I love before and after testing. Experimentalist, realist, or theorist??? I can't figure out which one fits me best.
Anyway, I did more torsional rigidity testing on my car for the heck of it. This time I tried to quantify the additional stiffness due to:
1) adding a weld in half cage (gusseted to the B pillar)
2) Removable door bars
Here are some pics of my car and the setup
It's been a while since I tested the seam welding (frunk only) and front strut bar but here are those results too. Note these results are all additive.
1) Seam welded trunk area 18% increase
2) Front strut bar with diagonal!!! 9% increase
3) Rear roll cage 9% increase
4) Removable door bars 4.6% increase
Granted my test isn't super scientific, I thought this group might like to see my results.
I would love to know how my car (not rusty) compares with a 964 or 993 model. Any volunteers?