I have no idea why everyone has different PI's, mine is 294 some are less some more but everyone seems equal on track.
I will invite you to the race if you want...10:00 SHARP. If you miss the race we will be having other for fun races!
Its the wheel choice and tire size i think. If anything the PI should be nothing more than 295, otherwise the difference is the wheels. Also make sure your running the wider wheels in 15" size.
Btw: with clutch, im getting roughly 1:41-1:42's on RA.