Lean of Peak operation

[hharney]

Originally Posted by JeffAxel

When I had my P337, it was pretty consistent at 23gph, about 50LOP, I would see 184KTAS in the high teens. My particular P337 had intercoolers, air conditioning, deice boots, VGs, and all of Bell's cooling mods though, so it was pretty draggy. It ran well LOP though, and never had any issues with CHTs.

Jeff, what degrees lean of peak would you operate? Was that the set point for you or was the GPH?

[JeffAxel]

Herb, 50LOP was where I ran the P Skymaster and it worked well. If I went leaner, the engines would start to miss, especially the rear one. If I went richer, I would get into temp issues (CHT and TIT) until I was quite a bit rich of peak, like 150ROP. If I had that plane now, I would try running it at 2450RPM, top of the green MP and 50 LOP. This might get me more speed. I was running at 60-65% power the way I was flying it. I took the APS course after I sold the P337, and would fly it a little different today. In my P210 I run 50LOP, but at higher power settings, so I really don't loose any speed, just go the same speed on 3gph less fuel. The TSIO 360 will run smoothly LOP if set up properly.