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Catch Can

LRyder

By LRyder,
in Engines & Forced Induction

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LRyder Rising Star

LRyder

Posted
Posted

Hey guys just a quick question for the tech heads.

Can I run an open to atmosphere with this style of catch can...

9c15_1.jpg

with a breather on the top next to a hose, and the other hose on the bottom.

Because I often see a open to atmosphere setup with two hoses either at the top or bottom with the breather totally separate. And was wondering is it an issue to have one hose at the top, and one at the bottom.

I will run it with steel wool style filter inside as well.

Just looking for some input.

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sIIgtst Rising Star

sIIgtst

Posted
Posted

Hey mate i run the same setup a similar setup as to what you are after just minus that bottom feed

i have a hose from one rocker cover breather to the other than one to one of the catch can fittings and

a filter of the second fitting works well for me.

so you could buy a different style of can or plug the bottom fitting and get you desired result

another can would be easier if you havent already spent your hard earned....

Just my 2 cents

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LRyder Rising Star

LRyder

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Posted
Hey mate i run the same setup a similar setup as to what you are after just minus that bottom feed

i have a hose from one rocker cover breather to the other than one to one of the catch can fittings and

a filter of the second fitting works well for me.

so you could buy a different style of can or plug the bottom fitting and get you desired result

another can would be easier if you havent already spent your hard earned....

Just my 2 cents

Yeh was thinking the one hose option, but was more wondering if 2 would work to increase flow from the different ports on the rocker covers.

This catch can is available fairly cheap, and I like the idea it is open-able

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  • 1 month later...
cmfr32 Apprentice

cmfr32

Posted
Posted
Yeh was thinking the one hose option, but was more wondering if 2 would work to increase flow from the different ports on the rocker covers.

This catch can is available fairly cheap, and I like the idea it is open-able

The bottom fitting should only be used as a drain because when the can starts to fill with oil it will be unable to breath.

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DCIEVE Mentor

DCIEVE

Posted
Posted
2 pipes at the top should be connected to your cam covers.

pipe at the bottom should drain to your sump.

You can leave a pipe off the top, but expect your bay to be covered in fine oil mist very shortly.

doing that just loops crankcase pressure...... you need some sort of breather either to turbo inlet, pcv+turbo inlet or to atmosphere

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Brockas Proficient

Brockas

Posted
Posted
doing that just loops crankcase pressure...... you need some sort of breather either to turbo inlet, pcv+turbo inlet or to atmosphere

assuming that breather to the turbo inlet is still connected...

Having said that, I vented my catch can to atmo because that turbo inlet pipe was pushing oil into the turbo on hard accel/cornering...

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Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted
assuming that breather to the turbo inlet is still connected...

Having said that, I vented my catch can to atmo because that turbo inlet pipe was pushing oil into the turbo on hard accel/cornering...

i.e. your catch can isn't do its job correctly.... baffle it with stainless steel mesh....

plumb back the catch can, atmo vent is stupid.. stinks in summer, and makes your engine bay all slimy

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GeeTR Grand Master

GeeTR

Posted
Posted (edited)
plumb back the catch can, atmo vent is stupid.. stinks in summer, and makes your engine bay all slimy

To add a little perspective, there are those who think, spending money on big efficient IC's and premium fuel... then ingesting your own det inducing oil mist under WOT is mindless too.

Some ppl vent their catch cans with a hose 1/2 down the car to stop oil engine... but it can make the rear bar oily.

Edited by GeeTR
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Brockas Proficient

Brockas

Posted
Posted
i.e. your catch can isn't do its job correctly.... baffle it with stainless steel mesh....

umm no, the oil isn't being pumped from my catch can, if my motor was breathing that much I'd be worried.

This is a picture of the line you need to block off if you're doing track work:

15iyo1.jpg

otherwise the oil in the rocker covers sloshes to that side on hard right hand corners and pumps oil into the turbo inlet.

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(OO)SKYLINE(OO) Grand Master

(OO)SKYLINE(OO)

Posted
Posted

If you have the pipe venting the oil fumes out ot the atmosphare you will lose abit of oil and will have to do some regular top ups.

Mine was like that so I just took it off and reconnect the hose how it should be like standard.

Do what Brockaz said in his first post.

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