The GT Association (GTA), promoter and sanctioning body of the Autobacs Super GT Series, released the Balance of Performance (BoP) tables for the upcoming second round of the season, the Fuji GT 500km Race at Fuji Speedway.

The Balance of Performance for the GT300 class is administered by the GTA in association with the Stéphane Ratel Organisation (SRO) for the FIA GT3 category cars, with all other BoP adjustments handled by the GTA.

Positive changes such as boost increases and weight reductions will be highlighted in GREEN. Negative changes such as weight increases and boost reductions will be highlighted in RED.

JAF-GT300

Vehicle Minimum Weight Air restrictor BoP weight Notes Toyota Prius 1150 kg 28.70 mm x 2 + 0 kg Hybrid Weight: + 51 kg Subaru BRZ 1150 kg 45.00 mm x 1 + 0 kg

No changes from Round 1.

JAF-GT300 Mother Chassis

vehicle Minimum Weight Air restrictor BoP weight Notes Toyota 86 MC Lotus Evora MC Toyota Mark X MC 1100 kg 40.00 mm x 1 28.29 mm x 2 + 20 kg

No changes from Round 1.

FIA GT3

Vehicle Minimum Weight BoP weight Air restrictor Notes Nissan GT-R NISMO GT3 (2018) 1285 kg +15 kg None BMW M6 GT3 1290 kg +20 kg None Porsche 991 GT3-R 1225 kg +30 kg 41.5 mm x 2 Honda NSX GT3 1240 kg +40 kg None Lexus RC F GT3 1300 kg +5 kg 38.0 mm x 2 Mercedes-AMG GT3 1285 kg +20 kg 34.5 mm x 2 Lamborghini Huracán GT3 1230 kg +55 kg 39.0 mm x 2 Audi R8 LMS GT3 1225 kg +40 kg 39.0 mm x 2 Bentley Continental GT3 1300 kg + 0 kg 38.0 mm x 2 Nissan GT-R NISMO GT3 (2015) 1290 kg +20 kg 40.0 mm x 2

Seven of the ten active GT3 models received a weight cut from Round 1.

The biggest weight reduction goes to the Honda NSX GT3, which drops 20kg of BoP weight for Fuji. The BMW M6 GT3 and Lexus RC F GT3 drop another 15kg. The Mercedes-AMG GT3 drops 10kg, and the Audi R8, Lamborghini Huracán, and Porsche 911 GT3-R drop 5kg each.

The 2018 Nissan GT-R gains an additional 5 kg in ballast weight, and the 2015 GT-R gains another 10kg.

Maximum Boost Pressure

JAF-GT300 FIA-GT3 2018 SUBARU BRZ NISSAN GT-R

NISMO GT3 BMW M6 GT3 Engine Speed

[rpm] Boost Pressure[mbar] 4000 1930 mbar 1780 mbar 4250 1830 mbar 4500 1920 mbar 1860 mbar 4750 4110 mbar 1880 mbar 5000 4040 mbar 1900 mbar 1920 mbar 5250 3850 mbar 1940 mbar 5500 3640 mbar 1890 mbar 1950 mbar 5750 3450 mbar 1940 mbar 6000 3230 mbar 1850 mbar 1880 mbar 6250 3060 mbar 1830 mbar 6500 2930 mbar 1830 mbar 1730 mbar 6750 2850 mbar 1660 mbar 6900 1810 mbar >/ 7000 2700 mbar 1510 mbar 1650 mbar >/ 7250 2530 mbar >/ 7500 2390 mbar –

FIA-GT3 2017 FIA-GT3 2016 FIA-GT3 2015 HONDA

NSX GT3 Bentley

Continental GT3 NISSAN GT-R

NISMO GT3 Engine Speed

[rpm] Boost Pressure [mbar] 4000 1870 mbar 2020 mbar 2010 mbar 4250 4500 1870 mbar 2000 mbar 1980 mbar 4750 5000 1960 mbar 1900 mbar 1950 mbar 5250 5500 2000 mbar 1820 mbar 1920 mbar 5750 6000 2020 mbar 1730 mbar 1900 mbar 6200 2060 mbar 6250 6500 2060 mbar 1630 mbar 1880 mbar 6600 2060 mbar 6750 6900 >/ 7000 2040 mbar 1530 mbar 1850 mbar >/ 7250 >/ 7500 2020 mbar

The BMW M6 GT3, Honda NSX GT3, and Bentley Continental GT3 all get boost increases, while the 2015 Nissan GT-R NISMO GT3 gets a boost decrease from Round 2.

Feature image courtesy of OTG Motor Sports