Improving Torsional Rigidity - without a roll cage.

[260DET]

Is there a particular weak point that may be reinforced to improve torsional rigidity? The 'member through the firewall area' has been reinforced which has improved things but it appears that there is another weak area towards the back. Perhaps in the area where the stock rear sway bay goes through from side to side underneath through an open channel?

 

For various reasons I don't want a roll cage. And the body has already been strengthened eg by running tubes attached under each sill section from front to rear and tied into front structural members. My guess is that such tubes should have been extended rearwards past the sway bar channel. Or the body could be reinforced from the inside where the passenger area compartment meets the hatch area compartment? I seem to recall that convertible conversions do that.

[fl327]

You can add steel and weld up the factory spot welds, under high power(high torque), these spot welds can fall apart.

You could reinforce the frame rails with box steel

add triangles to the tc rod part of the frame rail and that will add some rigity, also weld the floor frame rails with a long bead all the way down.

If you want to go nuts, you can cut it out and replace them with stronger steel.

The spot weld reinforcement can do alot.

Structural foam in the hollow parts of the frame and more welding can do this more, and add less weight to the frame.

Theres more to this im sure, but this is all I can think of off the top of my head.