hepkat63

Hi Guys,
getting conflicting information from the usual sources. What do you guys recommend for 18" tire pressure around town (not track) please?

Steve Weiner-Rennsport Systems

Hi,

Local road conditions play a big role in what tire pressures one should use to protect the wheels.

I like 32/34 psi for general city & road use, but that's not always practical where there are a lot of chuckholes.

Goughary

I am 36 front 38 rear. Steve is likely stickier. I get better mileage...lol...

If you aren't getting the tires hot from hard driving, it's not going to matter too much what your cold pressures are.

I wouldn't go below where Steve quoted in the above post, but I would never go as high as Porsche recommended...the recommended pressures were designed to make sure you under steer heavily.

Keep in mind that you would have 4-6 pounds range cold to hot if you were driving the car hard. So if you think about that, anywhere in the mid/high thirties is going to be fine , so it's a question of you playing around and finding what feel right to you.

Parman

Steve, do you recommend these pressures for 17" Cup 1 wheels under the same conditions?

tcsracing1

depends on the tire....

Steve Weiner-Rennsport Systems

Yes I do. Aggressive drivers may prefer higher pressures for crisper steering responses so factor that into how you drive.

hepkat63

Nah, mine is all open highway rural driving. I have just done a 500km trip with 36 all round. Seemed ok?

Mr.Alex

I've always kind of wondered about this too. Some of the autox and track guys I've spoken to recommend a three psi difference from front and rear. Currently I'm at 34 front and 36 rear.

Gus

I would go with any greater difference than 3 lb between frt and rear pressure. Around town would think you could go a little lower -2 lbs frt and rear for a little softer rider. But, if you drive spirited then keep it at 32/34+. Make sure that the tire pressure is the same side to side, under hard braking a difference side to side can make the car feel a little squirrely - FWIW.

cobalt

Factory says 36/44 for 8 & 10 x 18. I found the turbo rides better if I run the 44 rear. The ride actually becomes more harsh if I drop the pressure below 40 pounds in the rear.