Catch Can Debate

[03Z33]

Will read through the thread later when I have more time but didn't see these mentioned:

New Cusco vertical catch-can/separtor with internal partitions:



http://www.cusco.co.jp/en/parts_prod...ta_86_sub.html

ARC catch can (this one drains to the oil cap also)

http://www.arc-brazing.co.jp/carlineup/toyota_86.html

Revolution catch can:

http://revo-tune.jp/catalogue/detail.php?id=284

Revolution also offer oil pan baffle plate:

http://revo-tune.jp/catalogue/detail.php?id=322

[Dezoris]

You absolutely do not want to re-route PCV vapor back to the oil cap. Its a gimmick at best.

If you are ok with unburned fuel, blow by oil and water vapor in your oil pan then go for it. Even if by chance gravity actually drains the can back to the oil cap its a horrible idea and design.

[mad_sb]

Originally Posted by King Tut

I went vented:

...

Can I ask why without offending you?

The way you have that setup, from what i can see anyway, does not look like your can is going to catch anything since nothing will circulate through it. I think it would do the same thing to remove the can and put little filters on the nipples on the block.

[wbradley]

[QUOTE=03Z33;699911]New Cusco vertical catch-can/separtor with internal partitions:



http://www.cusco.co.jp/en/parts_prod...ta_86_sub.html

And it lookls like its connected between the front crankcase vent and the intake behind the air box.
I wonder why they keep showing it connected this way. Is it something to do with forced induction installs or what?

Please somebody that knows difinitively, confirm the can is supposed to go between the PCV and manifold.

[mad_sb]

[quote=wbradley;700461]

Originally Posted by 03Z33

New Cusco vertical catch-can/separtor with internal partitions:


http://www.cusco.co.jp/en/parts_prod...ta_86_sub.html

And it lookls like its connected between the front crankcase vent and the intake behind the air box.
I wonder why they keep showing it connected this way. Is it something to do with forced induction installs or what?

Please somebody that knows difinitively, confirm the can is supposed to go between the PCV and manifold.

If you want full coverage you need two cans, one on the intake manifold side and one on the intake side. They are just show it that way in the picture. If you only want to do a single can, do the manifold side like i did above, that is where the majority of the crank case vapor will circulate (except when WOT).

[King Tut]

Originally Posted by mad_sb

Can I ask why without offending you?

The way you have that setup, from what i can see anyway, does not look like your can is going to catch anything since nothing will circulate through it. I think it would do the same thing to remove the can and put little filters on the nipples on the block.

I don't expect it to catch anything. I am hoping my oil stays in the crankcase where it belongs. If any oil does come out, then I want it to be caught in the catch can. Trust me, I can smell the oily air through the filter. I still feel like this is the best solution for a turbocharged car until someone shows me proof that adding a vacuum line from before the turbo to put the crankcase under vacuum, will increase horsepower.

[mad_sb]

Originally Posted by King Tut

I don't expect it to catch anything. I am hoping my oil stays in the crankcase where it belongs. If any oil does come out, then I want it to be caught in the catch can. Trust me, I can smell the oily air through the filter. I still feel like this is the best solution for a turbocharged car until someone shows me proof that adding a vacuum line from before the turbo to put the crankcase under vacuum, will increase horsepower.

Sounds like you have used similar setups in the past on other vehicles?

I'm not suggesting pulling a vacuum on the crank case will increase power, though i know lots of people make that claim and it doesn't take much consideration to understand the theory.. a piston traveling down the bore working against 20 PSI of pressure against the under side of the piston will have to work harder than a one moving through vacuum.

My preference is based on what i have observed on the dyno (dip sticks popig out, oil spewing all over the place, oil film covered engine bays, excessive oil smoke) and the theory behind why we have pcv systems in the first place (to prevent sludge buildup for one).

IMO the reason for a closed system is to scrub the oil vapor out of the crank case gases. If you had an open system that actually did that i think it would probably be superior to a closed system because you would not be re-circulating any of the other vapors.

[King Tut]

Originally Posted by mad_sb

Sounds like you have used similar setups in the past on other vehicles?

I'm not suggesting pulling a vacuum on the crank case will increase power, though i know lots of people make that claim and it doesn't take much consideration to understand the theory.. a piston traveling down the bore working against 20 PSI of pressure against the under side of the piston will have to work harder than a one moving through vacuum.

My preference is based on what i have observed on the dyno (dip sticks popig out, oil spewing all over the place, oil film covered engine bays, excessive oil smoke) and the theory behind why we have pcv systems in the first place (to prevent sludge buildup for one).

IMO the reason for a closed system is to scrub the oil vapor out of the crank case gases. If you had an open system that actually did that i think it would probably be superior to a closed system because you would not be re-circulating any of the other vapors.

Figured I would update you. I drained my catch can for the first time since I installed it in January. I have been boosted for a couple months now. It had about 8 ounces of the same looking liquid as this video:

[ame="http://www.youtube.com/watch?v=arKumsxHx-8"]Subaru catch can contents - YouTube[/ame]

It is mostly condensation mixed with oil.

[Hanakuso]

Saikou Michi needs to release there setup soon..

[reeves]

Originally Posted by ATL BRZ

I run a Moroso

Internal baffling, easy to drain, no rattles.

Did the included hoses on the this Moroso fit your BRZ pcv inlet? Did you just use the stock hoses, or did you need to buy completely new hoses? TIA!

[ATL BRZ]

Originally Posted by reeves

Did the included hoses on the this Moroso fit your BRZ pcv inlet? Did you just use the stock hoses, or did you need to buy completely new hoses? TIA!

The included hoses fit the stock pcv hoses! Gotta trim them both down and use hose clamps at the connections.

Make sure you tap into the rear pcv for the majority of the blow by, not the front vent that goes to the intake.

[reeves]

Originally Posted by ATL BRZ

The included hoses fit the stock pcv hoses! Gotta trim them both down and use hose clamps at the connections.

Make sure you tap into the rear pcv for the majority of the blow by, not the front vent that goes to the intake.

Yea I saw your 'corrected' PCV connection on the previous page.. thanks for the heads up! Did you catch any oil yet after you corrected it?

[Xdragonxb0i]

Does anyone have a picture of a catch can sitting right next to a lightweight battery?

[ATL BRZ]

Originally Posted by Xdragonxb0i

Does anyone have a picture of a catch can sitting right next to a lightweight battery?

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