I asked the same question a while back on this form, with the feedback from that coupled with reading the engine manufacturers operation manual and the "Lycoming Flyer" engine tips I came up with this for my 180HP fixed pitch Lycoming. Full power/full rich for TO unless density altitude, when climbing thru approximately 700 AGL and after retracting the flaps I power back to just under 2350rpm at 500fpm and lean it out which brings the RPM back up to 2350 for a economy cruise climb, after climbing thru 2000ft I nudge in the power 25RPM for each 1000 foot of climb which gets me to 2450 at 6500 ft, I then re-lean and if climbing higher power up to 2550rpm and keep it like that on the remaining climb and level cruise.
Seems to give me a a good compromise between performance and economy
Edit, my engine is rated for 180hp at 2700rpm (red line) with the type of fixed prop i have it rarely gets above 2600rpm in normal operations
Last edited by piperboy84; 15th June 2013 at 19:06.