Tire pressure for best cornering performance? - 986 Forum - The Community for Porsche Boxster & Cayman Owners

CJ_Boxster · 10-31-2006, 09:47 AM

What the F, i thought factory recommended was 25 in front and 35 in rear? Thats what i've been putting and i have alot less vibration on the freeways and highways.

Perfectlap · 10-31-2006, 10:03 AM

I don't think you should deviate more than 4 pounds between front and rear.
maybe the flat spotting of your tires is more pronounced at higher pressures.
which reminds me I'm due for an alignment.

Sammy · 10-31-2006, 10:25 AM

I have found that during autocrosses when the front is lower than the rear the car understeers just like everyone has mentioned. When the tires heat up and the pressures increase I take pressure out of the rear to equalize between front and rear. The result is a more neutral/oversteer handling.

I think most people would prefer the neutral/oversteer handling when doing high performance driving which is why I think you liked the 28 psi all around better than the factory specs. IMHO 28 psi is too low...

Either way, for everday driving use the factory specs as understeer is much safer for everyone in all types of conditions. For the occasional twisties in good weather, I would pump them up in the 36+ psi range all around.