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Japanese Nationals
Queensland Raceway
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Jap Nats 2016

2016 JAP NATS RULES

General Rules:

  1. Nitrous prohibited.
  2. Roll Cages are permitted in all classes.
  3. The same driver must drive the same vehicle for the duration of the event.
  4. The car must be a made by a major Japanese manufacture. Not a kit car or custom race car.

Street Class:

  1. The car must be capable of being road registered. Any car without a registration sticker will be handled on a case-by-case basis.
  2. The tyre tread wear rating must be 140 or above, and must be printed on the tyre.
  3. The tyre must be no wider than 255 and must be printed on the tyre.
  4. The exhaust must be rear exiting with no screamer pipes.
  5. Must have OEM glass. This includes all windows in the car.
  6. Must have OEM doors.
  7. Must have OEM full dash including center console, glove box and lower dash trim.
  8. Additional aftermarket gauges are allowed.
  9. Must have both front seats in the vehicle (after-market seats are allowed).
  10. Must not have in cabin adjustable brake bias or aftermarket pedal box.
  11. Must have the engine as fitted by the manufacture, unless the engine conversion has the same number of cylinders, capacity and configuration as the original engine).
  12. Adding forced induction to a naturally aspirated engine is not allowed.
  13. Changing the boost level or turbo / super charger is allowed. The turbo must remain in the original location with internal waste gate.
  14. Roll cages are permitted.
  15. Boot liner can be removed.
  16. Removal of the back seats is permitted.
  17. Interior of the car can be stripped to allow for the fitment of a roll cage.
  18. No wide body kits, or changes to the shape of the vehicle allowed.
  19. No increased track allowed.
  20. No aftermarket aerodynamic aids such as rear wings, splitters and diffusers. Basic air dams and small canards if part of a body kit molding are acceptable.
  21. No aftermarket sequential shifters, short shifters are acceptable.
  22. No aftermarket sequential race gear boxes allowed.
  23. Stock standard brake calipers front and rear.
  24. Two piece brake rotors are allowed. Aftermarket brake pads are allowed.
  25. Street spec coil over suspension is allowed including units with single damping adjustment.
  26. Race spec coil over suspension with remote reservoirs and / or independent bump-rebound adjustable shock absorbers are not allowed.
  27. Camber, castor, toe adjustment and control arms is allowed.
  28. Springs can be changed.
  29. Manufacture super cars shall be moved into performance class; such as Nissan R35 GTR. These will be on a case by case basis.

Performance Class:

  1. The car must be manufactured by a major manufacture. Not a kit car or custom race car.
  2. The tyres must be Treaded R Compound Semi Slicks. Grooved semi slicks or slicks are not permitted.
  3. The exhaust must be rear exiting with screamer pipes allowed.
  4. Must have OEM front window, rear window and front side door glass.
  5. Must have OEM doors. The door trims and inner door skins can be removed. The structure must remain.
  6. Must have both front seats (aftermarket seats allowed).
  7. Must have basic dash in place. Full aftermarket instruments allowed.
  8. Must have basic interior in the front half of the cabin (removal of carpet, stereo etc and liner allowed).
  9. Must not have in cabin adjustable brake bias. Aftermarket pedal boxes are allowed. Balance bars are allowed on the pedal box. No driver adjustment.
  10. Wide body guards are allowed for wider tyres and bigger brakes, as long as the hubs remain in the original position.
  11. No modification to the structure of the vehicle such as removal of sections of metal from the chassis to reduce weight or for aerodynamic advantage. Removal of front members to fit larger intercoolers and radiators is allowed.
  12. Must have the same suspension geometry as the original manufactured car. Pick up points cannot be moved. Adjustable suspension components are allowed.
  13. Basic aerodynamic aids must adhere to the following rules:
    • Basic air dams are allowed.
    • Only single element rear wings are allowed. Rear wings may be no wider than 100mm per side wider than the widest point of the OEM body (side mirrors excluded).
    • The highest part of the rear wing must be located no higher than 100mm higher than the highest part of the OEM roofline. Except in the case of a hatchback where the wing can be no higher than 250mm from the highest point of the wing to the roofline and must be on the rear portion of the roof.
    • The rear most edge of the rear wing may be located no further back 100mm rearward of the rear most part of the OEM vehicle (exhaust excluded).
    • The maximum permissible chord length of the rear wing is 320mm.
    • Front splitters/under-trays if fitted may project no farther forward than 100mm beyond the adjacent bodywork or the vertical projection of the OEM bodywork and no further back than the rear of the front tyre of the vehicle.
    • The lowest part of the front splitter/under-tray may be no lower than 80mm from the ground.
    • Front canards may extend no further than 100mm from adjacent bodywork or beyond the vertical projection of the OEM body work.
    • Rear diffusers are permitted provided: a) they do not extend beyond the tip of the exhaust or b) they are completely contained within the vertical projection of the original vehicle.

Outright Class:

  1. The car must be manufactured by a major manufacture. Not a kit car or custom race car.
  2. The tyres must be Treaded R Compound Semi Slicks. Grooved semi slicks or slicks are not permitted. See the tyre register for clarification.
  3. The car must still use factory chassis, partial tube frames allowed.

Unrestricted Class:

  1. This class is unrestricted, except as stated in the general Rules.
  2. Any tyres are allowed including full slicks