Gainer team chief engineer Yosuke Fukuda took to Twitter yesterday to speak out over the weight difference between the FIA GT3-specification cars and the JAF-GT300-specification cars in the GT300 class.
“Having competed for championships with both GT3 and JAF-GT machines, the minimum 200 kilogram difference in weight between GT3 and JAF-GT cars is a fatal problem with the balance between the two categories that must be corrected,” Fukuda said in a tweet.
Though the FIA GT3-spec cars, such as the #0 Nissan GT-R and #11 Mercedes-AMG GT3 used by Gainer in the GT300 class, typically have 100 to 200 more horsepower than their JAF-GT300 rivals, both the Nissan GT-R and Mercedes-AMG tipped the scales at over 1300 kg after the latest round of BoP adjustments.
In contrast, the Toyota Prius GT, Dome-Toyota 86 MC, and Subaru BRZ GT that took the podium places at Sugo this weekend each weigh anywhere from 1100 to 1150 kg – and combined with their superior aerodynamic profile, the high-downforce JAF-GT300 cars were decisively quicker throughout the Sugo race meeting at the technical, undulating circuit.
The #11 Gainer AMG of Katsuyuki Hiranaka and Bjorn Wirdheim (which is engineered by Fukuda) was the best of the GT3 contingent at Sugo, finishing fourth and briefly leading during the mid-race pit cycle. The #0 Gainer GT-R of defending GT300 champion Andre Couto and Ryuichiro Tomita, however, just missed the points in eleventh.
The high-horsepower Gainer GT3 specials may enjoy better luck at Fuji Speedway in two weeks’ time.