MODIFIED COMPACT
Class Designations: MC preceded by car number.
Modified Compact is run on a DYO (dial your own) system and is designed for full-bodied RWD, AWD and FWD sedan style vehicles using 4-cylinder or 5-cylinder engine or 6-cylinder OHC (over head cam) engine or 2-rotor or 3-rotor engines running 9.99 sec or quicker. FWD and AWD cars may utilize a full tube chassis; 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 9.99 sec and quicker as a minimum and meet the Safety requirements for the performance of the vehicle based on the track Sanctioning body. Vehicles that previously raced in Super Mod, Sports Mod, Front Mod, Street FWD, Street RWD and Street AWD and run 9.99 sec and quicker will run in this class. Treaded and slicks tyres permitted.
CLASS REGULATIONS
Engine
Engine: Production based engines only, must be in original position. Engine swaps permitted. Aftermarket blocks or cylinder heads permitted. Replacement cylinder head must bolt to original block, and function, with no modifications. Replacement block must accept original cylinder head, and function, with no Modifications. Dry-sump and crankcase evacuation systems permitted. Maximum of 2 power adders allowed. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Accepted engines: - 4-cylinder (push rod or OHC) Maximum capacity 3.0 Ltr
5-cylinder (push rod or OHC) Maximum capacity 3.0 Ltr
6-cylinder (over head cam only) Maximum capacity 4.0Ltr
2-rotor or 3-rotor
Exhaust: Open exhaust permitted except where prohibited by track rules. All exhaust outlets must terminate below the centre line of the front wheel 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
Front Suspension: Aftermarket control arms permitted and non-OEM mounting points permitted. Must have one working shock absorber/strut per wheel with minimum travel of 25mm and must use original upper mounting point. Strut tower braces, lower tie bars, sway bars, and limit straps are permitted. Any other modifications prohibited. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Rear Suspension: Aftermarket suspension permitted including traction bars/ladder bar devices and four-link suspensions. Must have one working shock absorber/strut per wheel with minimum travel of 25mm. 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: FWD & AWD vehicles may utilize full tube chassis. FWD & AWD vehicles may be converted to RWD. Full chassis cars 8 sec and slower permitted to compete but are not eligible to set records. 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. 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. If OEM dashboard is removed it must be replaced with a fabricated or aftermarket unit. 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
Night 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 9.99 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, clearly visible as required by Sport Compact Group Pty Ltd. Failure to do so will forfeit any prize purse posted and may lead to disqualification. No other event decals permitted.
Tow Vehicles: Permitted. Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Warm Up Procedure: Refer track Sanctioning Body General Regulations - ANDRA or IHRA
Record Setting
The below weights include driver and are only used for Class Record setting. Vehicles DO NOT need to meet these weights for racing in DYO Classes. To be eligible to set a Modified Compact Class Record, vehicles must meet the minimum weights below and all class rules. Only Qualifying, Eliminations and Final round runs can be counted towards ET/MPH records. To set a record, it must be backed up by a second run within 1%. It is the driver’s responsibility to present the vehicle to the scrutineering shed immediately after a run if they feel a record has been set. Failure to do so will forfeit the record. Officials will verify weight after a run if the racer feels they have set a record for that class. The record is only awarded to that driver holding the record at the end of the event.
Minimum Weights only for Class Record setting:
The 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
Minimum Weights:
2 Rotor – 2,000 pounds/ 907.1kgs
3 Rotor – 2,500 pounds/ 1,133.9kg
4/5 Cylinder – 2,000 pounds/ 907.1kgs
6 Cylinder – 2,500 pounds/ 1,133.9kgs
Full tube chassis AWD only - add 75 pounds/ 34kgs
All weights include driver, verified after the run. |
