horstman reaper spring height with red springs ,three washers also for weights

Setting up for adult class for a flat head engine springs are .091 ,3800-4000 rpms
You might try the old bathroom scale between the front of the kart and a strong wall trick. The clutch setting that gives you the highest reading on the scale is the best clutch setting. Be careful. Don’t burn the clutch.
Comments compliments criticisms and questions always welcome.
If the data does not support the theory, get a new theory.
That .225 spring height is to the top of the spring or to the top of the retainer that the adjusting screw goes thought?