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So my home depot exhaust side catch can was both a success and maybe a failure. I'm getting lots of oil smoke when shifting after boost. I'm wondering if blowby is going out the valve cover and then getting sucked back in. I'm going to try a confusing check valve setup and see if I can get it to stay clean. But otherwise the catch can has been catching a lot of oil.
I highly recommend keeping the PPF. Anyone using a PPF isn't sorry with the results of controlling the suspension.
I can show you how we cut and built an adapter for mine. Really isn't tough to do - especially with all your ninja fab skilz
Interested in seeing yours I've decided I have to cut my PPF down to about 40 inches forward of the center of the front diff bolt hole to make mine work, and bolting something to the PPF there at the top is going to be hard because there's not much surface.
Your picture is odd, and not just because it gives Picasso seizures, but the filter and catch can relative location are weird. Usually you have a line going from the vc to the catch can and then the filter. This drops most of the oil in the can before it gets vta.
Please take pictures ILO drawing them so I may understand more betterer.
So what I currently have is what you described. But i think its sucking oil back out. So I want to add check valves. Green arrows are check valves. Lets air out into the catch can, but keeps the air fresh that comes in.
Had an excuse to do some welding today. 304ss to 409ss
I don't think check valves are necessary. Just make sure that the hose going to your catch can has a nice, gentle fall from the valve cover to the can without any low spots. Just like with the turbo oil drain, you do not want oil pooling in the hose.