oil catch can install

[travail]

What is the best way to install one on a evo.

[123abc]

Is it not the same as DSM's?

[travail]

Originally Posted by 123abc

Is it not the same as DSM's?

I have never installed one so I don't know.

[123abc]

The way I did mine deletes the pcv valve. Just screw a nipple into it's place, run a hose from that and the other valve cover breather port to the catch can. Then have a seperate hose come in through the top of your can and go to your intake pipe.


I'm on a blow-through setup though, so I don't know how this would apply to you.

[travail]

so like this

[mlomker]

Interesting. On the X the stock line runs from the valve cover to the intake. When I install my AMS intake (which doesn't come with the inlet) I was just going to run the line to the catch can. I didn't think there was a need for an outlet on the catch can. Need to research that.

[Kracka]

Ideally you're going to want 2 catch-cans for a proper install and to maintain vacuum inside your crankcase.

VC breather ---> MAP crankcase vent (optional but recomended) ---> catch can ---> intake pipe

AND

stock PCV ---> catch can ---> MAP crankcase vent ---> intake manifold

http://www.maperformance.com/map-cra...acuum-kit.html

[travail]

Originally Posted by Kracka

Ideally you're going to want 2 catch-cans for a proper install and to maintain vacuum inside your crankcase.

VC breather ---> MAP crankcase vent (optional but recomended) ---> catch can ---> intake pipe

AND

stock PCV ---> catch can ---> MAP crankcase vent ---> intake manifold

http://www.maperformance.com/map-cra...acuum-kit.html

You really need two of them.

[Kracka]

If you want to route both the breather and PCV to a can then yes, you need 2. If you do just one can though then pick which of the above two is more important to you and go that route. I personally have 1 can setup between the VC breather and intake pipe.

[123abc]

Originally Posted by travail

so like this

Yes except you have the line going to the intake manifold, not where the pcv valve use to screw into the vc.

[Kracka]

Doing that, without any check-valves, is a terrible idea since you'll be pressurizing the catch-can AND crankcase during on-boost conditions!

[123abc]

Originally Posted by Kracka

Doing that, without any check-valves, is a terrible idea since you'll be pressurizing the catch-can AND crankcase during on-boost conditions!

There's no pressure in there, only vaccum. I have the 3rd tube going to the intake pipe, before the turbo with an inline filter.

[Kracka]

How is there no pressure when you have a line run directly from the intake manifold?

[123abc]

Originally Posted by Kracka

How is there no pressure when you have a line run directly from the intake manifold?

I meant to say he did it wrong, that line gets ran to the VC. I keep thinking DSM's where the pcv valve goes to the vc. Obviously that won't work hooked up to the intake manifold.

[Kracka]

Evos and DSMs have their VC breathers and PCV valves setup in the same way, just in different locations.

[t-revzr]

Originally Posted by Kracka

If you want to route both the breather and PCV to a can then yes, you need 2. If you do just one can though then pick which of the above two is more important to you and go that route. I personally have 1 can setup between the VC breather and intake pipe.

Do you have a pic of it under your hood?

[asshanson]

Why not have both the VC outlets go into the intake pipe? The PCV going into the intake mani is pressurized under boost so it does nothing. If they both go into the intake pipe the turbo will be sucking air out from both VC locations at all times. Granted this will probably look messier, but oh well.

[goodhart]

Originally Posted by asshanson

Why not have both the VC outlets go into the intake pipe? The PCV going into the intake mani is pressurized under boost so it does nothing. If they both go into the intake pipe the turbo will be sucking air out from both VC locations at all times. Granted this will probably look messier, but oh well.

And all that blow by going into the turbo? no thanks.

[123abc]

The 2 red hoses go to my catch can. Then the green hose goes to my intake tube. No pressure, only vacuum.

And all that blow by going into the turbo? no thanks.

Thats the point of a catch can dude, to catch the shit and suck out vapors. It's a better way of doing the same thing the factory did in my opinion.

[asshanson]

Originally Posted by goodhart

And all that blow by going into the turbo? no thanks.

Originally Posted by 123abc

Thats the point of a catch can dude, to catch the shit and suck out vapors. It's a better way of doing the same thing the factory did in my opinion.

This. Just run both VC vents into a single catch can and then to the intake pipe.