ORIGINAL: rowdyjoe
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
Something else to consider: Since the prop is BIG for this engine & it is not operating @ maximum power under the best of conditions, the DA factor could reduce TQ substantially resulting in a bigger RPM drop than what might be expected if the engine were running @ peak HP under the best conditions.