Wide open at low altitude?

[Hank]

Again, this may be different for your E, but for low-level flight [up to 3000 msl or so], I often run my C at 23"/2300 and then lean away. It works well for short flights, and even with my 3-blade prop, it is smooth. Your injected E may be different. Before you ask, yes, this is pulled from the 2500 msl Performance Chart in what passed for a POH "back in the day."

P.S.--no fuel flow data to share, but data from the gas pump is right on or just below 9 gph at this setting.

[jetdriven]

in the J model 27" and 2400 RPM is approved as a ROP power setting. We use 27-28" and 2500 RPM, leaned to 9.5~ GPH. This is about 150 LOP.  Less cylinder pressure, and the full 155 KTAS with a 330 CHT#.    Airplane loves it.