evidently the steering must self centre.

Apart from tow out 3 degrees each side,can anybody help me on this one?.

(BTW) i'm using sierra uprights with MK top ball joint adapters.

Who says it must self centre Bob, is it part of the SVA?

Castor angle has the greatest effect on self centring which is designed into the suspension and not something you can adjust easily. If you've followed the book then you should end up with about 5° castor but you would still get away with about the norm of 3°, would help keep the tyre wear down this way.

PS. As long as when you look the upright from the side when it's in place the bottom ball joint is in front of the top it'll be ok. If the tops in front then you'll be fighting the steering in every way but reverse. But too excessive and the steering will become heavier.

PPS. I'm using the sierra upright too and found that I had to tilt the steering arm up slightly to give me the castor angle I wanted. 4°.

Cheers dunc
I think i've worked the prob now.
My top balljoint insert is eccentric,but only about 10mm off centre.
I think this needs to be more so as to tilt the hub further.

If it's RWD it should toe IN!!!!!

'bout 1 deg should do it.

Cheers

Chris