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Thread: tire PSI

  1. #1
    Senior Member
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    tire PSI

    What PSI in 265 and 325, on 33.

  2. #2
    Seasoned Citizen NAZ's Avatar
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    These are light cars running relatively large tires and don't need near as much pressure as most believe. I use the tread temps to adjust mine. When I have fairly even temps across the tread after running a long straight section of highway I'm close to optimum. Of course, toe and camber will affect the heat pattern across the tread so you need to keep that in mind.

    If you start with the max inflation number marked on the side of a large tire you can expect that tire to be overinflated and you'll see that in the temp of the tread -- the center will be hotter than the edges. The tire tread temps and inflation pressures are closely related.

  3. #3
    Senior Member Gordon Levy's Avatar
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    around 21psi
    99/2000 NASA PSO Champion-2005 west coast FFR challenge series Champions
    Sponsor Tony B's 2007 ST2 National Championship
    2009 NASA TTC runner up-2010 NASA TTB runner up

  4. #4
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    I run 24 psi in my 245/17 front Nittos and 25 psi in the 295/17 Goodyear Eagles rear. Find the front to hug better with less bounce. Also the softer Nittos are great for the front hand handling if it is lined up properly and tighten the coilovers. Am carrying an aluminum 427 Ford Racing Engine up front which is way light so the lower pressure really keeps the front end down.

  5. #5
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    1 psi for every 100 pounds of car weight is a good starting point.

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