I would love to improve my van's handling on washboard. I air down, have aftermarket shocks etc., but I only just discovered the idea of a negative arc spring to replace the flat load spring on the rear leaf's.

Specifically these one's made by weldtec

https://weldtecdesigns.com/product/wtd-ford-e-series-negative-arc-platform-spring-pair/?srsltid=AfmBOoropk2ZgvXuLQCCd5OkJ2XdQ35Z3BVKzCb8

Mainly, I'm just curious if they're worth the effort and if they would make a difference...to their claims?

Anybody have experience with these or just removing the platform spring or ideas etc? I'm all ears, thanks

 

How?.

 

It's just the bottom spring. It's about 18 to 24 in or something. It's not even clamped into the leaf spring stack. There are helper springs that engage the shackles that you would typically clamp in under the support spring, but that's not what I'm speaking to here.

Best I can tell most custom and aftermarket leaf spring stacks come with a reverse Arc support spring versus a flat one.

 

Everybody's suspension contacts the flat helper spring. It's only a half inch off the leaf at static ride height.

 

You might consider getting another opinion, but this time from a spring shop. They deal with springs and suspension every day.