ORIGINAL: rowdyjoe

Speaking of HS RPM ....I have two FA-80's and both top out at 8100 to 8400 RPM swinging a ProZinger 14x6 on PowerMaster 20/20 and Cool Power 30/23 Heli fuel.
According to an old review I read, 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. I have 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 I started 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