4. Manifold Pressure/RPM Relation

Manifold Pressure/RPM Relation

  • U

    Shouldn’t the Manifold Pressure increase when RPM is decreased with the Prop lever?

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    M
     1 Reply
  • M

    It does, but only just slightly. During run-up, when cycling the prop for example, a drop in 500rpm would yield about an 1” rise in manifold. For lower rpm reductions of a couple hundred rpms at a time, you may see perhaps a 1/2” rise and for rpm adjustments of 100 or less, MP needle movement is even noticeable. @ual763

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