[TransamGTA350]

Originally Posted by N Camarolina

OK. Thanks to you and Msquared for the info about the 35psi cut-off and the mention of camber. I'm running -2.2 in the front and -1.5 in the rear. What camber are you guys running with these lower pressures?

I'm running camber plates up front with -2.9F/-2.0R. The SC3's and Vitour P1's were good with this setup. Bridgestones want a little more camber, probably more like -3.2F/-2.2R

[ItalianZL1]

Well she survived the track day. Kept pressures 32-34 psi and it seemed to hold up ok.
Started the warm up session in Track mode to get acquainted, but the nannies were too intrusive, so I moved up the mode to Sport 2 which reduced the TC a little, then tried the PTM Race mode which reduced TC even further and finally experimented with PTM Race and TC completely shut off..........

Well, the fastest laps were in PTM Race mode without shutting TC completely off.

With the TC off, it was a bit more unnerving as the car was more prone to oversteer and although kind of cool to watch, reduced lap times.

Thanks for all your inputs!

[nikerret]

Originally Posted by N Camarolina

In this thread, it sounds like most of you are seeking lower pressures. Any idea why the shift?

I’m relatively new to Camaro (bought a 2024, in late 2023). My car is set up with -2.6 on the front wheels.

Most of my laps have been at Hallett, which is a short, technical track. There, I found starting at 28-29 was good. My top speed there is 109 MPH and I barely hit 100 MPH three more times. There are no big, sweeping corners.

Last month, I went to Hastings. A much longer track with more and higher speeds. There, in the big straight, I hit 116 MPH, brake and turn slightly into a high-speed kink before hitting 109 MPH. There is some slower speed technical stuff, then a long sweeping curve at WOT, up to 94 MPH, then into a high speed corner before another technical section and another 100+MPH straight. I started here, at 28 and god the tires too hot before the end of the session. I played with them, throughout the weekend and found 26 was a better starting point, if I wanted more good laps, in the sessions. This was also a bit unique as the car count was so low - part of the time, my group only had three cars, so I could really push it.