328 - Engine Vacuum | FerrariChat

328 - Engine Vacuum

Discussion in '308/328' started by BNSC100, Jul 22, 2017.

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  1. BNSC100

    BNSC100 Karting

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    My Car = 1986 328 - USA Spec
    Anyone got rough estimate of engine vacuum at idle speed. Below are my numbers.

    Warm idle = 1,000 rpm
    Vacuum at plenum where brake booster connects = 13-14 Lbs. fluctuates within 1lb
    Location = Central SC - USA. Approx 300 Feet above sea level

    I have read posts regarding the GTSI cars that say as low as 10lbs and these cars may run lower vacuum than most..? Also read the 308 WSM indicates, but can't find in my 328 WSM...?
     
    BNSC100, Jul 22, 2017
    #1
  2. mike996

    mike996 F1 Veteran

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    Hmmm, good question...that vacuum reading at idle would be too low for most OEM engines, indicating a possible vacuum leak or a problem with worn rings but maybe 180 degree crankshaft motors like the Ferraris generate less vacuum at idle; I have no experience at all working on/with 180 motors and I have never done a vac check on my 328 so can't even offer a comparison. It will be interesting to get more information!
     
    mike996, Jul 22, 2017
    #2
  3. mike32

    mike32 F1 Veteran

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    Thats a new one on me- measuring vaccum in pounds. I usually see it in inches of mercury or mms hg
     
    mike32, Jul 22, 2017
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  4. BNSC100

    BNSC100 Karting

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    Sorry. Inches is what I meant... :)


    Sent from my iPhone using Tapatalk
     
    BNSC100, Jul 22, 2017
    #4
  5. ferrariowner

    ferrariowner Formula 3

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    On a Euro 308 QV you should see around 12-14 inches of vacuum. I think your 328 should be in that range.
     
    ferrariowner, Jul 22, 2017
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  6. mike32

    mike32 F1 Veteran

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    mike32, Jul 23, 2017
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  7. MNExotics

    MNExotics F1 Rookie BANNED

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    12-14 is normal. My 2 valve with performance cams is 11. These are low vacuum engines
     
    MNExotics, Jul 23, 2017
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