randr

29 front (245 - 20inch) 32 rear (305 - 20 inch) at 20 degrees C (991.2 C2S). When I picked the car up it had 38 all round........go figure.

randr

Next you'll be telling us you corner weight for left/right hand circuits

LTP

34F and 38R at cold, with 245 and 295 in 20"

GSIRM3

I bought a digital gauge so I can have 0.5 lb offsets rather than the 1.0 lb that you prefer. I also rotate the air in my tires every month, regardless of miles.

GregD

Thank you, I thought I was low - 30/33 cold, ->32/36 warm.
So glad the 991 can do this. I remember running a 996 with the recommended 44 psi rear to save the wheels, it was like balloons back there, and the road noise !

LexVan

Damn, now I have tire gauge envy.

Hurricane

No matter what pressure you set, make sure you only use OEM German air from Stuttgart in your tires.

GregD

Don't be silly, everyone knows US nitrogen is way better, you only need the 20+% german oxygen and argon to mix in, and match the factory fill....

yes, ;-)

4pipes

Easiest solution is to open the drivers door and look at the label.

randr

doh! you're right - I've been using some cheap aftermarket air from Australia. A tuner told me it was the real deal and good for at least 28PSI.....Will I void my warranty

Looks like I'll have to go to the Tech center and get a canister of Stuttgart N1 blend (P991000345).

911boy

Love that . Its supposed to be warm up here this weekend so i think I'll wash and rotate air. Thanks for the tip . I bet car rides a lot better with spring air.

Dewinator

Be careful, if you fill too soon after spring rains, you may be getting extra rotational weight from the humid air.

911boy

Good point . Maybe I'll wait......or try that Stuttgart N1. Thats gotta be good.

GSIRM3

But those pressures are for full load conditions and may be way too much air for "normal" driving conditions.

StormRune

I have to wonder how many folks are just using the pressures from the label and don't read the label beneath it that says something like "For better comfort, the tire pressures in the owners manual may be used". (Or better yet, just let the tire-pressure tech in the car itself tell you what pressures to use based upon your selections). I'd bet more than half of the cars out there (but not nearly as many Rennlister's) are driving around on brick-hard tires for no good reason.