Crankcase Vents - Catch Cans

[milKt]

What are you guys using for crankcase vents? Are you dumping to atmosphere? Using a catch can? Im dumping to atmosphere under the car though the stock vent on the OBDII cover. Im finding I need to use a catch can but not too crazy about it. Choosing the right can in key.

Up for suggestions!

I have loose rings for FI
and three CC hoses/vents.

This can has one (1) 3/4 NPT breather port on top,
six (6) 1/2 NPT ports around the top cap
and size (6) around the bottom as well

allowing for many CC vents to attach.

http://www.jegs.com/i/Vibrant-Perfor...12689/10002/-1

[Jkpgt96]

I have each vc modded on mine and run to a vented catch can. From there I am going to change to dump the vent under the car instead of under hood.


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[NY98M3]

Anyone use this can before? Vibrant makes some killer shit, It looks to vent right out of the can though

https://www.summitracing.com/parts/vpe-12695/overview/

[rajicase]

God damn $145 for a can....

[NOTORIOUS VR]

Anyone use this can before? Vibrant makes some killer shit, It looks to vent right out of the can though

https://www.summitracing.com/parts/vpe-12695/overview/

It's a really nice part... really solid.

They also make a version with 4x AN fittings so you can vent elsewhere or recirculate, etc.

[Jkpgt96]

I just took mine with two ports and a vent port and added a fitting to the vent port so I could hook up a line and dump it under the car.


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[twirknolove]

I run mine though a cheap unbaffled ebay catch can then straight to the exhaust (JEGS crankcase evacuation kit). Catch can definitely fills up and no smoking from the exhaust.
Be sure to weld the bung in properly. No instructions are included and I believe 100% of the people who say this method doesn't work just welded the bung in incorrectly.

Up above 1.5k RPM, the exhaust evac sucks hard. I wouldn't run my ccv any other way.

Do you have a filter on the can itself or is it a straight shot from the VC to the exhaust with the can in-line?

[busterhax]

Do you have a filter on the can itself or is it a straight shot from the VC to the exhaust with the can in-line?

The latter. The expansion in the open can is enough to keep oil out of the exhaust.

[7808]

just throw your oil cap away. replace it with panty hose

[NY98M3]

It's a really nice part... really solid.

They also make a version with 4x AN fittings so you can vent elsewhere or recirculate, etc.

I may end up going with the Vibrant closed can, its a big can which makes it hard to place. Only place I can fit anything is right in front of the alternator/PS pump. I tried to fit a 4" piece of pipe in there, just fits.

[NY98M3]

There are certain parameters when to use an open and closed can, seems the open can is for a MAP based tune. Closed loop for a MAF based tune. Since we are MAF, I don't see where I could return it to since there is no pre turbo piping.

Im reaching out to Jordan to see if I can dump to atmosphere or use the evac port on the exhaust.

[NOTORIOUS VR]

There are certain parameters when to use an open and closed can, seems the open can is for a MAP based tune. Closed loop for a MAF based tune. Since we are MAF, I don't see where I could return it to since there is no pre turbo piping.

Im reaching out to Jordan to see if I can dump to atmosphere or use the evac port on the exhaust.

Doesn't matter to the MAF if you're running blow through. It's why you're able to run a BOV instead of a DV.

In draw through yes you would want to keep the PCV system closed and obviously not run a BOV.

[MrMuddle]

On a low boost M52 setup, about 8psi, would it be fine to run a long line with a breather filter from the CCV to the back of the car? I assume I'd need to stick with using a similar ID hose, so about 26mm?

[twirknolove]

On a low boost M52 setup, about 8psi, would it be fine to run a long line with a breather filter from the CCV to the back of the car? I assume I'd need to stick with using a similar ID hose, so about 26mm?

I'd literally use the biggest ID hose possible if you're going to be running one that long. Maybe even run a Y-split into two hoses. It's something I'm thinking of doing soon since I'm really starting to get over the oil/gas smells in the cabin.

[MrMuddle]

What about something like a one-way check valve and then route the CCV hose into the inlet mani? Or could it perhaps be routed pre-turbo intake(filter side) so it's re-used. I know that would effect the AFR's but on a standalone ecu(no MAF) that wouldn't be an issue, but would it be too much drawing on the vapours? I guess it would also depend on how much oil/sludge build up there'd be over time!

Personally I'd like to get the fumes either back into the engine(without clogging things up) or as far away from the cabin as possible if I can.

[twirknolove]

What about something like a one-way check valve and then route the CCV hose into the inlet mani? Or could it perhaps be routed pre-turbo intake(filter side) so it's re-used. I know that would effect the AFR's but on a standalone ecu(no MAF) that wouldn't be an issue, but would it be too much drawing on the vapours? I guess it would also depend on how much oil/sludge build up there'd be over time!

Personally I'd like to get the fumes either back into the engine(without clogging things up) or as far away from the cabin as possible if I can.

I'm on standalone system and as soon as I took off the pre-turbo intake plumbing of my catch can, my octane rating went up, fuel tables had to be adjusted, and I was given much more room to make more power, so yeah the oil vapors were hurting my performance. My catch can is baffled, but it doesn't have a sponge or anything strong filtering like the $200+ name brand stuff so that could of been a huge factor - though I still don't want any vapors in there.

The idea of a check valve into the mani is a good idea to test. Have a check valve into the intake mani and maybe T-off the same line into a can or atmosphere under the car?

[NY98M3]

Installing today....

Before I had a 3/4" hose coming from the stock connector at the valve cover which went down and dumped right next to the tranny

Now, Im trying to utilize the OE connector at the valve cover to keep it fresh looking, but I need to go down to 5/8" hose and utilize -10AN fittings on the can. Seems that the 3/4" hose would have less resistance but then get bottle necked at the can....

Anyone venting the lower crankcase? If so, from where? I have another -10AN fitting on the can I need to use.

[Butters Stoch]

I run a 1/2 hose from obd2 dip stick.

[rajicase]

I run a 1/2 hose from obd2 dip stick.

To your catch can?

[chikinhed]

Do you have an OBD1 or 2 valve cover?

I use to have a -10 bulkhead in the VC vent hole

Sent from my GTX3582R

[NY98M3]

I run a 1/2 hose from obd2 dip stick.

I think Id have to drill out the hole bigger on the stick that sits inside the oil pan.

Do you have an OBD1 or 2 valve cover?

I use to have a -10 bulkhead in the VC vent hole

Sent from my GTX3582R

OBDII, this can has provisions for additional lines, for now I just capped the in/out for the next set of lines.



The out on the can is going to a Moroso check valve to a Vibrant scavenger on the exhaust.

[Butters Stoch]

FU and your beautiful clean car.

[pbonsalb]

I think Id have to drill out the hole bigger on the stick that sits inside the oil pan.

1/4 inch right through the shaft inside the pan.

[NY98M3]

FU and your beautiful clean car.

Sorry, I wont post anymore pictures lol



Whoops!

1/4 inch right through the shaft inside the pan.

Ill try opening it up more.

[Matutino]

Looks great, I love my catch can as well...




Clean vs cleaner!!