I agree with the overinflation too, except that the very crown of the tire
doesn't show the characteristic dishing. I'd try a degree or so less camber
and a couple of pounds lower pressure. And maybe zero toe if the car behaves
OK with that.
-----Original Message-----
From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net] On Behalf
Of Michael D. Porter
Sent: Tuesday, April 13, 2004 10:31 AM
To: Henry Frye
Cc: fot@autox.team.net
Subject: Re: Calling you tire/suspension experts
Henry Frye wrote:
> I have been seeing tire wear on my TR4 vintage racer that indicates to
> me I can improve something in the front end setup, but I can't figure
> out what to do. Take a look at these pictures:
>
> http://www.henryfrye.com/tires/
>
> Any comments, observations, words of wisdom? It would be nice to get
> more that two weekends on a set of tires.
Just looking at these from a strictly classical point of view, ignoring for
a moment the track and tire temps, I'd say there is a combination of three
things at work--slightly too much negative camber when the tire is heavily
loaded, slightly over-inflated, and the feathering on the second inside
tread indicates a very slight excess toe.
If the irregular wear is beginning on the rear, it could indicate that the
axle housing is sprung very slightly, along with a little over-inflation.
Just my guess from looking at them. Assuming the problem starts at the
front, with a 1-1/8th-inch bar, there may be enough roll stiffness up front
that there's a bit too much static negative camber to bring the tire upright
in turns.
Cheers.
--
Michael D. Porter
Roswell, NM
Never let anyone drive you crazy when you know it's within walking distance.
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