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wannafly
06-08-2010, 03:53 PM
I have the new 912s in and all is well...runs great but am confused by the manifold pressure reading. At idle it is reading 15-17 in. hg and at cruise...5200rpm...110 mph it is down to around 5 in. hg
Is this right? I have the IVO inflight adjustable and would like to know how hard the engine is working. I can take it right down to 0 in. hg at 5000 and 130 mph. I do not have a fuel flow gauge yet but using rough figures it is around that 5 gallon/ hour.
Your thoughts?:confused:

Mnflyer
06-09-2010, 09:53 AM
Hi Wanafly, should to me that you have a vac cum gauge vs a manifold pressure gauge, a manifold gauge will read around 27 to 29 in Hg with the engine shut down.