i ran my GS-R friday and my best time was a 15.27 @ 89 MPH, 60ft = 2.32 . setup is AEM CAI, DC JDM 4-1, Carsound cat, RS*R(old skool) exhaust. my tires are khumo ecsta supra's 195/55-15 and running them at 25psi, launching at 3000 RPM and still spinning pretty good off the line. some guy was telling me to drop to 20psi but i thought that was a little low for street tires. anyone have any suggestions or let me know what tire pressure you usually run. TIA

 

I dump my fronts to 20 psi for the track. It's fine at the track, just fill em back up to spec ASAP after the track.