Technical Regulations

All SUPER GT cars are built in line with our Technical Regulations as high-performance racecars outfitted with a full array of safety equipment.
The GT500 class cars from 2020 conform to the technical regulations jointly formulated with DTM.
In the GT300 class, cars conforming to the FIA GT3, GT300 or GT300MC regulation can compete.

Participating Cars

The cars participating in SUPER GT are race-specific cars that take production GT cars or commercially sold sports cars as a base to be modified for racing in line with the FIA and GTA technical (car) regulations. These technical regulations are formulated with concern for safety and environmental friendliness as well as performance.

GT500

Three of Japan’s leading auto makers construct race specific machines of over 500 hp based on their high-performance
production sports cars to supply to teams competing in this class.

GT300

The other class in SUPER GT is the GT300 Class, where not only Japanese cars but a large number of foreign makers’ GT cars participate

GT300 : The GT300 cars heavily modified by the individual teams.
GT300MC : The “Mother Chassis” (GT300 MC) cars adopting unified parts developed and sold by GTA.
FIA GT3 : The FIA GT3 cars manufactured and sold by the car makers as full-fledged race cars.

Monocoque

GT500

The monocoque used in the GT500 class is a carbon monocoque built in Japan according to the regulation jointly formulated with DTM. T

共通モノコック

GT500クラス共通モノコック

GT300

The GT300 class cars use basic chassis designs that conform to the different regulations, but those conforming to the GT300 MC regulation use a specialized carbon monocoque developed by GTA.

Engines

GT500

The GT500 Class machines mount in-line 4-cylinder, 2-liter, direct- injection turbocharged engines that are developed independently by the respective carmakers.

GT300

The GT300 class cars adopting the FIA GT format use the engines developed by the respective carmakers. The GT300 regulation cars can use engines built by the model’s respective carmaker, but if the GTA Mother Chassis is use, the engine is also one supplied by GTA.

Output Restriction

GT500

For the GT500 class, output restriction to even the performance of the cars is done by means of a fuel-flow restrictor to control fuel flow in terms of volume per increment of time, and this technology is also an outgrowth of technological development to improve environmental friendliness.

BoP

燃料流量リストリクター

GT300

In the GT300 class cars, output restriction is done by means of an air restrictor that limits the amount of engine air intake and controlling a turbo boost pressure.

Tires

Race-specific tires are manufactured by each tire manufacturer, and sizes are specified for each class. Each team must register the number of sets specified in the sporting regulations (4 tires per set) and use only the registered set of tires prior to the race. Only one identical set of tires shall be used for the two qualifying sessions and the start of the race. Regulations above do not apply when rain tires are permitted to use

GT500

Front: Maximum width 336 mm, maximum outer diameter 685 mm
Rear: Maximum width356mm、maximum outer diameter712mm

GT300

Maximum width：14inch（355.6mm）、maximum outer diameter：28inch（711.2mm）

GT500: BRIDGESTONE、YOKOHAMA、DUNLOP
GT300: BRIDGESTONE、YOKOHAMA、DUNLOP、MICHELIN

Aerodynamic Parts

GT500

For the GT500 class, the technical regulation is designed to prevent excessive development competition by restricting aerodynamic development and introducing common rear wing parts. For the GT300 class, there are differences in the three regulations, but with regard to the GT300 cars, there is room left for individual development of parts in order to encourage the growth of “Japan Monozukuri” technology.