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gunda gunda is offline
Junior Member
Posts: 202
Join Date: Oct 2012
Car: BMW 335i E92
Default 06-03-2019, 07:44 PM

Might want to start with your PCV system as this issue has been discussed numerous times. Below is a link to a good discussion, but in summary you should use have a low & high side OCC setup, retain factory flapper on high side, and recirculate the high side to a vaccum source (single turbo filter or turbo inlets for twin turbo setups)

Dual Catch Can - Why you want to do it | BMW - SpoolStreet

Also here is a diagram of my setup currently, hope this helps.

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