<VV> Re: tire pressure - was wobble

Mike Kost vairmike at sbcglobal.net
Thu Nov 15 14:33:44 EST 2007

I have never found 40psi all around to be a desirable condition for 
autocross (or any other situation). I have not run the latest "HOT" tire 
or slicks but I agree with Seth that for racing you set the pressures 
based on tire patch and on course response. You can often get by with 
less differential in autocrossing than on the street because there is 
less physical consequences if you loose it in a turn. In racing you can 
afford to be a little more on the edge than on the street due to greater 
concentration and skill. With proper alignment and driver skill the 
handling may improve with reduced differential but may be less safe for 
every day street driving.

Mike Kost
27 years of Corvair autocrossing
36 years driving Corvairs on twisty country roads

Sethracer at aol.com wrote:
> In a message dated 11/15/2007 10:55:22 A.M. Pacific Standard Time,  
> hmlinc at sbcglobal.net writes:
> The  autocrossers (for the race) will go to 40psi all the way around.  So,  
> what (if anything) does that say?
> Most new autocross tires, whether DOT "hot spec" autocross tires or even  the 
> newer slicks run a lot less pressure than that these days. Pressure is  
> commensurate with load on the tire - which also depends on the size of the tire  
> and the footprint. Now, on a street tire, the higher pressure helps maintain the 
>  pattern on the ground, but for correct pressures, visual inspection of the  
> contact patch is the best guideline. - Seth

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