Air Oil Separator Vs. Catch Can Part 2 - What we learned after going to the track 

Watch this video for a second time and still am learning Thank you guys!

Excellent video peace ✌️ and much respect to you 👍 JASON

I know video is a few months old.... but, if this is a dedicated track car, venting to atmosphere may be your answer. Your engine bay will be coated with oil despite the filter. If this is a street car, a catch can is your answer. A larger catch can is what you're going to need based on your consumption. It is normal to use that amount of oil on the track. You may want a heavier weight oil for the use on track and changing it when going back to the street. Also, you're seeing water mixed with your oil, the catch can is doing its job. As the oil heats up it is boiling off moisture and going to the can and back to water. At the same time oil mist is carried out of the crank case(with other vapors) to the can which mixes with the water. BTW, nice job detailing your experience on and off track.

Jesus how can I not subscribe? These videos are amazing.

Interesting about how the PCV works for a WRX to a dual can setup for a 2.5 STi Motor . You may be able to use two cans on a WRX by splicing the PCV connection hose from the tree to the manifold and placing the can between the tree and valve. PCV valve to can / to tree then take the crankcase hose from the turbo inlet and unhook the tree to turbo inlet and tee it with the crankcase hose that runs off the intercooler into a can . Then the can to the turbo inlet for fresh air back into the turbo. Just don’t forget to plug the hole left in the turbo inlet from the tree. Let me know if that sounds correct.

Id love a video tour on your Bugeye and its current setup and plans.

love learning, and watching from these videos. Some of the best of the Net

always AOS for turbo cars. If you boost a ton you will constantly fill the can and will be too much hassle to maintain. Also if you run E85 some AOS are designed to evaporate the moisture off the oil due to E85 water content.

The tube that puts the oil in the bottom of the can that they added in video is ridiculous. Why would that tube need to be added to get the oil to the bottom? Does gravity fail to apply inside the catch can? If you are concerned about gaseous oil being sucked straight through, you would need a baffle plate. So you had a good idea to put steel wool in but the tube is moronic. In essence what that tube does is create a siphon as soon as enough oil fills the can to cover the end. The small holes to vent are limited in velocity because they are too small and do nothing to prevent the tube from filling up. Once the tube is full of oil, the oil is sucked out of the crankcase instead of blown out and every turn that puts oil in the valve cover is now being sucked out. Did any CFD get done to prove the vent holes in that tube would actually prevent the scenario I just described? What about a fluid dynamic free body diagram? How long were you on the track? 10 - 15 minutes? That means you would be burning oil at a rate of 2 quarts/hr. You'd be empty in 2 hours. If that were the normal mode of operation, without a catch can, there would be so much particulate and hydrocarbon exhaust that the car would never pass emissions even at a spirited non-track type pace. Common sense guys. Turbo cars run 8, 12, 24 hour races. They aren't all dry sump so how are they keeping oil in their engines? Easy, they aren't siphoning it out with some idiotically modified catch can. Surely, this can't be the basis of your logic.

Great video

I'm wondering what I can do to eliminate oil and other contaminants from going into my intake and building upon the back of my intake valves and turbo blades and I'm sure cylinder portion heads rings and I'm sure the exhaust side as well. Oil separator or catch can. What one would work better in my DGI engine? DGI is a problem for carbon build-up and performance.on a DGI engine.

I recently let my catch can overflow not due to laziness but due to the musturding of the water and oil combination in the catch can. I was emptying my catch can on a very regular basis but didn't realise that every time I emptied it, it was leaving behind a thick substance in the can that I couldn't see in the can that was taking up valuable space. I was simply pouring out the liquid and reinstalling the can. Anyway, it overfilled recently and I also got a ton of smoke suddenly from the tailpipe. Now my car is backing off timing by 9.5 degrees under boost. I've cleaned the intercooler, turbo, intake and throttle body and next is to replace the plugs because they have to be shot! My question to you is, what else do I need to do to get everything back to normal and safe to run? Any help would be appreciated.

Very interested in what the results come back on what's in the blow by. I've seen lots of discussion on that it's just water vapor that makes it look gunky like that

Would you do one on fuel stumble / the EJ fuel system?

I have a 2017 honda civic ext 1.5 turbo. Should I get air oil separator for my daily driving? It's a GDI as well

Rather have it and not need it than need it and not have it imo. I know ancient video lol

Okay...with all this being said....should I install an oil catch can on my high performance vehicle...yes/no...😐?

So far I have watched both of these videos. What I would find interesting is a compression check on this older subie. Ring sealing on one or more cylinders would add considerably to the oil blowby. Off course this would become more aggravated on the race track with sustained higher turbo ie; cylinder pressures. The brown/tan goo in the bottle, that you intended to send for analysis, is likely oil/water slush. This is often seen with head gasket failures but can also be a problem with frequent short trips in some cooler climates as crankcase condensation builds up and does not get a chance to cool off. If that tan goo became evident only after track day, you likely have a failing head gasket.

the problem is you vented back into the manifold instead of to atmosphere

I have a IAG AOS street series installed but i'm still losing oil? daily driven stock 2016 sti

what are you trying to say on the fender sticker .. it makes no sense.

Generic design catch can doing nothing great... What u really need is the catch can that allow return flow into the oil pan

I think these things are a hoax. If your engine is barfing stuff into the pcv system there is something wrong with your engine or the way it's setup.