I'm just trying to find out before I buy springs whether or not my 3-way shocks will handle them. If I buy a 240 lb. spring and my shock settings are 100, 150 and 200 lbs., the spring will overcome the shock on launch even on the shock's stiffest setting. Of course I can't buy 180 lb. springs if they won't hold up my front end, but I'm having a hard time believing how difficult it is to get the information necessary to make an informed purchase. In the chassis book I bought, Dave Morgan says people don't pay enough attention to shocks and springs when setting up their chassis, and from the lack of info on shock rates, I'd say that's an understatement.
I suppose I could do what it seems everyone else is doing and purchase springs hoping they are a good match with my shocks, but that's really not very scientific, nor does it put me on the right foot towards properly diagnosing chassis problems when I get on the track.
And so my search goes on. Would be nice if Moroso or Comp Eng would answer my emails concerning their products.