A1Aflorida

Hello All: First time tracking a 981 Cayman GTS, previous was a 987.1 Cayman S.

987 - 18" wheels with Michelin PS4S - Goal was 32 - 34 PSI at end of the sessions.

981 - The selling dealer installed Pirelli P-Zero's on 20" wheels - P235/35R20 & P265/35R20, N1 spec.

First time on P-Zero's and since these tires are a much lower profile than those on the 987 I need advice on proper tire pressure. I am afraid to start with too low of a pressure, might damage a wheel if catch a rumble strip wrong before temps have a chance to increase. But of course I don't want to end up with too high of a pressure towards the end of the session.

What say you drivers with same vehicle and tires?

Cliff3

I did my first event driving this car on the OE Pirelli's. I kept them at 35psi hot and they were fine. I ran one hour-long session (there was an open pit lane at this event) to experience an extended track session and the tires started getting greasy towards the end off that session. I was not pushing the car too terribly hard since the car was new to me at the time. Ambient temps were probably in the low 80's. You should probably go out at 28-29 cold, bleed them down to 35 when you come in, monitor and bleed as necessary after each session, and ignore the TPMS warnings you'll see for the rest of the day.

A1Aflorida

Thanks so much Cliff3. Exactly what I needed to know!