  Rear hubs: 5/16 bolt minimum or splined with safety key. 

21.  Engine Rules.  Briggs & Stratton World Formula engines as defined by the KSUSA engine and FIA Homologation specs.  Engine may or may not be sealed but both versions must pass Tech as defined by the previously mentioned rules upon request of a Track Official.   The Briggs World Formula will use a RLV 5442S header or stock pipe and RLV 4100 silencer as defined in the KSUSA Briggs World Formula rules. Stock pipes may be cut and turned as necessary to fit the race car as long as the pipe still retains the original length, diameters and volume as the original stock pipe.


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