Round 3: Super GT in Kyushu 300km – BoP Tables

The GT Association (GTA), sanctioning body of the Autobacs Super GT Series, has released the Balance of Performance (BoP) tables for the upcoming third round of the 2017 season at Autopolis circuit, the Super GT in Kyushu 300km.

While the GT300 Balance of Performance will take up most of the changes, the Super GT in Kyushu 300km will also see a significant change for the sole mid-engined GT500 machine, the Honda NSX-GT, which gets a substantial weight decrease for the next round of the championship.

Here are the full list of BoP adjustments for Round 3. Changes from the previous round will be highlighted in GREEN for performance buffs or enhancements, and RED for performance nerfs or detractions.

rd2_428_ext_21_7
© Team Mugen

GT500: 15 kilogram weight break for Honda

For the first time since 2016, the Honda fleet in GT500 will get another significant minimum weight break in an attempt to put the mid-engined NSX-GTs closer to a level playing field with the Lexus LC500 and Nissan GT-R.

The minimum weight of the Honda NSX-GT has been reduced from 1049 kilograms, to 1034 kilograms. It is the lightest that a midship Honda GT500 car has been allowed to run in twenty years.

Honda’s highest-ranked team in the current championship is Team Kunimitsu, who are eighth in the Teams’ Championship, and their drivers Naoki Yamamoto & Takuya Izawa are tenth in the Drivers’ Championship.

16_AR5I4204_s
© Toyota

JAF-GT300 (Original construction)

Vehicle Minimum weight Air restrictor BoP weight Hybrid weight
Toyota Prius #30 1150 kg 28.32 mm x 2 + 15 kg + 73.0 kg
Toyota Prius #31 1150 kg 28.32 mm x 2 + 15 kg + 51.0 kg
Subaru BRZ 1150 kg 42.15 mm x 1 + 30 kg

No changes from Rounds 1 and 2.

17SuperGTOkayama_0129
© Upgarage

JAF-GT300 (Mother Chassis)

Vehicle Minimum weight Air restrictor BoP weight
Toyota 86 MC

Lotus Evora MC

Toyota Mark X MC

1100 kg 40.00 mm x 1 28.29 mm x 2 + 40 kg

No changes from Rounds 1 and 2.

19_AR5I3900_s
© Toyota

FIA GT3

Vehicle Minimum weight Air restrictor BoP weight
Lexus RC F GT3 1300kg 38.0mm x2 +20kg
Audi R8 LMS GT3 1225kg 38.0mm x2 +35kg
BMW M6 GT3 1290kg none +30kg
Lamborghini Huracán GT3 1230kg 38.0mm x2 +40kg
Ferrari 488 GT3 1260kg none +30kg
Mercedes-Benz AMG GT GT3 1285kg 34.5mm x2 +40kg
Porsche 991 GT3-R 1220kg 40.0mm x2 +25kg
Nissan GT-R NISMO GT3 1290kg 40.0mm x2 +20kg
Bentley Continental GT3 1300kg 38.0mm x2 +15kg
Mercedes-Benz SLS AMG GT3 1310kg 38.0mm x2 +15kg

The Lexus RC F GT3 gets a 10 kilogram weight decrease, down from 30kg to 20kg of BoP weight, but the air restrictor diameter has been reduced to 38mm from 40mm.

Eight other GT3 cars get BoP weight increases.

The biggest weight increase is to the Mercedes-AMG GT3s, which gain a whopping 35 kilograms of BoP weight, up from 5kg to 40kg.

The Ferrari 488 GT3, which did not race at Fuji, gets a 25kg weight increase, going from 5kg of BoP weight to 30kg.

The Audi R8 LMS gets a 20kg increase, up from 15kg of BoP weight to 35kg.

The Porsche 911 GT3-Rs get a 15kg increase, up from 10kg of BoP weight to 25kg.

The Lamborghini Huracán GT3s get a 15kg increase as well, up from 25kg to 40kg of BoP weight.

Bentley Continental GT3 also gets a 15kg increase, after having no extra BoP weight at Fuji.

The BMW M6 GT3 gets a 10kg BoP weight increase, going from 20kg to 30kg.

Mercedes-Benz SLS AMG GT3 gets a 5kg increase, up from 10kg to 15kg of BoP weight.

nissan_supergt_fuji500_12-1200x800
© Nissan

FIA GT3 (Maximum Boost Pressure)

Ferrari 488 GT3 BMW M6 GT3
RPM Boost Pressure [mbar]
4000 1470 mbar 1780 mbar
4250 1490 mbar 1780 mbar
4500 1510 mbar 1850 mbar
4750 1530 mbar 1880 mbar
5000 1560 mbar 1910 mbar
5250 1570 mbar 1930 mbar
5500 1580 mbar 1930 mbar
5750 1600 mbar 1930 mbar
6000 1600 mbar 1890 mbar
6250 1600 mbar 1810 mbar
6500 1580 mbar 1710 mbar
6750 1560 mbar 1660 mbar
7000 1540 mbar 1580 mbar
7250 1490 mbar
≥7500 1450 mbar
Nissan GT-R NISMO GT3 Bentley Continental GT3
RPM Boost Pressure [mbar]
4000 2010 mbar 2000 mbar
4500 2000 mbar 1900 mbar
5000 1970 mbar 1800 mbar
5500 1940 mbar 1730 mbar
6000 1920 mbar 1670 mbar
6500 1900 mbar 1570 mbar
≥7000 1870 mbar 1500 mbar

The high-altitude Autopolis circuit will inherently favour the turbocharged GT3 cars. The Nissan GT-R GT3 gets a slight boost increase throughout the powerband at 4500 rpm and above. The Bentley Continental GT3 gets a drastic boost decrease throughout the powerband, and the Ferrari 488 GT3 gets a boost decrease in the middle of the powerband.

The BMW M6 GT3 gets slight boost decreases throughout the powerband, apart from slight increases at 4500-4750 RPM and 6000 RPM.

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