I am putting this thread under Aerobatics because I know that we tend to be more willing to push our engines. A sane biplane pilot would be much more likely answer whatever is most conservative just as they would a question about redline. I am looking for responses from the less sane. What mixture setting are you using for full power? Here is why I ask: My Pitts is the only piston/non-constant speed engine I have flown since the '90s. The first day with it I noticed that I was getting lackluster takeoff performance with full mixture. So I leaned it back about 3/4 inch and enjoyed an additional 100 RPM at 100 MPH and much stronger performance. I thought that this was just a unique thing with my aging motor. But now I have a new motor with a newly overhauled fuel servo. Since the engine is new and I wanted to keep the CHT down I only briefly leaned it before returning to full rich for the initial climb. But the result was the same (100 additional RPM) with full rich a disappointment. Thanks!