1.14" Sway Away Torsion Bars

Just installed a set of Sway Away 1.14" torsion bars. I am assuming that the wheel rate is about 320 lbs/in, but jouncing on the fender it seems like they are no firmer than the stock 318 bars. I do have blown out shocks on the front, but with that high of a wheel rate I would think it would be much stiffer.

I have PST 1.03" torsion bars and Bilsteins on the Scamp, and I can stand on the bumper and bounce it, and it will only move about an inch.

Sway Away does not call out a wheel rate but Firm Feel lists their 1.12" torsion bars as 300lbs/in.

Is it possible that torsion bars of this diameter could be softer than the 1.03" on the Scamp.

I would think that wheel rate would be determined mostly by the diameter, with the metallurgy and heat treatment mostly affecting longevity.

Anyone have any opinion, or expertise?
MOPAR "A" Body Torsion Bar Set, 1961-1976 - Sway-A-Way | Racing Technology