11-05-17, 08:04 PM
(11-05-17, 06:55 PM)stet link Wrote: Shame to contradict on my first post, but the stiffness of a round cross section torsion bar (spring is a coiled torsion bar) is proportional to the fourth power of the torsion bar diameter. As a result a slight increase in diameter results in a large increase in stiffness.
Ah... my mistake. Can't quite get my head around how it's a torsion spring, but you appear to be correct.
That would make the thou spring about 17% stiffer if all other variables are the same. And even if you do measure the spring rates it probably doesn't help much since the springs are different lengths and the FZ6 one looks as if it'll hit the stiffer rate a bit sooner.