When my car was last tuned, the guys were happy to see the back of it as it did something like 70 runs with cams, adjusted cam gears, remove cams and just winding in more boost. All with a set of RE55s and i drove straight to PI from emchanics on a saturday night and did a 1:52 Sat morning. So with 260rwkws it doesnt seem to be an issue and the tyres were healthy...so there must be a way to get semis to live