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When I first got started with HPDE I thought that as long as you didn't roll over on the shoulder you were good. I didn't realize that by the end of the day my hot pressures were up in the 40's and I wondered why I was sliding around like crazy. The first time I had a "hot" session with my tires right in the sweet spot (around 32 front and 34 back hot, 225/45/17 and 255/40/17 Hankook RS3) I was like WOW. What a difference. A friend has a 996 with PS2s and ran these really high GT3 pressures and did not bleed throughout the day sp he was wickedly high in the 40's, once I got him to bleeding he was like WOW too and ran his best times.
The downside is airing them back up for the drive home... if it is a long drive like 3 hours they will cool back down and go below 30 if I don't give them a little air before leaving out.
Steve
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