Jon
Based on my limited knowledge, I know this:
Springs can be wound linear and progressive. They are easily told by the way the coils are.
- Even distributed coils are linear wound.
- Coils which have spaces go wide to narrow are progressive like H&Rs for the gvr4. The wider part has a lower spring rate level??(dunno right term) and is there mainly to provide a smoother ride and handle little bumps. The stifness comes mainly from the tighter wound inner coils. These are similar to helper springs found in coilover setups.
So, on the progressively wound springs, cutting the 1/2 to 1 of the upper coils (like on the H&R for the gvr4s in the back to level the car out) does not cause much of a difference. The ride will be a little stiffer, but dunno if the difference is apparent.
IMHO, doing the same thing on a linear spring will make a bigger difference compared to the above.
They can be cut with something electric, I think. A hacksaw would take a bit of time to do coz they are hardened steel in most cases. I am sure a sawzall will fly thru it.
As always, avoid putting any heat on springs such as a torch etc etc to help lower the car. That is the ghetto fabolous way of doing things.
I hope this is helpful for the newbies when searching the archives about springs. Keywords: spring rate, cutting springs, TEL springs on gvr4, eibach pro-kit on gvr4 etc etc.
KC