sooo...
best case is zero bump steer. This results when the rack pivots line up with a line made by through the upper and lower A arm pivots (ref Chassis Engineering, Herb Adams)
4 solutions, listed from worst to best (IMO)
1: extend the inner tie rod on the right side, simply cut rod, slide extension tube over the cut portion, re-weld. this yields zero bump steer on the left when straight, maximizes the bump to the right. NOTE: I have not removed the shock/spring to measure how much bump steer exists
2: cheat the position of the rack, it won't be in the center when straight (Factory Five's current soln.) You equalize the bump steer in each direction but turning radius varies because there are more turns to lock in one direction vs the other
I've went through all of the build threads, every existing car shows a compressed bellows on the left and extended on the right when straight.
Erik rack right.jpg
erik's
metalmaker rack.JPG
metalmaker's
waynes rack.jpg
wayne's
3: shift the rack to the right to place the rack in the center of the car, equalizes the bump steer to both sides, allows equal turning radius both ways, equal lock to lock on both sides (as per above) Bob can you do a simple measurement of bump steer for us with this solution?
4: lengthen the rack slide. make a spacer that screws into the rack and has female threads on the other end so that the inner tie rod screws into it. I'm not sure if the bellows will stretch far enough... I'll be attempting this solution