[Trackrash]

Very interesting read.

I have noticed from my own experience that the width of the wheels and tires as well as the offset (including spacers) will have an affect on the spring rate. It makes sense that a wider wheel, or one with more offset, would create more leverage on the torsion bar. The result is a softer sprung car.
I recently changed from 7" to 8" wheels in the rear of my longhood. The result was a wallowy, noticeably softer rear suspension.

It seems to me that if one says "I have X size torsion and it feels like ..." should be in relation to what size tires and wheels are being used.

Wouldn't a narrow body car not need as large of torsions as say an RSR styled car?

Gordon