I bought a set of used griggs coil-overs front and rear with Koni yellow shocks and struts. I got two sets of springs for the front and one set for the rear, the fronts are 450# and #475, and the rears are #250. So I used the info on the maximum motorsports site to figure up the wheel rate for the 450# front springs and then what this would equate to in a normal spring, and what I'm getting is 1620#.
I took 450# x .9 = 405# wheel rate
405# x 4 = 1620#
I'm thinking that the numbers probably don't translate quite this linear, but if this is even close that seems far far to stiff for a street car.
These were on a fox with a 351w, which is what I was intending to install them in, but due a fortuitous turn of events I have a clean sn-95 roller that I was going to try to use them on. Griggs lists their coil over kits as 79-04 otherwise I wouldn't even think of this.
So my question is, is a 450# spring appropriate for a 90% street driven sn-95 with an iron headed 351w in it?