Quote:
Originally Posted by pluckracin
yeah this oil catch can has a separator plate with a down tube thru the center and a stainless screen below that, the subaru race guys use this and it works great, two sight glasses to watch it work... 
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LOL! No intention of insulting you....just sharing info as you paid a premium to have a car as awesome as a ZL1. Tell you what....test it for yourself. spend $8-10 for a clear glass inline fuel filter and install it between your intake manifold and the can outlet and watch how much oil this can lets past. It looks great, and even a beer can with 2 fittings in (yes, we tested that as a joke and were surprised how much oil it caught) will catch oil...any container that allows cooling will condense some of the oil out of the crankcase vapors.....but the idea, especially with a DI motor is to trap ALL the oil, not just a small portion of it. All I'm doing is sharing with you the functions and how to test for yourself. Dont take my word for any of it (yes, we have that same can disected in house on display with the other dozen or so we test).....do it and see for yourself.
It is far better than no can at all so your helpping a portion of the issue, but you want no oil in your intake air charge. Especially with a ZL1 as you want no oil residue build up on your blower rotors as over time the build up throws the balance off....and then the intercooler is mounted below the blower and this si what happens to it in short order as the oil bakes on the fins, etc: