Quote:
Originally Posted by TopTuning
Basic math will tell you that the inner LCA mount takes about 20-30% of load inline with vehicle. This is not a small amount so reinforcement is absolutely required. I believe the boxing of the control arm mounts to the cut tube and opening cut in the chassis is enough, but triangulating the tube to the chassis and perhaps adding additional tube supports could be worth while.
|
I can tell you from having a race car with raised inner pickup points using pivot boxes that a significant amount of force is run through the inner pickup points. With the torsion tube of 1987 930 chassis completely intact, my race experienced cracking in the chassis where the gearbox tunnel met the rear firewall. On top of that, the top of the pivot box above the bolt that holds the trailing arm in place was cracking as well. Yes, my race car runs big slicks so the loads are exaggerated compared to what a street car would see. The point is that loads are quite high.
If you cut a section of the torsion bar tube out, I don't see how you can get enough strength without adding one or more tubes to triangulate the two torsion bar tubes to the chassis.