GTA announced Balance of Performance (BoP) for each car to be applied for Round 7 of the 2021 AUTOBACS SUPER GT series, the “MOTEGI GT 300km 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 2021 Round 6 at Autopolis)
■GT500 Class
The re-fueling device supply hose restrictor (internal diameter: 25.0 mm) is the same as those of the previous specifications.
■GT300 Class
The BoP regulations for the GT300 class FIA-GT3 cars have been decide based on consultations between GTA and SRO (organizers of GT3 World Challenge Powered by AWS, etc.).
○GT300
Car | Minimum Weight | Air Restrictor | BoP Weight | Notes |
---|---|---|---|---|
TOYOTA PRIUS #30 | 1200kg | 29.67mm×2 | +50kg | HYBRID Weight: None (not mounted) |
TOYOTA PRIUS #31 | 1200kg | 30.27mm×2 | +50kg | HYBRID Weight: +51.0 kg |
SUBARU BRZ | 1150kg | None | +50kg | *See chart below for boost pressure |
TOYOTA SUPRA | 1200kg | 29.67mm ×2 | +50kg |
*Minimum ground clearance: a 15 mm 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: 27.5 mm) will be adopted.
○GT300 Mother Chassis
Car | Minimum Weight | Air Restrictor | BoP Weight | Notes | |
---|---|---|---|---|---|
TOYOTA 86 MC | 1100kg | 40.00mm x1 | 28.29mm x2 | +70kg | |
LOTUS Evora MC | 1100kg | 40.00mm x1 | 28.29mm x2 | +80kg | BoP Weight of 10 kg is positioned as designated by GTA |
*Minimum ground clearance: a 15 mm 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: 31.2 mm) will be adopted.
○FIA-GT3
Car | Minimum Weight | BoP Weight | Air Restrictor | Notes |
---|---|---|---|---|
HONDA NSX GT3 EVO | 1260kg | +50kg | None | |
Ferrari 488 GT3 2018 | 1260kg | +20kg | None | |
AUDI R8 LMS 2019 | 1235kg | +60kg | 40mm x2 | |
BMW M6 GT3 | 1290kg | +15kg | None | |
Lamborghini HURACAN GT3 2019 | 1230kg | +85kg | 39mm x2 | |
LEXUS RC F GT3 | 1300kg | +10kg | 40mm x2 | |
Mercedes AMG GT GT3 | 1285kg | +45kg | 34.5mm x2 | Lambda Min 0.91 |
NISSAN GT-R NISMO GT3 | 1285kg | +40kg | None | |
Porsche 991 GT3-R | 1235kg | +40kg | 41.5mm x2 |
○Maximum boost pressure
GT300 | FIA-GT3 | |||||
---|---|---|---|---|---|---|
SUBARU BRZ | Ferrari 488 GT3 (new entry car) |
HONDA NSX GT3 |
NISSAN GT-R NISMO GT3 |
BMW M6 GT3 |
||
Engine rpm
[rpm] |
Boost pressure ratio @Lambda | |||||
4000 | 1.47 @0.90 | 1.87 @0.88 | 1.94 @0.88 | 1.78 @0.92 | ||
4250 | 1.49 @0.90 | 1.83 @0.92 | ||||
4500 | 1.51 @0.90 | 1.93 @0.88 | 1.93 @0.88 | 1.86 @0.92 | ||
4750 | 4.11 @0.92 | 1.53 @0.90 | 1.92 @0.92 | |||
5000 | 4.04 @0.92 | 1.55 @0.90 | 1.95 @0.88 | 1.90 @0.88 | 1.94 @0.92 | |
5250 | 3.85 @0.92 | 1.57 @0.90 | 1.96 @0.92 | |||
5500 | 3.64 @0.92 | 1.59 @0.90 | 1.97 @0.88 | 1.85 @0.88 | 1.98 @0.92 | |
5750 | 3.45 @0.92 | 1.60 @0.90 | 1.96 @0.92 | |||
6000 | 3.23 @0.92 | 1.60 @0.90 | 1.99 @0.88 | 1.81 @0.88 | 1.94 @0.92 | |
6250 | 3.06 @0.92 | 1.59 @0.90 | 1.92 @0.92 | |||
6500 | 2.93 @0.92 | 1.58 @0.90 | 2.00 @0.88 | 1.77 @0.88 | 1.78 @0.92 | |
6750 | 2.85 @0.92 | 1.57 @0.90 | 1.66 @0.92 | |||
6900 | 1.75 @0.88 | |||||
>/ 7000 | 2.70 @0.92 | 1.55 @0.90 | 1.98 @0.88 | 1.51 @0.88 | 1.62 @0.92 | |
>/ 7250 | 2.53 @0.92 | 1.49 @0.90 | ||||
>/ 7500 | 2.39 @0.92 | 1.47 @0.90 | 1.94 @0.88 | |||
8000 | 1.30 @0.90 | 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.
4/13-14 | Round1 OKAYAMA | |
5/03-04 | Round2 FUJI | |
6/01-02 | Round3 SUZUKA | |
8/03-04 | Round4 FUJI | |
8/31-9/01 | Round5 SUZUKA | |
9/21-22 | Round6 SUGO | |
10/19-20 | Round7 AUTOPOLIS | |
11/02-03 | Round8 MOTEGI |