Sorry guys. I've tried the search function within the Cayman forum and can't find an answer.

My wife's Cayman comes with 29 psi front and 36 psi rear. I'm guessing this will lead to more understeer than I like when I drive it hard. Based on the fact that common wisdom for the air cooled cars (one of which I also own) is to increase the recommended front tire pressure from 29 to 32 psi to decrease the understeering tendency a bit, my guess would be to bump the Cayman's pressure up to the same amount - 32 psi. That's just a guess, however.

Does anyone here have some real world Cayman specific advice about this?

Thanks.

 

I did a search on the Boxster forum and found most of those guys are running 32 to 34 front and 36 rear. Is that working for you guys in the Caymans? I'll go with 32 unless I hear otherwise from you guys.

 

Those pressures seem just right to me. For road driving I usually start with 33/36. For autocross on the OEM tires, I start with 35/36, as the rears will gain more psi than the fronts. In cool weather, the OEM Michelin PS2s seem to work better at autocross for me than the Michelin Sport Cups.

 

I use 30 and 38 for daily with the Michelins and 31 and 38 with Bridgestones.

On the track, what worked for me was 30 front and 36 rears hot and on Michelins I found that I gain about 6 psi in the rear and 3 psi in the front. With the Bridgestones I use 32 front and 38 rear hot pressures.

For Autox, depending on the course, I either follow the track pressures or go as high as 8 psi difference between front and rear and generally I use 30 or 31 front hot pressures.

 

I use 34/37 cold for the street. Seems to help the understeer but not make it too tail-happy.

This is measured with a real tire gauge, not the TPMS which is always off a pound or so.

 

Thanks guys. I went with 32/36 and then took the car for a "spirited" run up Mulholland. The car was very neutral. It felt great.