[Flybuddy2]

I have a 3 blade Catto (66X76) and a standard lycoming O360A1D. I do not have a manifold pressure gauge and generally run around 2450 rpm (2500' and below). I've been averaging about 6 gallons per hour so I'm obviously running a low manifold pressure. Owned a Mooney in past with this identical engine and it would average 9+ galls/hr at about 75% power. Does anyone else have a Catto with an O360 and a manifold pressure gauge that can give me an idea of what your manifold pressure is at 2450 rpm?? thx Tom (I'm saving for a Skyview with EMS so I'm not wanting to add a gauge that I'll be taking out in a couple of months)

 

[Geico266]

A MP gage is easy to hook up, just hook one up temporarily and use it until you get the Dynon. There has to be someone in your area that has one laying around. If you need one I got one you can borrow until you install the Dynon.

 

[sprucemoose]

Depends on conditions, altitude etc. I'd ballpark it at 19-20 inches based on my experience with a nearly identical setup.