Catch Can Fabrication
I've had a breather tank for a while, it functioned fine for day to day use and was small enough to fit easily in the engine bay. It had small fittings ( I purchased it from a race shop, I believe it's really for a kart), but I ignored that and used it anyway. At the last few track days at PIR I was getting smoke at the end of the long straights.
Turns out there was too much crankcase pressure and it wasn't allowing the oil to return to the crankcase from the turbo drain as well as whatever else makes the engine smoke when the crankcase is not ventilated enough.
I did quite a bit or research on breather tank (vents to atmosphere) vs. catch can where the pressure is routed back to the intake. I decided to go the catch can route as the vacuum from the intake helps pull the vapors/pressure out and keeps me from smelling the vapors that used to come out the filter of the breather tank. The majority of the oil/vapor mix will condense in the catch can and will not be pulled into the intake.
Piece of 3 inch exhaust tubing and flat stock for the baffle
Baffle in place
Drain in place
Fittings in place. 2 on the side from the engine, one larger one that will lead to the intake prior to the turbo inlet.
Stainless steel filter media. It's not really filtering anything, it just functions as more material for the oil vapor to condense on.
I filled up both sides to the top (unlike this picture).
Finished catch can
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