Join Date: Jul 2004
Location: DC burbs, MD side
Note that different spring rates will locate the lower perch at different elevations [edit: for a given ride height], so you can't really say whether the perch will interfere with your wheels for 10" or 12" springs. Example, a 500lb 10" spring will compress, say, 1.5" (assume the front of the car weighs 1500lb) putting the compressed length at 8.5". A 300lb 12" spring will compress 2.5", putting the compressed length at 9.5".
So you can see how you need to determine where you need the perch to be to avoid interference, and use that in combination with your spring rate and ride height to determine the appropriate spring length.
Last edited by huesmann; 12-08-2005 at 08:29 AM.