Is there anyone who knows motion ratios of our suspension ? I want to calculate effective spring rates. I'm running custom suspension setup with 935 lb/in (front) and 896 lb/in (rear).

 

Don't know for sure but I would guess 1.8-1.9'ish? Easy enough to measure though. Measure from lower control arm rotation point (center line between the center of the two bushings) to the spring center, then LCA rotation point to center of tire. Divide the latter by the former and voila.

 

I would guess 0.8-0.7 for front and 0.7-0.5 for rear.