Serge944

Am I the only one surprised at the low recommeded tire pressures on a 997.2 GT3?

29/31 psi, really?? The 996 GT3 was 32/39. I know the Porsche Turbos are close to 40psi.

I gave Porsche the benefit of the doubt, ran the recommended tire pressures, and got a puncture last night. As far as I know, low tire pressure is the main cause of punctures. Are all of you running the factory spec tire pressure, without issue?

It was a slow audible leak, and the factory tire sealant did not work. Maybe I'm just pissed that I wasted 2.5hrs last night on a flat tire... Serenity now!

ChrisF

Sorry about the flat. That sucks.

Yes. I've been running my MPSC's at those pressures with zero issues over 5 sets. I would imagine you could comfortably run them a little higher so long as you bleed off a little pressure if you go for a spirited drive. They seem to like 32f/35r hot.

GT3DE

No clue. I take my stock wheels/tires off my cars as soon as I get them.
I usually start cold at 18 rear and 20 front - but that is for R6 Hoosiers. lol

Serge944

Porsche dealer called, guess I ran over some yellow steel bracket. Probably debris from some of the construction work in the area.

Now the objective will be to take more right hand corners...

911rox

The cups I ran as specified on the tyre placard... For street tyres (ie MPSS), I run them at turbo tyre pressures as per the michelin book, ie 36/40.... Hope this helps

And sorry to hear about your troubles...

10 GT3

I doubt the tires pressures had anything to do with getting a puncture. I had a rear tire blow earlier this year, so I too have been through the roadside assistance/flat bed tow. It is just part of owning these cars. For tire pressures on the street, I run 34 psi on all 4 corners. I have a fairly aggressive alignment and this helps a lot with tire wear on the street without being too harsh. BTW, when I had my 996 I never ran the Porsche recommended 36/44 psi on the street. Ride was terrible. I always ran 38-40 out back. Just experiment and figure out what works best for you.

Nick Wong

29psi front/ 33 psi rear, GT2. That's what I run even with the wider front street tires with soft sidewalls. On the track I run Cups at the recommended hot temps as per Michelin guidelines.

Serge944

Yeah, I've come to grips that the tire pressures probably didn't have anything to do with the incident...it was a piece of steel that cut into the tire.

But, I will have to give a plug to Power Porsche in Newport Beach. My car was towed by Porsche's roadside service, I got a new Michelin PSS installed by around 1pm the next day, and the total came to $432. The tire alone is $420 from Tirerack. I'm extremely impressed with the overall dealership experience.

mikymu

flash wound. you should be able to drive that thing all the way home on bare rim. it's a GT3 ... it's tough as nail (no pun intented)

ADias

PAG has been steadily reducing cold tire pressure recs. The 991 (light load and <160MPH) is 31/34.

PAG uses now 2 criteria: load and sustained speed.