sleeper7

[quote name='Cheers!' date='May 18 2005, 04:18 AM']remove your rear antiroll bar. And run around 27 to 28 psi cold. You want the tires to be aruond 40 to 41 psi hot


[/quote]



Are you saying the sway bar is lifting the inside tire off the ground causing a loss of traction?



Tire pressure cold was at 25-27psi and went to 34-36psi hot. That was the at the start of the day. Second run was lowered to 22-23psi at the start and ended up at 32-34psi after 7minutes of run time. Tires "looked" like they were making full contact with the track but I did notice the car had more side to side movement at the lower tire pressures. I will try the 40psi when hot setting next time.

chuck

Cheers!

[quote name='sleeper7' date='May 18 2005, 10:10 PM']Are you saying the sway bar is lifting the inside tire off the ground causing a loss of traction?



Tire pressure cold was at 25-27psi and went to 34-36psi hot. That was the at the start of the day. Second run was lowered to 22-23psi at the start and ended up at 32-34psi after 7minutes of run time. Tires "looked" like they were making full contact with the track but I did notice the car had more side to side movement at the lower tire pressures. I will try the 40psi when hot setting next time.

chuck


[/quote]



Yes on the lifting. Unless it's due to lack of camber in the rear.



I have no experience running the yoko A320Rs, but most R compounds want to be between 40 and 43 psi when the tire is at operating temp. IF you are doing short stints you want to increase the cold tire pressure. Whereas if you were doing a 2 hour race non stop you want to be at a little lower in tire temp. Tires don't instantly heat up, especially a harder R compound like the A320Rs.