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2023.05.19
Balance of Performance (BoP) for Round 3 Suzuka

Balance of Performance (BoP) for Round 3 Suzuka の画像

GTA announced Balance of Performance (BoP) for each car to be applied for Round 3 of the 2023 AUTOBACS SUPER GT series, the SUZUKA GT 450km RACE.
Please note that the contents from the bulletin below are excerpts selected for ease of understanding and they should not be taken as the actually released official bulletin. In case of a need for a precise interpretation, be sure to check the original bulletin.

（Blue underlines: Changes from the 2023 Round 2 at Fuji）

 

 

 

■GT500 Class

The fuel flow restrictor must be fitted in accordance with the SUPER GT Sporting Regulations Art. 23. Success Ballast System. The re-fueling device flow restrictor (internal diameter: 25.0 mm) is also applied. Refer to the end of the section for the mounting positions etc.

 

 

■GT300 Class

The BoP regulations for the GT300 class FIA-GT3 cars have been decide based on consultations between GTA and SRO (organizers of IGTC, GTWC, etc.).

 

○GT300

Car Minimum Weight Air Restrictor BoP Weight Notes
SUBARU BRZ 1200kg None +65kg *See chart below for boost pressure
LEXUS LC500h 1250kg 29.67mm ×2 +70kg BoP weight includes HYBRID Weight
TOYOTA SUPRA 1250kg 29.67mm ×2 +40kg  
TOYOTA GR86 1250kg 29.67mm ×2 +40kg  

＊A fuel supply restrictor device (internal diameter: 33.0mm) will be adopted in accordance with the 2023 JAF National Competition Vehicle Technical Regulations Chapter 3, Art. 10 10.3.2.

＊Minimum ground clearance: a 15mm spacer shall be fitted between the reference plane and the skid block with a thickness of 10mm (±2mm).

＊A re-fueling device supply hose restrictor (internal diameter: 27.5mm) will be adopted.

 

○GT300 Mother Chassis

Car Minimum Weight Air Restrictor BoP Weight Notes
TOYOTA 86 MC 1100kg 40.00mm x1 28.29mm x2 +75kg  

＊A fuel supply restrictor device (internal diameter: 33.0mm) will be adopted in accordance with the 2023 JAF National Competition Vehicle Technical Regulations Chapter 3, Art. 10 10.3.2.

＊Minimum ground clearance: a 15mm spacer shall be fitted between the reference plane and the skid block with a thickness of 10mm (±2mm).

＊A re-fueling device supply hose restrictor (internal diameter: 27.5mm) will be adopted.

＊The fuel capacity carried on-board is limited to 110 liters.

 

○FIA-GT3

Car Minimum Weight BoP Weight Air Restrictor Notes
HONDA NSX GT3 2022 1260kg +50kg None  
Audi R8 LMS 2022 1260kg +40kg 36mm x2  
BMW M4 GT3 1265kg +45kg None  
Lamborghini HURACAN GT3 2019 1230kg +80kg 39mm x2  
Lexus RC F GT3 1300kg +5kg 38mm x2  
Mercedes AMG GT3 2020 1285kg +35kg 34.5mm x2 Lambda Min 0.92
Nissan GT-R NISMO GT3 1285kg +35kg None  
 

 

○Maximum boost pressure

  GT300 FIA-GT3
SUBARU BRZ HONDA
NSX GT3		 NISSAN GT-R
NISMO GT3		 BMW M4 GT3
Engine rpm
[rpm]
 Boost pressure ratio @Lambda
4000   1.87 @0.88 1.90 @0.88 2.33 @1.10
4250       2.38 @1.10
4500   1.91 @0.88 1.87 @0.88 2.44 @1.10
4750 3.95 @0.92     2.47 @1.10
5000 3.88 @0.92 1.93 @0.88 1.83 @0.88 2.50 @1.10
5250 3.70 @0.92     2.54 @1.10
5500 3.56 @0.92 1.95 @0.88 1.77 @0.88 2.58 @1.10
5750 3.38 @0.92     2.62 @1.10
6000 3.16 @0.92 1.97 @0.88 1.74 @0.88 2.66 @1.10
6250 3.00 @0.92     2.70 @1.10
6500 2.81 @0.92 1.99 @0.88 1.71 @0.88 2.61 @1.10
6750 2.74 @0.92     2.51 @1.10
6900     1.67 @0.88  
>/ 7000 2.59 @0.92 1.97 @0.88 1.51 @0.88 2.38 @1.10
>/ 7250 2.43 @0.92     2.23 @1.10
>/ 7500 2.27 @0.92 1.94 @0.88   2.10 @1.10
8000   1.50 @0.88    
8100        

The maximum boost pressure level is calculated by applying the above boost pressure ratio to the standard air pressure announced by GTA.
At each race event, the teams must adjust the maximum boost pressure in accordance with the local air pressure announced by GTA.

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