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Message: <blockquote data-quote="MachSVT" data-source="post: 1561619" data-attributes="member: 31918">I'll try and update this late to show my seup on an Eaton swapped car, but overall I can verbally illustrate for now...I have two -10 lines off my valve cover into oil seperators. The "fresh air" (pasenger) side is after the mass air meter (this is a very important note - if running speed density, no concern). Keep in mind that any air introduced to an engine (intake AND crankcase) must be accounted for if plumbing back to the intake in your crankcase evacuation setup. It is extrememly important to be certain you have no leaks, as it will throw off your fueling due to unmeasured intake air.Due to vacum being pulled on the drivers side valvecover from the supercharger (pre-rotor pack), you have a cross-flow effect on the crankcase, which helps to scavange out blowby contaminents, as well as pressure. The issue being experienced in the OP's setup ALSO means that your oil dranback from the cylinder heads to the pan is being negatively impacted. Carrying too much oil in the cylinder heads can lead to more serious problems.Lastly, if for any reason both -10 lines are overwhelmed with excess pressure, I also have this (Note: be sure to look up the correct applicable part!) which acts as both a free vent filter AND a PCV, as it has a large check ball in the baffle. This is mportant in my setup as it allows the system to pull vacuum until the system is overcome....if it is overcome....with pressure.<a href="https://www.amazon.com/CFM-Performance-1-0101-1-WB-Breather-2002-2017/dp/B00WVJ0FFI?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&smid=A301U6MQ0BGST3&gQT=1&th=1" target="_blank">https://www.amazon.com/CFM-Performance-1-0101-1-WB-Breather-2002-2017/dp/B00WVJ0FFI?source=ps-sl-shoppingads-lpcontext&ref_=fplfs&smid=A301U6MQ0BGST3&gQT=1&th=1</a></blockquote>