Tire Pressure
Melting Slicks
Joined: Feb 2016
Posts: 2,984
Likes: 380
From: Edmond Oklahoma
yeah, well for my car with the Bilstiens and Michelins, 32lb cold, front and rear make a BIG difference.
The car is much livelier, agile, quicker steering, more toss-able, rides good and feels more connected to the road, I was using 30lb for years, hard to believe the big difference,
Try 32 LB for your base model cars (unless you think it rides rough at 30).
The car is much livelier, agile, quicker steering, more toss-able, rides good and feels more connected to the road, I was using 30lb for years, hard to believe the big difference,
Try 32 LB for your base model cars (unless you think it rides rough at 30).
Last edited by LowRyter; Nov 19, 2018 at 10:15 PM.
Instructor
Joined: Jun 2018
Posts: 247
Likes: 116
From: DFW, TX
Totally agree with Mr. Boomer. In the short time (4 months) I've owned my 2008 I can tell a big difference in ride / handling when the tire pressures rise to high. I now start out my rides at around 28 PSI and end up around 30 to 31 depending on the outside temp. I may even stop and bleed a little off. Early on I was out on a ride and the pressures went up to 36 PSI. The car rode hard and was darty on the road.
Thanks for the great explanation Mr. Boomer.
Mark
Thanks for the great explanation Mr. Boomer.
Mark
Le Mans Master
Joined: Oct 2000
Posts: 6,511
Likes: 730
From: Sausalito CA
Boomer has some good points.
30 Hot.
Interesting as many haven't commented about this before.
I think most of these OEM tire stickers say to set pressure cold?
There is also no discussion of tire temp, operating heat range, alignment heat readings eg Pyrometer use.
Again in my case, the way I drive, without frequent high speed, on '05 Vert, Firestone Run Flats I use 33 ft/ 27 re cold.
Hot they go to 36/ 30 (the old 10% increase from cold rule of thumb).
In winter the PSI cold drops 2 or 3 degrees.
My DIC readings match my handheld gauge.
I get good road feel: lighter steering, better rear traction and great tire wear (with street alignment).
Even at 36 hot the center tread of the front tires do not wear faster than its sides and the rears wear even
across the tread.
Brands, compound/ construction, pressures, feel, wear, Pryrometer readings all may be different preference for each owner.
Boomer again has a point that a 1/2 pound makes a difference in NASCAR/ F1 to the driver and the podium place.
Just adding to the forum content with my above comments.
Have fun everyone.
30 Hot.
Interesting as many haven't commented about this before.
I think most of these OEM tire stickers say to set pressure cold?
There is also no discussion of tire temp, operating heat range, alignment heat readings eg Pyrometer use.
Again in my case, the way I drive, without frequent high speed, on '05 Vert, Firestone Run Flats I use 33 ft/ 27 re cold.
Hot they go to 36/ 30 (the old 10% increase from cold rule of thumb).
In winter the PSI cold drops 2 or 3 degrees.
My DIC readings match my handheld gauge.
I get good road feel: lighter steering, better rear traction and great tire wear (with street alignment).
Even at 36 hot the center tread of the front tires do not wear faster than its sides and the rears wear even
across the tread.
Brands, compound/ construction, pressures, feel, wear, Pryrometer readings all may be different preference for each owner.
Boomer again has a point that a 1/2 pound makes a difference in NASCAR/ F1 to the driver and the podium place.
Just adding to the forum content with my above comments.
Have fun everyone.
Team Owner
Joined: Jul 1999
Posts: 26,545
Likes: 46
From: Huntersville NC
A good estimate to use when comparing tire pressure to air temperature is for every 10 degrees F, tire pressure will adjust by 1 psi. For example, if the outside air temperature increases 10 degrees, the tire pressure will increase by 1 psi.
Or not, per post above, I could leave them at 27 cold as they warm up to 30 after a little bit of driving....
Last edited by PRNDL; Nov 20, 2018 at 10:39 AM.
