You just can't tune for maximum RPM, you end up to lean. I tune using the pinch method, which takes a little while to 'learn' the technique, but what I end up with is an engine that runs slightly rich (which is good), slightly lower than max RPM, and one that won't quit because it is to lean.

I've tried using the tach, but I don't like doing it that way. I seem to end up with a setting that is to lean, and don't get good transitions, nor do I get good performance on vertical maneuvers.

Don't get me wrong, I do have a tach, and do check RPM with it, but use my ears to tune the high-end. Again, as with other issues, this becomes a personal choice and how we learned to set the engines up.

CGr.