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Old Aug 8, 2006 | 04:56 PM
  #21  
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I try to keep mine to where when they are hot, the pressure is reading anywhere from 30-32 psi. Normally it means that I have about 28-29 psi in the tires cold.
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Old Aug 8, 2006 | 04:57 PM
  #22  
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Originally Posted by Cole
GM quoted the recommended tire pressure for the standard tires issued with the car - usually Goodyear Run Flats. However, tire technology changes and many Corvettes are using non - runflats, ala Z-06, and aftermarket runflats and non-runflats.
GM recommends 30 psi cold for the Z's non-runflats as well Cole, so I don't see your point there. However, having read all what you said, by all means do whatever you like with your tires and their pressure. If you think 32.5 psi is what's best for you, that's great. All I can say is, for anyone not wanting to go through the analysis you did in determining what you think is best for your tires, then maybe using what GM recommends (30 psi cold) is the best all-around compromise.
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Old Aug 10, 2006 | 05:26 PM
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Originally Posted by 04MSGCoupe
Forgive me for asking but how do you get better gas mileage by inflating your tires with less psi than what's recommended? That doesn't make any sense to me.
Heres how....If the psi STAYED low then of course you wouldn't get better gas milage. When I keep 26-27 pounds of air in my tires(cold pressure) in the summertime(in my area it gets to 90-100 degrees in the summer and the asphalt gets to 150 degrees),my PSI goes up to 30-31 in 10 minutes of driving. Thats the PSI that you get the best footprint from with my runflats and therefore best traction and less wear and also the best gas milage. As ambient air temp changes with the seasons(resulting in different pavement temps), you adjust the cold pressure amount so when the tires heat up they get to 30-31 PSI...In the Springtime, Fall and Winter I keep more PSI(cold) in the tires so it still reads 30-31 PSI hot...
Hope that helps you understand now...

Last edited by Yello95; Aug 10, 2006 at 05:38 PM.
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Old Aug 10, 2006 | 09:49 PM
  #24  
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Originally Posted by Yello95
Heres how....If the psi STAYED low then of course you wouldn't get better gas milage. When I keep 26-27 pounds of air in my tires(cold pressure) in the summertime(in my area it gets to 90-100 degrees in the summer and the asphalt gets to 150 degrees),my PSI goes up to 30-31 in 10 minutes of driving. Thats the PSI that you get the best footprint from with my runflats and therefore best traction and less wear and also the best gas milage. As ambient air temp changes with the seasons(resulting in different pavement temps), you adjust the cold pressure amount so when the tires heat up they get to 30-31 PSI...In the Springtime, Fall and Winter I keep more PSI(cold) in the tires so it still reads 30-31 PSI hot...
Hope that helps you understand now...
So if the psi hot were to get to, say, 32-33, you're telling me you'd get worse gas mileage than you'd get at 30-31? I seriously doubt that Yello95, but who am I to tell you your business.
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