Kevin, about the only way to figure out the best way to tune your engine is to get out and practice with it,,, try different props,,, needle settings like a 1K rpm pinch, a 500 rpm pinch,,, etc. Never launch your nelson at peaked out RPM, it will melt away,,, and try to use the same fuel that your local Races are providing(makes no sense to practice with 5% no name brand when 15% name brand stuff is provided). Keep notes on what works and what doesn t,,, notes about weather in the morning and afternoon.

There really isn t nothing about tuning your engine,,, its all about you getting to know and understanding it with practice


BV