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Forced Induction Forum
Discuss supercharging, turbocharging and even nitrous and water injection here.

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Old 04-16-2016, 02:41 AM   #1
mrbobmicjoe
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Share your Oil Catch Can Setup

Hey guys,
I know that a lot of E46 owners (especially those with FI) have been switching over to catch can systems in place of the junk CCV system. Im curious to see what setups people are running.

I have a closed loop system at the moment with a check valve, hooked up to a $15 ebay special catch can. My question is, does anyone have any experience with systems that vent to atmosphere?

Share your setup below
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Old 04-16-2016, 02:46 AM   #2
daniel_f.
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Quote:
Originally Posted by mrbobmicjoe View Post
Hey guys,
I know that a lot of E46 owners (especially those with FI) have been switching over to catch can systems in place of the junk CCV system. Im curious to see what setups people are running.

I have a closed loop system at the moment with a check valve, hooked up to a $15 ebay special catch can. My question is, does anyone have any experience with systems that vent to atmosphere?

Share your setup below
Venting into ambient will give fault maf readings and therefore problems with engine smoothness, most probably stalling issues and lambda regulator difficulties
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Old 04-16-2016, 02:51 AM   #3
mrbobmicjoe
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Originally Posted by daniel_f. View Post
Venting into ambient will give fault maf readings and therefore problems with engine smoothness, most probably stalling issues and lambda regulator difficulties
God himself has spoken!

I was curious about a system like this because im looking to get rid of the ugly distribution piece that the ccv hooks up to (part #5 on the diagram). Since the catch can setup outputs mostly clean air back into the intake, could i plug up the 6 return ports on the intake manifold, and run a single line from the can back into the intake manifold?
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Old 04-16-2016, 04:29 AM   #4
daniel_f.
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Probably the best way is M56 valve cover to get rid off of all this emissions stuff.

I met a friend a few days ago and hes using a catch can forever with venting back into intake, his frickin oil refill cap is as new! Not a single bit of carbon build
up
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Old 02-12-2017, 08:36 AM   #5
eemil
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Quote:
Originally Posted by daniel_f. View Post
Venting into ambient will give fault maf readings and therefore problems with engine smoothness, most probably stalling issues and lambda regulator difficulties
How would you solve this? MAF before turbo and recirculating blow off valve?

What kind of catch can do you recommend? Where do i need a check valve?
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Old 02-13-2017, 11:12 AM   #6
cwarel
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Well i got catch can installed , i completely removed ccv , the valve cover bung i placed a hose going to oil catch can and on the other side i ran to that distribution thing ( also it has a 1 way valve with flow restriction)
So far I check on it and I had margarine and I was amazed how much it was in such a short term ( oil catch can was full of it ). So what happened I think is that since its cold outside , water condensates inside of the oil catch can , and when oil vapors come through they are accumulate with water . Since you are driving everything rattles and shakes , so that caused water and oil to mix and produce margarine which is disgusting. So honestly I think Oil catch can in cold climate is a no no, unless you willing to check on it every so often like me.
Ill post pictures of mine in a little bit

Last edited by cwarel; 02-13-2017 at 11:12 AM.
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Old 02-16-2017, 05:56 AM   #7
eemil
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Originally Posted by cwarel View Post
Well i got catch can installed , i completely removed ccv , the valve cover bung i placed a hose going to oil catch can and on the other side i ran to that distribution thing ( also it has a 1 way valve with flow restriction)
Some pictures would be nice! Also what kind of valve did you use?
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Old 02-16-2017, 03:26 PM   #8
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I just run mine out the valve cover to a vented can. When I had it all checked valve up to work under vacuum it kept getting clogged. No issues with it this way so far.


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Old 02-17-2017, 07:22 AM   #9
eemil
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I just run mine out the valve cover to a vented can. When I had it all checked valve up to work under vacuum it kept getting clogged. No issues with it this way so far.


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I think i will run the same setup, any negative about it? How is the idle?
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Old 02-17-2017, 12:24 PM   #10
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It's not a vacuum leak so it's unaffected


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Old 02-17-2017, 01:29 PM   #11
eemil
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It's not a vacuum leak so it's unaffected


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Thanks!
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Old 02-19-2017, 08:26 AM   #12
SoloII///M
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I'm running the Moroso catch can that is made for (I believe) the E36. Works perfectly on my E46.



The catch can is plumbed inline with the crankcase vent in the valve cover and the vacuum source at the back of the (M50) manifold plenum. Could easily do the same thing with the M54 manifold. I usually capture a couple ounces of oil after a race weekend. The catch can has a valve at the bottom for easy draining.

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Old 02-19-2017, 08:29 AM   #13
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Old:


New:

(actually the catch can is removed, I installed the M56 valve cover that has a built-in air/oil seperator)
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