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      08-28-2012, 11:16 AM   #5
Tom K.
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Drives: '07 328iT, '13 Boxster
Join Date: Mar 2008
Location: Maryland

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Start with the OEM pressures and experiment from there. Decreasing the front/back differential will tend to reduce understeer but will make the car less stable at speed, especially in crosswinds.

The non-staggered 16" tires on my E91 call for 32/39 but I prefer 34/37 when the car is lightly loaded and 34/42 when carrying 1/2 ton of stuff.

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