Vacuum Gauge Reading - NCRS Discussion Boards

Vacuum Gauge Reading

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  • John Lokay

    Vacuum Gauge Reading

    I would just like to get some feedback concerning the vacuum gauge readings I recently got off my 1966 425 hp coupe with a Speed-Pro Sealed Power (part #CS-165R) factory clone type cam. I believe the readings are satisfactory:
    At 900 rpm: 15 inches of vacuum
    Also, when I slightly adjusted the idle mixture srews on the carb (Holley 3247) I got the vacuum reading up to 16 inches. By the way, I took the vacuum gauge readings from the fitting located on the top rear of the intake manifold. Thanks.
  • Joe L.
    Beyond Control Poster
    • February 1, 1988
    • 43193

    #2
    Re: Vacuum Gauge Reading

    John-----

    It sounds about right to me.
    In Appreciation of John Hinckley

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