Mark;
The EM2 reads out MPG. Most efficient
operation would be where you get the highest MPG. So go fly at 100F, or so; lean
of peak EGT and take some data of MPG and speed. You’ll find a max
MPG point that is slower than you’ll typically want to fly. I think
for my Velocity it was a fairly broad peak around 125 (I don’t even remember
now if that was MPH or Kts; because I never fly there in level flight). We didn’t
build sleek airplanes with more powerful engines to go the speed of a Skyhawk –
did we?
Al