Tire Pressure
Melting Slicks
Joined: Feb 2006
Posts: 2,172
Likes: 104
From: Des Moines Iowa
Yep, owner's manual says 30 lbs. cold. I am running less air pressure, since I am seeing more wear on the middle of the tire on my OEM run flats, especially the rears. I'm running 28 cold front and 26 cold rear. Once they warm up, it's like 32 and 30 respectively.
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Race Director
Joined: Sep 2004
Posts: 17,786
Likes: 4
From: Redsox, Pats, Celts & Bruins !!! Redsox Nation !!!
St. Jude Donor '06-'07-'08-'09-'10-'11-'12
30 cold will turn into 32-35psi when running at temp. To much air and you'll wear the tire sooner. The sticker on the door will tell you what you should be running for psi in any tire.
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN
Follow the factory specs, you won't be sorry. 
Burning Brakes
Joined: Aug 2006
Posts: 1,155
Likes: 0
From: San Diego California
Yup. I have consistently used about 36-37 lbs cold- both in my 93 C4 and 02 C5, daily street driven. Better wear and performance. Ya gotta get up on your toes to run. Stop draggin around the rubber n buying tires every 15K miles. Before some of you yell that it exceeds GM's recommendations, give it a try. Your vette will feel firmer and quicker. Its not a Buick.
Melting Slicks
Joined: May 2000
Posts: 2,498
Likes: 4
From: Brentwood TN
I run 32 psi and the difference between 32 and 27 psi is noticeable. The "feel" through the steering wheel is subjectively better, and fuel economy is about .5 mpg better, maybe a little higher.
Charlie
Tech Contributor
Joined: Jan 2007
Posts: 19,450
Likes: 1,155
From: Dyer, IN
Yup. I have consistently used about 36-37 lbs cold- both in my 93 C4 and 02 C5, daily street driven. Better wear and performance. Ya gotta get up on your toes to run. Stop draggin around the rubber n buying tires every 15K miles. Before some of you yell that it exceeds GM's recommendations, give it a try. Your vette will feel firmer and quicker. Its not a Buick.
Pro
Joined: Feb 2004
Posts: 507
Likes: 0
From: Owatonna MN
Yup. I have consistently used about 36-37 lbs cold- both in my 93 C4 and 02 C5, daily street driven. Better wear and performance. Ya gotta get up on your toes to run. Stop draggin around the rubber n buying tires every 15K miles. Before some of you yell that it exceeds GM's recommendations, give it a try. Your vette will feel firmer and quicker. Its not a Buick.
There is a reason the manual recommends 30PSI.