Best Coilover Shock Spring Compressor

[TheJDMan]

With the 12-200 springs and all adjustments set as low as I can get them including the lower shock mount, the car sets about 3" too high. I don't understand what is wrong since Bret is running a 12-250 spring and the 48hour Camaro is setting exactly where I want to be in terms of ride height. Typically do these springs settle with time? Just out of curiosity, I sat 500lb of tractor weights in the trunk which lowered the car to the desired ride height but I obviously can't drive it that way. Would a 9-250 spring be comparable to the 12-200 if I need to go to a shorter spring?