355 Bypass valve vacuum tidbit | FerrariChat
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355 Bypass valve vacuum tidbit

Discussion in '348/355' started by eulk328, Aug 30, 2009.

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  1. eulk328

    eulk328 F1 Rookie

    Feb 18, 2005
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    #1 eulk328, Aug 30, 2009
    Last edited: Aug 30, 2009
    Just an information tidbit. Today I tested my O.E.M. exhaust bypass valve for the 355. It's a fairly new valve (less than 1 year old) and does not have many miles on it.

    Looked like it took 1.0~1.5 inches of Mercury for it to just barely begin to open.

    It took a vacuum of 8 inches of Mercury to open it fully (as shown on my Mityvac tester).

    Probably of no significance but---check was done with the valve off the car and at room temperature.
     

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