Shine rear swaybar dimension & metallurgical advice needed...

[amalventano1 at tds.net (Allyn)]

Length: 39"
Circumference: 3.25"
Diameter (calculated): 1"
Torsional rigidity (calculated): too damn early in the morning

My hunch - I'd go with 1.25 or 1.5" diameter hollow tubing (between 1/16" and 1/8" wall thickness), welded circumferentially between
the two arms (not to the cross member), the closer to the hubs the better.

OK, so I did some rough calcs, and assuming metal of same length and properties is used (values are relative to the shine bar):

1.25 dia / 1/8" thickness: 0.84 torsion / 0.29 weight
1.5  dia / 1/8" thickness: 1.49 torsion / 0.36 weight

Unless my brain is still foggy, you can get 1.5x the rigidity at 1/3rd the weight with a 1.5" / 1/8" tube.

HTH
Al