Thread: B13 Traction Bar Ideas

I welded a box on my frame rails for my bar

To keep from having a bind issue with vertical movement, the pivot of a brace at the chassis needs to be on the same axis as both lca mounts. Anywhere else and the farther the LCA moves up or down, away from the POINT THAT IT WAS INSTALLED WITH ZERO TENSION, it will bind more and more.

This is correct. Please see

http://www.full-race.com/articles/traction_bars.pdf

So whats the word on Matt's (Performance Plus) design?

Did you view the file I linked? What do you believe?

Not good. The chassis end of the bar needs to mount inline with both lca mounts. If not the squish of the bushings and tires, and the flex of the steel mount and ultimately the flexing of the lca will absorb all bumps. Until the bump becomes severe enough to overcome those parts, then something WILL fail.

But, It looks like it is inline with the chassis end mounts of the LCA.

Vertically and horizontally? Not that I can see.

Only one one out of two planes required are in line on Matt's design. Basically, imagine the LCA made with the traction bar attachment point. There are now two pivot points that are fighting each other at the rear, lower inner control arm. There are two, rear, inner control arm points. That is binding, and eventually something else will break during street or racing situation involving loads (not necessarily Matt's arms but something else on the car!) Matt does a lot of drag racing so I would not expect his to fail on him because this works great for his purpose, straight line sticking fury.

Same thing with white steves arms but if you imagine those LCA to chassis points, the shape is even more weird and causes binding.

EDIT: But this works great when traveling in a straight line! Hook and go!

A simple way to think of it mounting it so a straight bar passes thru it and the center of both lca bushings.