John Deakin talks quite a bit of running Lean of Peak (LOP). Here is his first column on it. There are several more in the archive section.
Pelican's Perch #8:<br>Go Ahead, Abuse Your Engine!
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I ran LOP in a turbo normalized bonanza with an IO-550. We'd run props high, at 29" all day long, burning 17gps with a TAS of around 190kts. Never had any problems with the engine. But we had GAMIs and a digital engine trend monitor.