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In reply to Fred Moreno's note from Orin Riddell's comment.

Orin's comment on his TurboSkylane RG running lean of peak.

This is the stuff that ends up in OWT (old wives tails).

What engine does he have on his TurboSkylane RG ? Does it have very good
fuel distribution ? How many degrees lean of peak did he ran his engine
? Could he have leaned further without roughness ?

The fact the TSIO-550 runs at even higher temps is higher potential for
the benefits of lean of peak operation. The critical factor is running
agressivelly lean of peak, let's say 100 or more degrees lop rather than
50 degrees. If you can run it 100+ degrees lean of peak you'd be getting
the equivalent to full rich for lower temps.

Again, I don't have a TSIO-550 myself, but I what I'm trying to note is
that we're going with generic recommendations that only have true merit
on the original airplane with that powerplant without GAMIjectors.

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