If you have put 305 or 315 on all 4 and race...please share your set up...which coilover...spring rates (min suggested)...front or rear roll bars...bushings...wider fenders...adjustable control arms...wheel size and offset....going to do this next season...thanks for any suggestions...

 

Are you talking road course or autocross?

 

Ah, this question needs direction. Class? Experience level (national series/tour)? Why that size?

 

mixed use roadcoarse and autocross events...i run 235 in dirt... run 275 star spec on volk te37 10.5x18 tarmack depending on event... what changes have to be made...just looking for set up that has worked for other people running 315 r compounds... what spring rates,contol arms needed?,what coilovers,bushings,roll bars, camber,ect...and help appreciated..thanks

 

There are very few people who have run 315s on a ct9a. PM psushoe and he may be able to help you out. I currently run 285s, but I'm considering making the switch.