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Old 03-08-2012, 07:32 PM
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gary@germanautosolutions gary@germanautosolutions is offline
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Location: Grand Rapids, Michigan
 
Join Date: Jul 2010
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Mein Auto: 528-530 Hybrid, Duc. 748
After reviewing the Mann-Hummel unit documentation, what appears to be a vacuum regulator on the side of the unit is actually a positive pressure blow off regulator.

If you're not going to use a low vacuum, closed regulation system like the stock BMW CCV unit, then I believe that the only safe alternative is just a vented catch can. I believing connecting full manifold vacuum to a closed crankcase is a bad idea. I'll be posting a bunch of technical information on the CCV subject in the near future.
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