manifold pressure | FerrariChat

manifold pressure

Discussion in 'Technical Q&A' started by cavallo_nero, Feb 4, 2008.

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  1. cavallo_nero

    cavallo_nero Formula 3

    Nov 3, 2003
    1,707
    colorado
    Full Name:
    Giovanni Pasquale
    On a 308, Does anyone know how much vacuum (PSI?) is present below the throttle plate of a weber when you completely back off the throttle at, say 8000 RPM??? I am sure it is a LOT…is it measured in PSI???
     
  2. Artvonne

    Artvonne F1 Veteran

    Oct 29, 2004
    5,379
    NWA
    Full Name:
    Paul
    Its measured in millimeters, or inches of mercury. Some depends on valve timing, exhaust, etc, but it can go quite high in a situation like that, potentially well over 30 inches.
     

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