[DeTomaso] Bump Steer

[GW]

Like I said jack, that is not a fix; that just moves the parabolic arch 
to where it is less of a problem in bump.The problem is the rack itself.

I have made my own measurements. I have looked at Teds info. His info 
and mine are very close with the difference being slop in measurements 
his or mine (likelly mine).

The Ackerman change in a stock rack is minimal when moved up and down 
because the forward aft movement is small. It's hardly worth mentioning.

It is actually irrelevant in my set up because with my rack-box my rack 
moves up and down only; unless i cut and weld.

Gary


JDeRyke at aol.com wrote:
> Gary, on Ted Mitchell's website is info on the suspensions of both 
> early and late Panteras, which might help you.
>
> Using the stock rack, the Pantera's bump-steer is correctible (on most 
> cars that are not twisted) by either two 5/16" thick shims between the 
> rack and the mounting surface. Or by a 5/16" thick shim-washer between 
> each steering arm and a heim joint substituted for a stock ball joint, 
> using a stud with a Ford taper on one end and a straight shank on the 
> other. A 1/2-20 SAE heim-joint will thread directly onto a Pantera 
> steering shaft.
> Shims betwen the rack and mount surface alters the Ackerman toe-gain 
> as well as the bump-steer, since the mount surface is at a 45 degree 
> angle. Shimming not only moves the rack down (reducing bump steer), it 
> also moves the rack forward, changing Ackerman. Good luck- J DeRyke