OK, you didn't hear it from me because it is a "racing secret" - probably old enough no longer "secret" - for 997 cars 32-33 F / 35 R Hot. Any time they get 38 psi or higher they start to get greasy and slide. This was way different from what others had told me, so I snuck up on it, cutting my prior 36/38 Hot settings 1 psi per session. WOW! Glad I tried lower psi's and I am not going back!
Cold starting temps depend on weather and your driving - for me usually 7-8 lbs. less and take it easy 1st lap until they warm up. Tuesday at WG it was 34 degrees out for 1st session so I tried 30/30 cold thinking they wouldn't warm up much - last half of session tires were sliding - checked them and they had gone up to 40F / 43 R so next time I will start lower even when it's really cold out.
Cold starting temps depend on weather and your driving - for me usually 7-8 lbs. less and take it easy 1st lap until they warm up. Tuesday at WG it was 34 degrees out for 1st session so I tried 30/30 cold thinking they wouldn't warm up much - last half of session tires were sliding - checked them and they had gone up to 40F / 43 R so next time I will start lower even when it's really cold out.
Bob
2012 Interseries Cayman S #17
2006 997 GT3 Cup #18
2012 Interseries Cayman S #17
2006 997 GT3 Cup #18