Bump steer on Tamora....
Discussion
Do a search, there have been several topics recently.
According to another PHer on here a few weeks ago Str8Six have stopped offering this fix now. You could try calling them. Otherwise a suspension specialist may be able to help, but they really need to know what they're doing as this involves changing the steering rack height and possibly different length steering arms.
According to another PHer on here a few weeks ago Str8Six have stopped offering this fix now. You could try calling them. Otherwise a suspension specialist may be able to help, but they really need to know what they're doing as this involves changing the steering rack height and possibly different length steering arms.
The stock of Sagaris steering arms has now run out I believe. They were discussed as a fix a while ago on the Tuscan forum but Graham Varley thought they moved the track rod end too low. Having changed the front set up on my early Tuscan to the later steering rack, wishbones etc, ie the same as the Tamora, and measured the bump steer it looks like he is right.
On mine, the ideal outer joint pivot position, with unlifted rack, looks to be just above the steering arm. Using a rod end bolted directly to the top of the steering arm (for setup purposes not as a solution) gives about 1mm of toe out at 1" of bump. The saggy arms look to put the pivot level with the middle of the steering arm, ie too low, giving more bump out. As I understand it, the steering instant centre is higher in relation to the chassis on the sag as the inner wishbone mounts are higher, so the outer track rod end needs to be lower to get the right angle on the track rod.
I think using stock arms and track rods, the rack needs to be lifted about 15mm or so but I'll know better when I've done some more testing next week.
Not sure if that helps!
On mine, the ideal outer joint pivot position, with unlifted rack, looks to be just above the steering arm. Using a rod end bolted directly to the top of the steering arm (for setup purposes not as a solution) gives about 1mm of toe out at 1" of bump. The saggy arms look to put the pivot level with the middle of the steering arm, ie too low, giving more bump out. As I understand it, the steering instant centre is higher in relation to the chassis on the sag as the inner wishbone mounts are higher, so the outer track rod end needs to be lower to get the right angle on the track rod.
I think using stock arms and track rods, the rack needs to be lifted about 15mm or so but I'll know better when I've done some more testing next week.
Not sure if that helps!
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