[SCOTI]

Originally Posted by bigmoe

I've always suspected that aftermarket front drop coils are just stock coils that have been cut. That would be why they can't tell you what the rate is. Also with cut coils the more you cut the stiffer it gets.

True, but it's a small percentage. I recall a compression test on a series of cut coil springs that yielded a small average increase of < 20% max (I remember most being around 10%).

The springs tested were similar to the line-up of C10 springs where there were different rating specs based on the options that dictated the use of a specific coil (it wasn't a test where one spring was from a 4cyl Chevette & another from a 454 Chevelle; the springs were all from one specific make/model). It was in an old magazine I had way before the NET (probably an old Hot Rod Magazine article on lowering).