Tom Martin
Well Known Member
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Originally Posted by Kahuna
Bob, Today I got the following
DA 8500', WOT, 2700RPM, 50ROP, 206ITAS, 16.0GPH
Without checking my power chart I would say that you are above 75% here and I have always been a bit nervous about aggressive leaning in that power range. I regularily run LOP below 65%. What are the leaning guidlines above 75% power. Last year I ran full power and full rich in the Rocket 100 race and I am curious to know how much I can safely lean at these high power settings.
I was at 30.5", 2600 rpm and around 26gph. This is with a MT three blade that does not seem to show a speed advantage at higher rpms. During this race my engine was running very cool in terms of CHT and oil temp so I certainly could have leaned more in that regard but these are not the only concerns at high power settings. Leaning even a little, would increase my power but how much is safe?