Quote Originally Posted by jerry clayton View Post
I haven looked at one of there catologes for a couple of years but if I remember right---QA 1 had about the best presentation in there about springs and shocks---mounting angle, rates relative to arm length, unsprung weight,etc

of course when I did my first pro stocker, had problems---but when checking the springs themselves they were all over the place ---ended up with a pair of evry type of spring---probably still have 30 or so of them------
It's still a problem, Jerry.... Being an old circle burner, I still have a coil spring checker around.... I've had 120 pound springs test anywhere from 85 pounds to 150 pounds---- the difference in rate from one manufacturer to another is huge!!!! Tru-coil and AFCO seem to be about the closest to matching the advertised spec for pressure at height.....