Quote:
Originally Posted by asciimike
Hey folks,
While prepping for a track day next weekend, the local chapter says the following about tire pressures, "For the performance driving you will be doing, you should inflate your tire to pressures above those normally used on the highway. With higher pressures, the tires will be able to generate higher cornering forces and will not roll onto their sidewalls during cornering. Recommended cold tire pressures are 38-40 psi in the front and 36-38 psi in the rear."
This seems pretty high: I'm running like 33 psi hot on Firehawk Indy 500's all around when autocrossing and seem to get plenty of grip, and a little higher on the street, where I can definitely feel less grip (then again, the tires aren't nearly as warm).
Thoughts? I know a lot of it comes down to personal preference, but just wondering what others are running and what people think make sense.
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these pressures are normal for stock standard street tires. the assumption is that you have stock street tires. they need to be higher as their sidewalls are not as stiff as semi slicks and will roll and flex off the rim if the pressures are too low
ideal pressures you should be running HOT
Street tires is 40 PSI (300 TW)
High Performance but not semi slicks 36-37 (200 TW) these tires include Michelin Cup2, RE71Rs etc etc
Actual PROPER semi slicks AO50s, Z221, DZ03g, RE11s, 888R etc 32-34 (100 TW or less)
Falken 660, Firehawk Indy 500 etc are NOT actual semi slicks and running them at such a low PSI on a high speed track is not recommended.
there is a reason why its recommended for 38-40.