Manifold Air Pressure questions
Posted: Mon Mar 29, 2010 8:49 am
To the clever people out there, please help me clarify something in my own mind.
I think I understand what Manifold Absolute Pressure gauges do.
What I don't understand is what purpose a MAP gauge has on a machine with a turbo charger, that has a fixed pitch prop and no mixture setting other than to possibly indicate a malfunction and an 'over-boost' which the Turbo Control Unit does in any event? As I understand it, in the aforementioned case, Engine RPM and MAP will correlate at any altitude and remain consistent.
So, the question is, on a 914 Rotax, fixed pitch, is there any reason for a MAP gauge?
... or am I missing something?
I think I understand what Manifold Absolute Pressure gauges do.
What I don't understand is what purpose a MAP gauge has on a machine with a turbo charger, that has a fixed pitch prop and no mixture setting other than to possibly indicate a malfunction and an 'over-boost' which the Turbo Control Unit does in any event? As I understand it, in the aforementioned case, Engine RPM and MAP will correlate at any altitude and remain consistent.
So, the question is, on a 914 Rotax, fixed pitch, is there any reason for a MAP gauge?
... or am I missing something?