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      04-28-2013, 12:24 PM   #4
FogCityM3
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Drives: M3 (E90) & Porsche GT3 RS
Join Date: Feb 2012
Location: San Francisco

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Thx, yeah I've tried the PSI rear/front differential and it definitely helps..fine running this on the road, but more worried about doing this on the track, particularly effects of lower PSI on rear and associated negative effects on sidewall strength and grip/stability.

Quote:
Originally Posted by swamp2 View Post
No, increasing rear sway bar stiffness will reduce understeer. A less expensive option is to modify tire pressures. Higher in the front and lower in the rear will reduce understeer. Of course you don't want to make changes with pressure significant enough to cause poor wear patters. The stiffness of the tires sizes/types generally run on cars makes it a bit more challenging to get an effect here meaning you might have to run from 30-50 psi to get the desired effect.
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