Well the tq curve isn't perfect yet. I still have work to do. What I did manage to do was get rid of the erratic spike in the curve.
Got any helpful sugestions?
I have different springs to try, different base timming to try, and if I can dig one up, a different advance plate to try.
I need to tune the ignition timming to get the highest tq above 540 (pink curve) and the highest tq below 540 (yellow curve).
By the way, at 300 pto rpm my ground speed is cut in half and the pull is over at that point anyway.