Tire pressures
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Tire pressures
What are all you guys running for tire pressures. I have found over the course of more than a year that my Kumhos would roll perfect at about 31-32 psi cold both front and rear. I might take a pound or two out here and there depending on the course. I see a lot of guys running like 45 psi up front. I have never had to go that high, so what is the deal. Do I just drive that gracefully (while still slaughtering the comp) or am I missing something? And yes my tires have worn down even.
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For my Kumho 712s 215/40x16" on 16x7.5" rims I used 42 front and 37 rear for neutral handling. The only way to figure out the correct pressures is to use a Pyrometer to measure temperature across the tread.
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Tire pressures vary with track conditions, course layout and driving style. If your pressures work for you and don't cause heavy un-even wear, there's not much reason to wonder why.
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We race every month on one of the airfields out here (thank you Army!) and it is extremely grippy. When your tires bite out here, they bite HARD. I saw a guy in a brand new RSX chunk his tires after 2 months (about 8-9 runs each being about 50 secs). So I don't know what to make of the whole pressure thing. I was supposed to run up in ATL this last weekend but the event was cancelled because of the Nats going on. I just need to get somewhere else and see how I do against other competition. It sounds cocky, but the truth is, I am tired of winning. Does anyone else have this problem.
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I run 38 at each wheel on the street and my car handles much better. When it was down at 30 or 32 it handled like ass. So tire pressure does matter a lot.
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Originally posted by white_n_slow
nope, never had that problem
nope, never had that problem
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Originally posted by D16ROCKET
I am tired of winning. Does anyone else have this problem.
I am tired of winning. Does anyone else have this problem.
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Isn't that the best part of racing........knowing that it isn't necessarily your car, but the fact that you can drive the frigging rubber off the wheels of your car and out perform machines that technically should be faster than you. Every month I am out there, I get those looks and stares like "how the f--k does he do that?" I love kicking 300 b.h.p. all wheel drive ass in my 118 w.h.p. FF Civic, (Granted that particular car weighs close to 2 tons) or out lapping Si's which are in my class by a good 4-6 secs on a 48(me) to 54(them) second lap.