27psi or 30psi ???
Le Mans Master
Joined: Oct 2002
Posts: 6,772
Likes: 1
From: Tampa FL
Dunlop SP9000
I run mine at 26 cold in the rear & 27 cold in the fronts.
the last set I ran around 32 and the center wore out before the rest .. i realized this and dropped the psi .. then it wore the rest of the tire out.
I run mine at 26 cold in the rear & 27 cold in the fronts.
the last set I ran around 32 and the center wore out before the rest .. i realized this and dropped the psi .. then it wore the rest of the tire out.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by Mike94ZLT1
The tires say 44 psi max pressure on the side, I figured 40 was a safe number.
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Advanced
Joined: Jun 2005
Posts: 65
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From: Kansas City MO
Originally Posted by LoneStarFRC
Your messin' with us, right?
Just when I thougth my 350Z handled better...Man enough to admit my mistake and lesson learned.
Drifting
Joined: Feb 2005
Posts: 1,332
Likes: 0
From: Columbus OH
Originally Posted by Evil-Twin
3 lbs. can make all the difference in the world... just ask any pit crew chief
In Ohio, land of extremem temp swings, my pressure will vary between 25 and 30 morning to mid afternoon. I usually get 4 "dings" in morning on my way to work. But by the time I'm leaving for home, they're perfect.
Although, I like the ride a bit better when the rears are over 30....33 ish is perfect for me.
Melting Slicks
Joined: Dec 2004
Posts: 3,049
Likes: 0
From: The second childhood is the best one of all.
Originally Posted by azmusclecar
I say keep them at 30 year round COLD, as stated BEFORE you drive on them. Life is simple , why do we make it hard?
The factories adjust for the temperature change as they warm up. Set them at 30 psi. Period. 
Racer
Joined: Dec 2003
Posts: 368
Likes: 0
From: Atlanta Georgia
St. Jude Donor '03-'04-'05
Originally Posted by AdamC5
The recommendations for PSI by the tire companies are usually what is referred to as cold. That means if they recommend 30 PSI, that's what your tires should read when they are stone cold (what they read first thing in the morning, not having been driven on, etc). The companies don't expect you to do the math and compensate for driving.
The factory recommendation is 30 PSI cold, which means just that; not 27.
However, it's all personal choice...some people like to run their tires a bit lower or higher.
The factory recommendation is 30 PSI cold, which means just that; not 27.
However, it's all personal choice...some people like to run their tires a bit lower or higher.
If you leave them at 27# you may get a low press warning....
Drifting
Joined: Jun 2004
Posts: 1,887
Likes: 2
From: Havin' fun in Frederick, MD!!!
St. Jude Donor '05 '09
Originally Posted by mrm1149
I just read on here today to adjust seasonally so they're running hot at 30, makes sense to me........ you're right , set them cold around 27 or so.........
I'm going to lower them to about 28 - 29 cold, and whatever they rise to this summer, so be it.
Safety Car
Joined: Apr 2004
Posts: 3,996
Likes: 77
From: Louisville KY
A question, when people sell their Vettes do they take the orginal owners manual and other materials out of the car? It seems to me there are a lot of common sense questions, such as this one, that are easily answered by the info provided in the car. A Corvette is a car, not a person, it does just as any other car would do, the oil gets hot, the tires increase the pressure as they get hot etc. etc. etc. I feel that too often a Vette is put in another category than automobile. 
30 psi is correct.
30 psi is correct.
Team Owner
Joined: Mar 2001
Posts: 21,325
Likes: 3,841
From: small town in S.E Pa. PA
St. Jude Donor '03-'04
Originally Posted by Jim2003
A question, when people sell their Vettes do they take the orginal owners manual and other materials out of the car? It seems to me there are a lot of common sense questions, such as this one, that are easily answered by the info provided in the car. A Corvette is a car, not a person, it does just as any other car would do, the oil gets hot, the tires increase the pressure as they get hot etc. etc. etc. I feel that too often a Vette is put in another category than automobile.
30 psi is correct.
30 psi is correct.
although it is acceptable..
People spend thousands on tuning their car, yet they let the one thing that connects HP to the road ( the tires ) to a sticker that was designed to protect against product liability, not performance , gas mileage or tire longevity. Early on there were issues about customers putting 44 psi as stated on the sidewall and having liability issues. Thus the very generic 30 psi sticker on the door.
1 or two psi can add or subtract hundreds of tire miles, 1 to 3 miles per gallon. This is so important that road surface temps are monitored BY every racing institution on the planet. I can't believe all these people have no clue about setting tires in the winter at 30 and setting them in the summer at 30, and no one seems to think that there is no benefit by tuning the tires for your driving conditions..
30 cold could easily equate to 34/36 psi, which is way too high, causes a center high condition, less contact patch, poor traction, loss of performance and gas milage. THat sticker goes on every car made, whether its in a -25 degree winter Minisota or a 115 degree day in Texas where black top roads can reach 160F, and tires swell to 36/38 psi..
If you think these tires perform the same at 27 as they do a 37 psi, then your just throwing your money away modding your car.
43000 miles on my tires and 33 mpg speaks for itself.
Last edited by Evil-Twin; Jun 20, 2005 at 04:57 PM.
Racer
Joined: Apr 2005
Posts: 310
Likes: 1
From: Sterling Virginia
Originally Posted by 1998 GTR
It's also a good idea to keep an eye on how the tires are wearing, especially if you ever use something other than the run flats. I have Michellin Pilot Sports and run 27lbs in front and 26lbs in back, but they are much wider than stock (275/35-18 fronts and 345/30-19 rears). When I bought the car it had 30lbs in the rear, and I didn't keep a close eye on the wear -- They wore out bald in the centers, but still had good tread on the edges. At 26/27 they wear very evenly. I'm sure I could have gotten a lot more miles out of them if I had kept an eye on how they were wearing. 
Just noticed my pilots doing this at 30 psi cold and dropped a few pounds per tire. Glad i'm not the only one!
-Rich