Quote:
Originally Posted by Icecreamtruk
As low as you can run them without the sidewall rolling over and still getting them to ideal temperature, thats the formula.
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I don't agree with the "low as you can go" approach to tire pressures...
And anyway, there's no definite point of transition between "sidewall is not rolling over" to "sidewall is rolling over". Radial tires are very stable over a fairly broad range of pressures. Also this may be a recipe for running too much pressure for under-cambered cars, and too little pressure for cars with track-appropriate 3-4 degrees front camber.
For most of our cars, there's going to be a quite broad range of pressures that will perform well, IMO there's no reason to try to find the lower limit.
You can invest in a pyrometer and try your best to get actual representative hot temps, but then you still have to correlate that back to what is the best temp distribution across the tread for quickest times for your car.
Or you can just run 34-36psi hot pressures and not worry about it any further, for 99% of us that's going to be close e-damn-nough...