Thanks Skip. Useful information on the GT6 arms. If I can't find TR4 arms,
heating my arms or the GT6 arms is definitely an option. It seems
heat-treating should follow the heating and bending. This may not be a
service available around where I live. I would guess that heat treating
could consist of gently heating the whole arm under a dull red and then
burying it in dry sand for several hours . I don't think one needs to
restore temper, just relieve internal stresses, also known as normalizing.
And if you didn't do any of this on your arms, I didn't even bring up the
topic and you can go back to forgetting about them :)
Stephen
> ----------
> From: Skip Gurnee[SMTP:skip47@home.com]
> Sent: Tuesday, June 20, 2000 6:20 PM
> To: Hill, Stephen M EDUC:EX
> Cc: 'TVR mailing list'; 'mtooze@tan.unl.edu'
> Subject: Re: Steering Arms
>
> Steve-
> I just realized what caused my steering rack arms to angle rearward when
> the rack was attached at the front holes in the frame: I'm using shorter
> steering arms from a GT6. They give quicker steering. They also don't
> fit in STOCK form, they must be heated and bent to clear the brake
> disc. I worried about the heating for 5 or 6 years, but no cracks or
> failures have let me forget them (and they have seen some extreme
> use!). The moral of the story is that there are alternatives out there.
> You can find them on all sorts of cars, including Lotus, so you need not
> think only TR3-4-6 when you're making a change.
> Best,
> Skip G.
>
> "Hill, Stephen M EDUC:EX" wrote:
> >
> > Hi Marcus. I was looking at your webpage on the TVR steering components
> (see
> > below) and wondered about the steering arms you were referring to. Are
> the
> > shallow droop TR4 arms early or late? Locally, I have found a source of
> TR3
> > steering arms. Would they be the same as the shallow droop ones?
> >
> > Stephen
> >
> > 1. The stock 2500m suffers from terrible bump steer. Bump steer is a
> change
> > in the direction that the wheel is pointing (with NO input from the
> steering
> > wheel) during suspension travel. The main cause of the bump steer is the
> > stock TR6 steering arms. They cause a steep angle between the steering
> rack
> > and the tie rod end,. To cure, use the 'shallow droop' TR4 steering arms
> > (not all TR4 arms are alike). It is likely that TVR designed the
> suspension
> > geometry with the TR4 part in mind, then some clever soul changed to TR6
> > parts without consulting anybody...
>
|