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BOV Recirculation/Catch Can options

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    BOV Recirculation/Catch Can options

    Hey guys, I'm new to the whole turbo e30 area and I figured this was the place to go for some help. I recently turbo'd by m20 this past summer and it's all well and good except for a few things. The engine shoots out some smells from the valve cover openning which isn't too pleasant and the BOV chirps when going from positive boost back to vacuum (I've tried adjusting the BOV hardness to no avail). I aware that plumbing into vacuum created by the turbo intake would be the place to direct the BOV "out" port to quiet it down as well as the valve cover hose towards that direction. Gettting to the point, how do you guys have your turbo m20 setup plumbing wise to mitigate these smells and sounds.

    #2
    Vent to atmosphere or plumb to catch can, then to intake pre turbo. Make sure you get good oil/air separation though.
    "I'd probably take the E30 M3 in this case just because I love that little car, and how tanky that inline 6 is." - thecj

    85 323i M TECH 1 S52 - ALPINEWEISS/SCHWARZE
    88 M3 - LACHSSILBER/SCHWARZE
    89 M3 - ALPINEWEISS II/M TECH CLOTH-ALCANTARA
    91 M TECHNIC CABRIO TURBO - MACAOBLAU/M TECH CLOTH-LEATHER

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