Tire Pressure
Rennlist Member
Joined: Jul 2001
Posts: 13,912
Likes: 4,040
From: Marineland FL
Instructor
Joined: Mar 2016
Posts: 141
Likes: 1
It depends I guess on a lot of factors such as driving style and road conditions. Too be honest, i dont think about the life of the tires on a 991. Driving a 991 with tire pressures too high, you're not able to drive the car quickly around turns.
Everyone's psi liking is going to be different based on their car and suspension setup but once you find that sweet spot, it's great!
Everyone's psi liking is going to be different based on their car and suspension setup but once you find that sweet spot, it's great!
Burning Brakes
Joined: Jan 2011
Posts: 965
Likes: 89
From: Near Charlotte NC
- No Wash
- Tire Pressure is Fine! I read the manual (and I put a smiley because they know me).
- And NO stinky spray!
Pro
Joined: May 2017
Posts: 686
Likes: 231
From: Seoul, Korea
you might also get tire pressure warning lights if your tire inflation is not in the correct setting. for instance if you set the Tire Pressure Monitor to normal load and run the tire pressure at comfort psi, you sometimes may get a warning light.
RL Community Team
Rennlist Member
Rennlist Member
Joined: Jan 2010
Posts: 6,153
Likes: 1,664
From: New York
LOL! Yeah I need to add this to my list too as they sprayed some foul smelling "air freshener" in my cabin the last time my car was in for state inspection!
Rennlist Member
Joined: Aug 2018
Posts: 1,486
Likes: 80
From: Central New Jersey
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Instructor
Joined: May 2015
Posts: 134
Likes: 13
From: Scottsdale
It is a fair question. I started listening to the door. Until I tracked. The TPM had a hissy fit. First the pressures were way too high and I danced all over the shop. Kept letting them down and down and dance and down again and again.
What did I learn. IGNORE that Porsche call the setting comfort. Set it to comfort. Then let a lot of air out of your tyres. They have them far too over inflated. Comfort dead stone cold is 29/32. So I set to comfort and run +1 at 30/33.
That is the best for street. As soon as you hit the track, you will have to start lowering the. Image my shock when I drove on ice at the track the first time as I started at 40/44. By the time I danced into the pits I was at 50psi. That won't happen again. LOL I thought man I am really disappointed with the way this car handles on the track. Hahahaha. 17 pressure reductions later....Hello Porsche!!!
What did I learn. IGNORE that Porsche call the setting comfort. Set it to comfort. Then let a lot of air out of your tyres. They have them far too over inflated. Comfort dead stone cold is 29/32. So I set to comfort and run +1 at 30/33.
That is the best for street. As soon as you hit the track, you will have to start lowering the. Image my shock when I drove on ice at the track the first time as I started at 40/44. By the time I danced into the pits I was at 50psi. That won't happen again. LOL I thought man I am really disappointed with the way this car handles on the track. Hahahaha. 17 pressure reductions later....Hello Porsche!!!
Funny story. I went to an "intro to drifting" course years ago and there was a young guy there that didn't reduce his pressures on his BMW M5 before starting. After about 5 minutes of doing doughnuts, we heard two loud explosions. Both rear tires had exploded. He hand no spares.
Pro
Joined: Mar 2016
Posts: 662
Likes: 43
From: New England
I was initially running higher temps (~38PSI hot/street) and the center sections of my rear tires were wearing out prematurely.
Instructor
Joined: Mar 2018
Posts: 238
Likes: 31
Found comfort to be....well the most comfortable (GTS) but a little squishy when pushing it on local back roads as I don’t get the temps up consistently enough. Normal summer partly loaded was a little rough, settled on that -1psi as a sweet spot for now YMMV