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      11-17-2011, 06:31 AM   #34
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Drives: E92 M3,R56 S,F22 240iX,F82 M4
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Originally Posted by dapopa9 View Post
Yeah they article you posted also suggested the same as the Michelin article to lower front PSI to reduce understeer:

"If the tires felt very slippery, especially if they got worse on every lap, then the tire pressure is too high. Take each tire pressure and write it down. If only the front or rear tires felt slippery (the front was slippery if the car understeered and wouldn't respond to more steering input, the back was slippery if the car wanted to oversteer and spin), then lower the pressure of just that pair by 4 psig while they're still hot. Try this setting for the next session."
That's not the same thing. If a tire's pressure is too high then, yes, you must reduce the pressure in the tire. Tires have a pressure, actually temp, range they like to work in and if you exceed that pressure/temp limit the tires will start to feel greasy. This is a case of abusing the tires and having to reduce pressure to keep a tire in its operating range which is not the same as fine tuning the handling balance of your car - your cold pressure was too high and resulted in overheating the tire. Obviousy there's a limit to how much pressure you can use because the tire will start to balloon too much. Clearly, there's a minimum pressure setting, too.

Here's an example for you...if you set your the pressure of a tire at 20 psi and then 50 psi, assuming the tire doesn't get greasy (extreme example), which tire pressure setting will have more grip - the one at 20 or 50 psi?