MODIFIED 10.5

Class Designations: MTF preceded by car number.

Modified 10.5 will utilise a Heads Up with a Full Tree start and will race using a Chicago Shootout format for field sizes of 16 to 6 or elimination style for fields over 16.  Tyres must be stamped 10.5 or less on sidewalls. Maximum rear tyre width, regardless of temperature or wear, not to exceed 11.5”. Maximum roll out of 105”.  10.5w tyres that meet the above requirements permitted. 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 2-rotor or 3-rotor engines. Chassis limited to back half modifications.  Maximum of 2 power adders permitted.  All vehicles must have a current Tech Inspection subject to track Sanctioning Body - ANDRA or IHRA and meet Safety requirements for vehicles running 10.99 sec and quicker as a minimum and meet the Safety requirements for the performance of the vehicle based on the track Sanctioning body. Treaded and slicks tyres permitted.

CLASS REGULATIONS

Minimum Weights

 

4 Cyl, 6 Cyl & Rotary (All Combos):
1850 lbs.- 4cyl w/ turbo or nitrous

1950 lbs,- 2 Rotor w/ turbo or nitrous

2150 lbs,- 3 Rotor w/ nitrous
2300 lbs,- 3 Rotor w/ turbo

2200 lbs.- OHC 6cyl up to 3.0Ltr w/ nitrous

2350 lbs.- OHC 6cyl up to 3.0Ltr w/ turbo

2400 lbs.- OHC 6cyl 3.1Ltr to 4.1Ltr w/ nitrous

2550 lbs.- OHC 6cyl 3.1Ltr to 4.1Ltr w/ turbo

 

All weights include driver, verified after the run.  Jamboree reserves the right to amend weights in order to maintain parity in the class.  Ballast permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA

PLEASE NOTE THAT THESE WEIGHTS ARE A STARTING POINT AND WE'LL BE MONITORING THEM AT EACH EVENT TO MAINTAIN PARITY.  

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 terminate below the front wheel arch and be directed to the rear. 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 ¼ 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. One-piece front clips permitted.  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: Racing slicks permitted.  Tyres must be stamped 10.5 or less on sidewalls. Maximum rear tyre width, regardless of temperature or wear, not to exceed 11.5”. Maximum roll out of 105”.  10.5w tyres that meet the above requirements permitted. Retreads or space saver spares prohibited.  Refer track Sanctioning Body General Regulations - ANDRA or IHRA

 

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: Required. 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 track sanctioning body Licence as a minimum. Subject to track sanction requirements.  Refer track Sanctioning Body General Regulations - ANDRA or IHRA

 

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

 

Warm Up Procedure: Refer track Sanctioning Body General Regulations - ANDRA or IHRA