Speaking of HS RPM ....I have two FA-80's and both top out at 8100 to 8400 RPMswinging a ProZinger 14x6 on PowerMaster 20/20 and Cool Power 30/23 Heli fuel.
According to an old review Iread, this engine with this prop should turn 9400 RPM. If that's correct, I'm making the same mistake on both engines but, can't figure out what it is. Ihave a steady idle on both engines around 2100rpm and they are both running a bit rich as the idle speed "pinch test" shows a rise in rpm.

Anyone have an idea of what the max rpm should be for this set-up? Is the article correct?

I remember getting around 9200 on my first FA-80 with Turboheader (the other one is a GK version w/stock muff). I noticed the rpm drop last Sat. when Istarted it up. The weather was overcast and humid, temp was in the low 80's. Can't figure out why rpm would drop 800 after a week of sitting in the garage. My carb adjustments resulted in the same settings and, needless to say, performance was off.

HELP

Thanks,
RJ