Turbo Oil Catch Can

[scootarida1]

Here is a catch can I made for my car. It is made out of 2.5"x4"x3/16" aluminum tubing and some 1/8 aluminum plate. I used a band saw to cut the tubing to the shape I wanted and then used a press brake to cut the 1/8 plate for the top and side. On the inside, I used some of the aluminum plate and put it on a milling machine to drill the holes. I made two of these and sandwiched in between them is some stainless steel wool to help separate the oil from the air. These plates were tack welded on the inside and then the top was welded on.

All of the welds were done with a Miller Dynasty 200. The amperage was about 135-165 amps depending on the weld. AC frequency was at 90 htz and AC balance was at 70. 3/32 black tungsten with a #6 gas lens at 20 cfm. I also used 3/32 5356 filler rod. Also in the pictures you can see that I cut the plates about 1/16-3/32 of an inch smaller than the actual dimensions in order to get a nice flush weld.

[jakeru]

Nicely done, and thanks for the design ideas! I need to make something similar for my race car. I have the blowby going "direct to atmosphere" and, it's a little stinky and drippy. Keeps the intercooler and boost tubing nice and dry set up that way though. I figure it can only help with cooling efficiency.

[scootarida1]

Yeah I was going to just vent it to atmosphere but I figured since its a dd it would help by using the intake to create a vacuum to pull the air through. If the oil is actually being separated from the air then I don't see a problem by doing this since it will just be caught in the can. So far I haven't seen any blow by so I will assume its working. I will check next oil change.

[Zmechanic]

Yeah I was going to just vent it to atmosphere but I figured since its a dd it would help by using the intake to create a vacuum to pull the air through. If the oil is actually being separated from the air then I don't see a problem by doing this since it will just be caught in the can. So far I haven't seen any blow by so I will assume its working. I will check next oil change.

Nice work on the catch can.

Just a curious question... But under higher boost conditions, wouldn't the manifold pressure be a decent amount above atmospheric pressure, while the crankcase should be near(ish) atmospheric pressure, causing air to flow out of the manifold and into the crankcase? Am I missing something, or is this kinda backwards from what you were hoping it would do?

[scootarida1]

the catch can is only hooked up to the crankcase breather and the valve cover breathers.