I didn't create the terms, those are what they are called. A longer lever has no effect on wheel rate or spring rate in our torsion bar suspensions. If you had a Camaro then yeah, that would matter because the coil spring acts in the middle of the arm and not at the inner pivot so spring rate will always be higher than the wheel rate. Basic suspension geometry which you need to understand if you are serious about handling.
Really the only thing unique about Torsion bar suspension is that Wheel rate = Spring rate. So its a little easier to pick a "spring" since you don't have to calc the motion ratio but that's it. The rest of the Wheel rate calc is the same as a coil.
So you're saying the length of control arm makes no difference to the wheel rate?
But isn't a sway bar a torsion bar spring too? I'm sure you'd agree the swaybar's "stiffness" and its contribution to the wheel rate is 100% effected by the length of its lever arm, right? but not a Torsion bar?
Well, either way, you best tell SwayAway to get that "ARM LENGTH" off their Torsion Bar Rate Calculator. They got it all wrong.
https://swayaway.com/tech-room/torsion-bar-wheel-rate-calculator/
