Another problem with larger torsion bars is that the chassis may not be able to handle the larger bars. Essentially the unibody becomes a spring. If subframe connectors, torque boxes, etc have been added, larger bars become more effective.
I think this statement is the most over looked issue when upgrading to a larger torsion bar. With a STIFF chassis, you can run larger bars and not effect the ride. I run 1.02" bars in my 6.1 Hemi Duster with the complete US Car Tool Level 2 Chassis Stiffening Kit and it's not stiff riding, but it sure doesn't lean into corners!
