[Joshboody]

the more i think about it, the bsh design is pretty poor. This is my first experience with an OCC, so I didn't know any better when purchased and much was based on reviews. But again, aluminum plate with holes... what prevents the oil vapor from passing right through it.

put a filter on the exit side and see how much oil is caught... this would be a good indication of the performance.

I'm sure BSH would like to keep a good name in the N54 community cause they do a lot of work for various german platforms... I wonder if there's a semi-easy fix... popping the top and inserting a better oil catcher.

I do kinda like the steel wool idea, but i'd do some tests first... maybe a cup with oil poored over the top filling the cup about halfway and see the air flow.

[dzenno]

That's just proof your car doesn't have much blowby due to good ring seals..if you really want to prove it "doesn't" work try another occ and compare OR even better, take your BSH occ and out it in a car that has blowby collected not sure how feasible any of these are for u obviously

[Jeff@TopGearSolutions]

My Riss Racing's gets gobs of oil. No complaints.

[Joshboody]

Originally Posted by dzenno

That's just proof your car doesn't have much blowby due to good ring seals..if you really want to prove it "doesn't" work try another occ and compare OR even better, take your BSH occ and out it in a car that has blowby collected not sure how feasible any of these are for u obviously

It can be both reduced blow by and also cyclones working better than others. I've never had to add oil between changes and i've heard many people do. I have very little oil in my OCC.

BUT, oil in the outlet side is not a good sign though. I'll check mine soon.

[Big Tom]

I've said it before, and I will say it again;

IMO, an OCC with a breather is the best of two worlds.

- Absolute NO oil, dirt and moisture going back to the intake.

- Almost no oil mist in your engine bay, which usually is the result with a simple crankcase breather.



If I were you, I would've put a breather on the outlet on your BSH and plugged the connection on the intake.

Here's my $34 DIY OCC with a breather:

[dzenno]

Breather doesn't provide the vacuum required to pull the crankcase vapors on decel and off boost applications...I really think the only reason here is his engine has better seals and doesn't allow much blowby, so a good thing

[N54_Fan]

I have been researching this OCC thing for quite some time as I have had the Riss Racing OCC for about 32K miles and have 40K miles on car now. I have noted it leaking as others have and sealed all the leaks with moderate success. I WAS getting oil in the OCC but a lot was leaking/spraying into the engine bay. Cleaned everything and now better with seals on OCC,...still only a little oil in it and still leaking but better. As many have mentioned we SHOULD require a closed circuit with vacuum to get adequate suction of oil vapors prior to entering the intake. A filter SHOULD not allow this as this would be essentially an open system and not allow sufficient vacuum to pull off oil vapor. Finally just yesterday I took my car to get FMIC installed and I wiped my finger across entire intake pipe and deep into it in case any "settled" down in there and there was virtually NONE!! Only small film of olive oil looking stuff deep in the base of intake pipe. This was not visible to naked eye but seen only as an oily sheen on my finger.

So, ...this led me to 3 conclusions #1) OCC HAS been effective in preventing oil in intake pipe despite the leak and poor design!! #2) that the spraying of oil into my engine bay was essentially an "open" system with NO Filter and this was also effective at pulling oil off. #3) that it probably does not matter whether one has an open or closed system as long as one has an OCC that has wide enough piping and not narrow ones like the Riss Racing one....not sure of BSH size pipes. I have been looking at getting this OCC and trying it out as well. Also, I like this because it has a dipstick instead of a "window tube" that has been the main source of leaking for my OCC. I will probably order this this week and try it out. I realize this company focuses on VW and Audi but its an OCC,... it should be fine for any car.

http://www.42draftdesigns.com/catego...catchcans.html

[aus]

Damn. I have one in the box and was about to install it!!
It also didn't come with instructions...

Like someone else said, I'm wondering if we could stuff some steel wool on the intake side.
A better test would be for someone who gets oil all the time in a can to install this one and see what they get.

[N54_Fan]

Actually just ordered it... I will post pics when I get it and install it and then of course after a few thousand miles of use.

[vasillalov]

Both 42DD and BSH are well known in the VW/AUDI community. When I was shopping for an occ, BSH had a N54 specific kit, so that's why I ordered it. I probably should have went with the 42DD one.

[ianthegreat]

Buy a proper catch can and it will work.

http://www.e90post.com/forums/showthread.php?t=264857


Here's a dissassembled pic http://www.srt8oc.com/forums/showthread.php?t=10542

[N54_Fan]

Originally Posted by ianthegreat

Buy a proper catch can and it will work.

http://www.e90post.com/forums/showthread.php?t=264857


Here's a dissassembled pic http://www.srt8oc.com/forums/showthread.php?t=10542

That's great but I think that company is out of business as all links to purchase are not found and a Google search for the company only turns up blogs like this one and no company website that I could find. Also the business' phone number is now someones home number.

[Tzu]

Interested.

[Mr. 5]

That's pretty cool but Hotrod182 found that he lost power when installing the breather.
Just something to add to the mix.

Originally Posted by Big Tom

I've said it before, and I will say it again;

IMO, an OCC with a breather is the best of two worlds.

- Absolute NO oil, dirt and moisture going back to the intake.

- Almost no oil mist in your engine bay, which usually is the result with a simple crankcase breather.



If I were you, I would've put a breather on the outlet on your BSH and plugged the connection on the intake.

Here's my $34 DIY OCC with a breather:

[Big Tom]

Originally Posted by Mr. 5

That's pretty cool but Hotrod182 found that he lost power when installing the breather.
Just something to add to the mix.

Yes, that's interesting...
So far I haven't felt any power loss at all. My car has never felt stronger than it is right now.

[Former_Boosted_IS]

I think it is premature to say it doesn't work to be honest, but maybe it is a worth exploring how we could improve its effectiveness? I know it is definitely possible to get steel wool into the intake side of the OCC or though the drain plug. Any idea if this might help?

The thing is the BSH design has been very effective on the Audi/VW community. What makes our care so different?

[Zasquatch]

Originally Posted by vasillalov

Both 42DD and BSH are well known in the VW/AUDI community. When I was shopping for an occ, BSH had a N54 specific kit, so that's why I ordered it. I probably should have went with the 42DD one.

Anyone try one of the 42DD units? 3/4" OD inlet/outlet sounds pretty good, and the 3 baffles inside look like they would be pretty effective at seperating oil.

I got rid of my BSH as it was not catching too much and MAY have been causing a rough idle issue on my car.

[Alpina_B3_Lux]

Originally Posted by BayerischeMW

enrita: how is the AR OCC working for you?

I've had mine in the car for about 10.000km, and had around one finger width of oil in it when it was emptied last week.

Alpina_B3_Lux

[deadlyrhythm]

Quit bashing the guy.

There are so many variables that compound into different solutions. Mileage, engine condition, seal conditions, temperatures, pressures, design of the catch can, position of the catch can.

There will be NO catch can that captures 100% oil vapour. Why? Because there's no cooler to condense the oil vapours. The stainless steel fibers (wool) is an improved design out of the other ones I've seen.

What an ideal test would be, is someone who is capturing lots of oil in their current catch can, swap over to a different design and record your results. Nobody's going to do this though. (And it's not even an ideal test,)

My background is oil refineries - we do this sh*t everyday.

[WilliamE92]

Well before i reinstall mine i'll be stuffing it to the brim with steel wool

I'm just wondering how I can keep the steel wool inside the OCC without having to worry about getting it sucked back in through the intake side

[skim7x]

Originally Posted by WilliamE92

Well before i reinstall mine i'll be stuffing it to the brim with steel wool

I'm just wondering how I can keep the steel wool inside the OCC without having to worry about getting it sucked back in through the intake side

That's a good question, but also, don't stuff too much wool in there because you might increase resistance to flow too much and cause problems as well...

[Joshboody]

Originally Posted by WilliamE92

Well before i reinstall mine i'll be stuffing it to the brim with steel wool

I'm just wondering how I can keep the steel wool inside the OCC without having to worry about getting it sucked back in through the intake side

The aluminum plate runs down the middle, so just put the wool on the inlet side. I think it runs the entire can length... ask BSH to confirm.