[Fot] Racing tire pressure

Rocky Entriken rocky at spitfire4.com
Mon Oct 22 16:59:30 MDT 2007


Numerous factors figure in, including corner weight.

Also a factor is what you set them at cold and what they end up at hot.

In my Spitfire, I set them 21F/24R for autocross, 18F/21R for racing. They 
end up hot in the  25-27 range.

Used to be long, long ago my autox setup was just the reverse -- 24/21. Then 
I lost 100 lbs on the front end by taking the stock steel bonnet off and 
replacing it with a lightweight fiberglass one. Completely changed the 
handling of the car.

--Rocky Entriken

----- Original Message ----- 
From: "jim hearn" <jimhearn1 at comcast.net>
To: <fot at autox.team.net>
Sent: Saturday, October 20, 2007 11:43 PM
Subject: [Fot] Racing tire pressure


> It seems like for most cars the tire pressure is best a little higher on 
> the
> front than the rear (i.e. 32 front and 28 rear) but factory recommended 
> air
> pressure for the TR6 is for the street 22 front and 26 rear and for "high
> speed" it is 28 front and 32 rear.  Does this (more pressure in the rear
> than the front) prove out to be the most effective set up for the TR6 with
> race tires?  Any feedback on this would be greatly appreciated.
>
> Jim Hearn
> Sacramento, CA
> Two '74 TR6s (one street and one track)
>
> [demime 1.01d removed an attachment of type application/ms-tnef which had 
> a name of winmail.dat]
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>
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