Can someone please explain

[speedy66]

Whats is the benefit of a variable rate coil spring.. Basically Im looking for a good spring to launch for drag racing.. But can be mild mannered on the street.

Is a variable rate coil spring what im looking for?
Mustang plus variable rate coil spring

 

[mustangdave]

It will give you a softer ride under normal driving but as you enter a corner hard the spring compresses taking advantage of the coils that are stiffer thus preventing excess body roll.