J275
Class Designations: J275 preceded by car number. - Updated 16/02/18
J275 will utilise a Heads Up Pro Tree start and will race using a Chicago Shootout format for field sizes of 32 and under or elimination style for fields over 32. Tyres must be stamped 275 or less on sidewalls and be of radial construction. Must have a metric stamping. A minimum qualifying ET of 9.50 sec is required to compete. It is designed for full-bodied RWD vehicles using 4-cylinder or 5-cylinder engine or 6-cylinder engine or V8 engine or 2-rotor or 3-rotor engines. Chassis limited to back half modifications. Maximum of 2 power adders permitted. All vehicles must have a current relevant ANDRA or IHRA Tech Inspection and meet ANDRA or IHRA Safety requirements for the performance of the vehicle. Subject to track Sanctioning Body. ANDRA track needs ANDRA Licence and Tech. IHRA track needs IHRA Licence & Tech.
CLASS REGULATIONS
Weight breaks are not enforced in this class at this time.
PROPOSED WEIGHT BREAKS FOR FUTURE
Minimum Weights
4 Cyl, 6 Cyl (All Combos):
2200 lbs.- w/ turbo or nitrous up to 2200cc
2300 lbs.- w/ turbo or nitrous 2200cc to 2550cc
2400 lbs.- w/ turbo or nitrous 2550cc to 2850cc
2525 lbs.- w/ turbo or nitrous 2850cc to 3150cc
2625 lbs.- w/ turbo or nitrous 3150cc to 3450cc
2700 lbs.- w/ turbo or nitrous 3450cc and up
2 & 3 Rotor:
2200 lbs,- 2 Rotor w/ turbo or nitrous
2250 lbs,- 3 Rotor w/ nitrous
2500 lbs,- 3 Rotor w/ turbo
V8’s
All Carbureted V8’s must run at least 1 power adder. (i.e. Nitrous, turbocharger or supercharger)
Small Blocks (NA, Nitrous & Supercharged):
2200 lbs.- Small Blocks Naturally Aspirated (EFI ONLY)
2550 lbs.- Small Blocks w/ Nitrous
2850 lbs.- Small Blocks w/ Roots or Supercharger Centrifugal
Big And Small Blocks (Turbocharged ):
3000 lbs.- Small Blocks w/ Single Turbo up to 85mm
3175 lbs.- Small Blocks w/ Single Turbo 85mm up to 105mm
3350 lbs.- Small Blocks w/ Single Turbo 105mm up
3300 lbs.- Big Blocks w/ Single Turbo up to 85mm
3450 lbs.- Big Blocks w/ Single Turbo 85mm up to 105mm
3600 lbs.- Big Blocks w/ Single Turbo 105mm up
3000 lbs.- Small Blocks w/ Twin (up to 64.000mm) Turbos
3175 lbs.- Small Blocks w/ Twin (64.001 - 74.000mm) Turbos
3350 lbs.- Small Blocks w/ Twin (74.001 - 84.000mm) Turbos
3500 lbs.- Small Blocks w/ Twin (84.001 - 95.000mm) Turbos
3300 lbs.- Big Blocks w/ Twin Turbo (up to 64.000mm) Turbos
3450 lbs.- Big Blocks w/ Twin Turbo (64.001 - 74.000mm) Turbos
3600 lbs.- Big Blocks w/ Twin Turbo (74.001 - 84.000mm) Turbos
Big Blocks (NA, Nitrous & Supercharged):
2500 lbs.- Big Blocks Naturally Aspirated up to 650ci (EFI ONLY)
2550 lbs.- Big Blocks Naturally Aspirated 651ci - 700ci (EFI ONLY)
2600 lbs.- Big Blocks Naturally Aspirated 701ci - 750ci (EFI ONLY)
2650 lbs.- Big Blocks Naturally Aspirated 751ci & up (EFI ONLY)
3350 lbs.- Big Blocks w/ Nitrous up to 650ci
3450 lbs.- Big Blocks w/ Nitrous 651ci - 700ci
3550 lbs.- Big Blocks w/ Nitrous 701ci - 750ci
3650 lbs.- Big Blocks w/ Nitrous 751ci & up
3350 lbs.- Big Blocks w/ Roots or Centrifugal Supercharger
Add:
100 lbs. For nitrous with a Turbo or Supercharger.
50lbs. For wheelie bars
100 lbs. For any v8 clutch assisted manual transmission
100 lbs. for non-factory rear suspension (i.e. ladder bars or non factory 4 link)
Deduct:
100 lbs. For single -4 line minimum length of on nitrous combos
50lbs. for leaf springs
100 lbs. For IRS rear suspension
ENGINE
Cooling System: Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Engine: Any automotive type engine permitted. Any engine modification permitted. Maximum of 2 power adders allowed. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Exhaust: Open exhaust permitted except where prohibited by track rules. All exhaust outlets must comply with current track sanctioning Body General Regulations. All turbocharged vehicles without mufflers must have two diffuser bolts through exhaust pipe outlet. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Fuel: Restricted to pump, racing petrol or methanol only. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Fuel System: Replacement fuel cell permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Intercooler: Permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Liquid Overflow: Required. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Lower Engine Containment Device: Required on all piston engine vehicles using power adders quicker than 9.00 sec on the 1/4 mile. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Nitrous Oxide: Permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Turbocharger, Supercharger: Permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
DRIVELINE
Auto Trans/Converters: Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Clutch: Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Driveline: Drive-shaft loop required on all vehicles. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Flywheel: Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Flywheel Shield: Required on all Manual transmission equipped vehicles. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Rear Axle: Spools permitted. All supercharged or Turbocharged vehicles quicker than 7.50 sec are required to use fully floating rear hubs. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Transmissions: Any transmission permitted. Automated, timer-type, electric, electronic, hydraulic, etc. shifting mechanism prohibited, each shift must be a function of the driver and controlled manually. (Driver must pull the lever) Trans brakes permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
BRAKES AND SUSPENSION
Brakes: Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Steering: Aftermarket steering gear permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Suspension: Any type of automotive suspension is permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Wheelie Bars: Permitted. Any adjustability during run prohibited, must be fixed during run. Hydraulics, pneumatics, electronics, etc. prohibited. Wheelie-bar wheels must spin free at the starting line before launch. Any preload prohibited.
BODY AND CHASSIS
Airfoils / Wings / Spoilers: Permitted. Airfoils / Wings / Spoilers may NOT be wider than the widest part of the vehicle body. Any movement or adjustment during a run is prohibited.
Body: Any automotive or light truck body permitted. OEM body must be used with mild customising permitted. Must retain full-bodied size and appearance, with minimum 2 functional doors. Notching of OEM firewall permitted for engine and bell housing clearance. Lightweight bonnet, guards, doors, bumpers and boot permitted only. Maximum front overhang 45 inches (1143mm) measured from front most part of vehicle to the centre of front axle.
Chassis: Limited to back half chassis replacement only from the B pillar back and full roll cage mandatory with bracing from front suspension towers to roll cage permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Wheelbase: Must retain original wheelbase of vehicle plus or minus 3 inch (75mm). Maximum wheelbase variation from left to right is 1 inch (25.4mm).
Windshield/Windows: May be replaced with lexan or plexiglass with a minimum thickness of 3mm.
WHEELS AND TYRES
Tyres:Tyres must be stamped 275 or less on sidewalls and be of radial construction. Tyre limited to a maximum of Pro275, including any radial construction tyre with equal to or less than the dimensions of a Pro275.
Wheels: Must be suitable for street or racing use. Use of temporary replacement wheels or space savers are prohibited. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Interior
Interior: Optional. Minimum of a drivers seat required. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
ELECTRICAL
Batteries: Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Computer: Aftermarket and piggy back computers permitted. Data loggers permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Delay Devices: Not permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Ignition: Aftermarket ignition systems permitted. Rev limiters and two steps permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Light Lighting: Headlights may be painted on. Operational taillight required. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
DRIVER AND SAFETY
Tech Inspection: ANDRA or IHRA tech inspection required. Subject to track sanctioning body. ANDRA tracks require ANDRA tech. IHRA tracks require IHRA tech. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Arm Restraints/Window Nets: Required. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Fire Extinguisher System: Permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Head Protector: Required. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Helmet: Required. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Licence Requirements: Must have ANDRA UDL as a minimum or equivalent IHRA licence. Subject to track sanction requirements. ANDRA tracks require ANDRA UDL. IHRA tracks require IHRA licence. Refer ANDRA or IHRA General Regulations
Neck Collar: Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Parachute: Compulsory on all vehicles exceeding 140 mph (224 kph) Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Protective Clothing: As required for vehicles running 10.99 sec as a minimum. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Safety Belts: Minimum of four-point harness required. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
GENERAL
Sponsor Decals: All racers must display the event and class sponsor decals on both sides of the race vehicle at all times during the event. Decals must be in a prominent location above the height of the wheel arch, clearly visible as required by The Jamboree AUS Pty Ltd. Failure to do so will forfeit any prize purse posted and may lead to disqualification.
Tow Vehicles: Permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
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