who knows about Marelli Digiplex advance ? | FerrariChat

who knows about Marelli Digiplex advance ?

Discussion in '308/328' started by [email protected], Dec 24, 2009.

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  1. andy2175m4@yahoo.com

    [email protected] Formula Junior

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    Andy Rein
    I have an 82 308, and I am reconstructing all the missing plumbing....

    Regarding the vacuum spark advance, does the marelli digiplex ignition unit need to be connected directly to the intake manifold, so the unit sees max vacuum at idle, or does the ignition unit need to be connected to a vacuum port upstream from the throttle plate, so it sees max vacuum at max throttle plate opening (ie like a typical vacuum advance distributor) ??
     
    [email protected], Dec 24, 2009
    #1
  2. luckydynes

    luckydynes F1 Rookie

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    plugs into the plenum so it's relatively high at idle.
     
    luckydynes, Dec 24, 2009
    #2
  3. luckydynes

    luckydynes F1 Rookie

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    "max" vacum actually occurs during decel FWIW also.
     
    luckydynes, Dec 24, 2009
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