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I have no problem driving with 32 psi cold front and rear. I understand raising pressure a bit for road driving is fine as it saves a bit gas though make your car feel stiffer. But I have to say 40/45 psi is way too high, and for track driving, I thinking common practice is lower the tire pressure instead of raising the pressure? I know people warm up tires on track and lower the pressure to recommended value (i.e. 32 psi hot instead of cold). Many of them lower it even more. Low tire pressure gives you more contact area with track surface and improves handling.
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