Looking at a logbook and saw some history that made me curious. This is a high performance 360 lycoming that was overhauled with the log entry "heads ported, polished, and flowed". many years later the log says "removed and replaced #1 & #3 , installed complete assemblies". Now looking at the engine it is readily visible that the barrels/heads on the LHS look old while those on the RHS look newer (better paint, less corrosion). This leads me to believe that the LHS has the porting and polishing while the RHS does not.
Now this makes me wonder if this is a bad thing. I think about uneven power distribution, or power pulses, just a theory. I wonder if there are rules of thumb out there among you high performance folks about such a situation?
Now this makes me wonder if this is a bad thing. I think about uneven power distribution, or power pulses, just a theory. I wonder if there are rules of thumb out there among you high performance folks about such a situation?