Hello all, I've been running my formula 1st in autoX, C-Mod. class this season. The front and shakes really bad under braking but goes away if I let up a bit on the brakes. I never noticed this condition when road-racing but I was much more easy applying the brakes in that racing environment.
Before the last race I had the front wheels balanced, no change.
I've checked the front ball joint's for free play it's negligible if any ditto tie rod ends. Also no freeplay in steering box.
Checked torque on the four bolts holding the front end to the frame.
The upper beam/torsion bar has a little over a 1/16" of freeplay side to side. Is that acceptable?
I've checked the front beam tubes for straightness with the straight edge (across the end plate/shock towers) and a machinist rule Both the upper and lower beam appear to be swept back 5/32" on the right side and both upper and lower beams on the left side appear to be swept back 3/32". Not sure this is a totally accurate method to check.
The third possible culprit is the extreme angle/laydown of my shock absorbers, see photo.
Your thoughts, comments are appreciated. This shake will tear things up and it's not fast either!