I may be a jerk here but I just listened to a seminar by Fat Man Fabrications and his big beef with front steer suspensions is Ackermann. Actually, the lack of Ackermann causes severe bump steer. Any comments out there?
Please don't take this wrong, Ackerman has absolutely nothing to do with bumpsteer,Ackerman is the relation between the location of the outer tie rod end in relation to the lower ball joint,also they only time you would have Ackerman problems, is when you don't use the correct spindle, if you have a spindle designed for front steer, Ackerman for front steer will be designed accordingly, in conjunction with the wheelbase of the car, the location of the tie rod end outside of the lower ball joint, and opposite for a rear steer application, front steer is no better or worse than rear steer in the field of actual performance if it's designed correctly, Ackerman does not effect bump steer, it effects the difference in the amount each front tire turns. Watch the video again, I think you're confusing something, I've watched the video, and never seen what your talking about.
Hope that makes sense.