- and to add a little:
we fly electrics also - and use Hacker outrunners as well as our real joy- tiny CDR rewinds
these things are truly ballistic.
Properly setup-cooled and adjusted - the increase in revs will not result in decreased life - rather look for an increase.
Why?
loaded engines generate more heat and the bearings take it right up the colos .
Look at what happened to the glow stuf when the big slow turning props beacome popular - same thing.
the surface speed on the piston is actually moderate -and if people would go to oil setups which really work - the rest of the carbon/scuffing etc -would really only become related to incorrect needle settings.
3D on most gassers is really not much above 1.5-1 thrust to weight .
Get your setup propped to jump into about -- 3500+ at hover- this should put you right in a sweet spot for bouncing the throttle stick for minor flight changes
propping to hover down at 2500 (if possible) puts one way below good carb flow etc..
On the ZDZ80 - the Mejzlic is good for- say up to 24 lbs -will still hove up to 28 pounds - done it - but the setup is a turkey.
Finally as I am sure most will agree -using a properly designed tuned pipe - one can run the peak torque UP to best performance in th 7000 range.
That's what pipes do best- increase (raise) peak torque band