Naw, that can't be quite right. The spring is in the center of the control arm, so if you would get twice the drop of what you cut off *except that* the spring then has fewer coils is stiffer than one with the regular number of coils, and will compress less under the weight of the car.

Make sense?

I bet that 164 springs already have a higher rate than 140 springs, and the more you cut them, the stiffer they get beyond that. You stand a chance of ending up with as much suspension travel as a go-kart.

There are very nice lowering springs available in both linear and progressive rates...