FWIW just going by very rough chalk and temps, last time out on road course stuff I ended up being around 31-32 PSI "cool" (after a cooldown lap and 10-15 unavoidable minutes sitting before I could check and adjust, I'm guessing it's about 37-38 hot based on previous checks), and that seemed to be using up the surface of the tire and not rolling over, on street Conti DW's, and at my relatively tame level of skill. In previous runs I've tried going higher than that, but around 35-36 under the same conditions (low 40's hot) the car just felt too bouncy and unstable.
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