Coil spring (spiral) in a 1971 Dodge

[F4R/T]

Inner fenders are stamped sheetmetal not designed for the abuse of a spring pushing and hammering against it. It will fail, torsion bars are so good GM and Ram still use them. They offer lower ride and center of gravity, adjustability, easy service, options for spring rates, and the list goes on. Don’t reinvent the wheel tune it ... your car not mine. Kern Dog is pretty sharp on suspension and wheels, so is superbeemike. Tons of info here look around there are guys road course racing these and doing well with a lot of stock parts and a few tricks.

 

[dvw]

To me it appears to be well done. As far as extra load tearing stuff apart? Two things come to mind. First is this system is supplemental. So the extra load can't be that much. Second there are plenty of unibody cars that use coil spring mounting. Thefactory upper control arm mount sees plenty of load in stock form. Look at old NASCAR and drag aplications that wheelie. Would I do it? No, the torsion bar system works well. It's funny, many think a coil spring works by compression and magic. What really happens is the coil wire rotates and twists just like a torsion that is coiled up. The factory stuff has less unsprung weight. Get the correct bar and shock for the application.
Doug

 

[Runcharger]

Exactly: A coil spring is a torsion bar, just wound and anchored differently is all.
I think the dramatic increase in unsprung weight would make the suspension react more mushy which may make it seem like it rides smoother, it would handle worse though as it would react much slower. You could probably get a similar effect by adding 20lb heavier wheels on the car, of course 20lbs heavier wheels would change steering input just as dramatically by the centrifigul force they would apply, so that would be a separate issue.

 

[#41]

Sure its possible. You have seen it. What are you questioning? If you like it, just do it.