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...
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