"Allen" wrote in message
. com...
They are also multi-million dollar aircraft engine companies that
recommend against LOP operation. (Unless you are running a FADEC
system).

"Matt Barrow" wrote in message
...

Have they ever shown you or anyone else REAL DATA?

No? Gee, why not?


Yes, like Lycoming who recommends 50ROP. Got any idea what THAT will do to
your valves, heads, exhaust system?

Oh, and Columbia recommends LOP for it's IO-550'ed 400 model.

Well gee, think of the lure that TCM would have to produce engines for
aircraft manufacturers if they could tout running lean of peak. They don't.
Why not? Warranty costs. Get a clue.