They were excellent, I was all over the 2 Z06's in front of me running stock GY's. We were pushing hard enough that they were getting squirely and my Z was still planted. The track sessions were only 10 laps (which I ran twice) on a relativly short track. I based my tire presures on what the mfg recommended for road courses which is 32 psi frt and 34 psi rear measured hot. I also went to the trouble to have my alignment changed to -2.1 degrees camber front and -1.4 degrees rear, had I known the sessions were that short I probably would not have bothered.jswatek said:How did the Michelin Pilot Sport Cup tires work for you at the track? I am wondering about tire pressure. What did your optimal tire pressure end up being? I want to start close to the ideal pressure. Thanks!