[Three Peaks]

From what I can determine, IRS springs need to be calculated differently from live axle coil-over springs. Determining the motion ratio and the angle ratio of the shock determines the spring weight.
After doing the calculations front and back, I checked with several people with Factory Five cars which have approximately the same suspension set up and they are using the same spring weights as I came up with after my calculations. So, I'll give them a try and see how they work out and go from there. My car isn't finished yet, so I won't know for a while yet how they are.

I will be doing some open track days and autocross events as they become available, so I went a bit over the street recommended weights on the springs to help with cornering handling. In addition, I added sway bars front and back so I hope I'll be set for awhile once I'm on the road.

Bob