Quote:
Originally Posted by MightyMouseTech
Surface temps are pretty much meaningless, unless they are real time. You need a probe that gets close to the core rubber like rsxpilot said.
I have found the ZII's like to run about 40 PSI when hot. So, set them to about 32-34 cold, go out and do about 4-5 laps at speed, come in and bleed them down to 40. Later on you can let your tires fully cool down and you will know your starting cold pressure. Usually it is a different pressure for every tire, and will be different for every track.
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That is more or less my approach on purging pressure as well. If I do up to two 20-minute sessions/hour, I usually aim/purge down to mid-thirty PSI hot pressure, as soon as I come into the pits. At one point during the day, hot pressure stabilizes, and adjustments are no longer needed ...