Help, please! I'm trying to redo the motion ratios on my front shocks. They use pushrods and bellcranks. I've been prototyping these in 1/8 flat steel. I've now done five that won't work and it's getting to be a pain to cut, drill, file, install, measure, curse, measure again, curse more, and toss the prototypes.
Can anyone help me with the measurements and formula to compute bellcrank motion ratio? Good sources for this info?
I want a 2.1 motion ratio - one inch of wheel travel is 48/100, or 31/64 inch of shock travel.
Most recently, Prototype3 made a 1.90 motion ratio and Prototype4 made 2.35. I carefully and accurately split the difference in the holes for Prototype5, hoping for the average of 2.12 (close enough). However, it produced a 2.40 motion ratio!
The picture shows the whole left-side bellcrank. Pushrod attaches to the black steel piece, which is what I'm redrilling.
Or, am I doing this the hard way? Is it smarter to make a set that's close and tune with springs? (I'd like to avoid having to buy many sets of springs.)
Thank you for your time and help.