Manifold pressure auto regulator

[=4c=Nikola]

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Edited June 15, 2014 by =4c=Nikola

[sobek]

Yes, the regulator has only limited "throw", so to say. As soon as the compressor output gets too low, you need to adjust the pressure manually. Also, the regulator cuts out below 40 or so in.Hg. Compare what happens if you go into a high speed dive from cruise speed with 46 in.Hg to 30 in.Hg. In the latter case, you will see MP rise due to increased ram air pressure in the inlet duct, in the former, nothing will happen as long as you are within regulator operation limits.

Edited October 7, 2012 by sobek

[Yo-Yo]

MP regulator has no authority below 40" and at higher settings its authority increases, so if the setting is higher than 50" it works near perfectly.

In the transient zone (40-50") you need to keep ypur eyes on the MP gauge as you climb (or dive) advancing (retarding) the throttle manually opening (closing) the batterfly valve to maintain required MP.

 

If you climbing keeping 46", blower switches to HIGH when the throttle is full open and the boost willl jump up to 61", so you have to retard the throttle.

Edited October 8, 2012 by Yo-Yo