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Old 10-08-2008, 09:35 AM   #1 (permalink)
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Tire Pressure?

I have stock wheels on my 2007 Ion Redline - but it does have the competition package (the 17" gunmetal rims).

I noticed that the steering seems a bit off lately, and I checked the tire pressure. It is a bit off between tires so I am going to balance it out (currently between 27-31 PSI on different tires). What do you all find is the ideal tire pressure? I believe the tire can go much higher.

Thanks!
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Old 10-08-2008, 09:37 AM   #2 (permalink)
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I like to KEEP MINE AT AROUND 35 POUNDS for daily driving..i put about 45 pounds in at the auto x track to prevent side wall damage.
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Old 10-08-2008, 09:53 AM   #3 (permalink)
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If you look on the door jam it says 32psi. That goes for any tire. It is based on the weight of the vehicle and give the best tire wear.
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Old 10-08-2008, 10:08 AM   #4 (permalink)
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Yeah, I know it says that, but I also know you can go much higher (I think these tires can go as high as 50ish). I was curious if others have found any advantage to going above the doorjam numbers.
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Old 10-08-2008, 10:32 AM   #5 (permalink)
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You would notice a difference in the turn in and more snappy feel of the wheel, but for daily driving the excess tire wear would not be worth it. In auto-x we use the higher pressures mainly to prevent the side wall from rolling over.
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Old 10-11-2008, 08:52 PM   #6 (permalink)
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I usually run around 34 to 35 psi.
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Old 10-11-2008, 09:52 PM   #7 (permalink)
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Quote:
Originally Posted by silversatrn View Post
I like to KEEP MINE AT AROUND 35 POUNDS for daily driving..i put about 45 pounds in at the auto x track to prevent side wall damage.
I set my tires to 41psi for track day earlier this year. After the first run I looked at my wear indicators and I was way above where it was supposed to be. I found that 38psi got me to where I wanted to be.

Should I ignore the wear indicators on track day?
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Old 10-12-2008, 10:38 AM   #8 (permalink)
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Originally Posted by ebristol View Post
I set my tires to 41psi for track day earlier this year. After the first run I looked at my wear indicators and I was way above where it was supposed to be. I found that 38psi got me to where I wanted to be.

Should I ignore the wear indicators on track day?
yes.

i use 36/39 fr /rear road race 22/39 drag strip , for 17 Dunlops. GM used 36 for track testing in development...i have spherical joints on the flca, so at any pressure without the spherical joints with stock bushings in the flca on the road race track you will wreck the outer rib of your front tires. Who cares about wear bars if you are on the track? you get what you get on track and buy new tires.(monthly /weekly) Racing does that, wears stuff out quick and costs you money. On the street you get what you wish depending on how you drive - 25-50 k miles I use nitrogen as the molecules are larger and dont escape as fast thru the tire, no moisture etc to screw the tire performance...
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