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Catch Cans - Again

maccattack

By maccattack,
in Engines & Forced Induction

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thrtytwo Veteran

thrtytwo

Posted
Posted (edited)

i hate to bring up an old thread, especially one that already has SOO much info in it. i just cant be 100% sure im doing the right thing. and wouldnt want to go ahead without checking :D

post-22805-1161231543.jpg

is that ok to do on an RB20 ?

nothing blocked off, just taking out line that was there and plumbing it through the can ?

Edited by thrtytwo
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ebola Proficient

ebola

Posted
Posted

Think about what and where the oil is going... you would be catching the crossover between the breathers... so it would be 50% or a standard setup. I won't say it won't work... it might, I just don't think it would really be much use (especialy for the time, effort and money put in)

block off the ecv, and put the catch can on the other side (leave it plumbed to the I/C). 100% legal, better idling...

Of course, I have yet to do this...

thrtytwo Veteran

thrtytwo

Posted
Posted (edited)
Think about what and where the oil is going... you would be catching the crossover between the breathers... so it would be 50% or a standard setup. I won't say it won't work... it might, I just don't think it would really be much use (especialy for the time, effort and money put in)

block off the ecv, and put the catch can on the other side (leave it plumbed to the I/C). 100% legal, better idling...

Of course, I have yet to do this...

to be honets i dont know what any of the pipes are, this was just the idea i got from what ppl were saying :D and a few pics of RB25s

hate to be a painb, rekon you could whip up a diagram in paint or summin :) ?

pwetty pweese *pouts*

Edited by thrtytwo
HypeR33 Mentor

HypeR33

Posted
Posted

Hi Guys,

I am going to put on a 100% atmo catch can and have the filter installed remotely somewhere hidden with extra piping...will this still work?

Also from my sig you can see the pipe connecting the 2 PCV's is altered with an exit hose between them which at present just goes to the firewall and does nothing. Can I replace this pipe with one connected to the catch can? and not have it connected directly to the LHS PCV?

Cheers,

JB

  • 3 months later...
RustyR32Gtst Mentor

RustyR32Gtst

Posted
Posted
still wondering how to plumb to RB20. can sum1 post a pic of your setup with a greddy style can, or cusco, as long as it only has 2 inlet/oulets and not 3.

Yeah, i want to know as well.......... :P

  • 1 year later...
bumble_bee Rising Star

bumble_bee

Posted
Posted
Think about what and where the oil is going... you would be catching the crossover between the breathers... so it would be 50% or a standard setup. I won't say it won't work... it might, I just don't think it would really be much use (especialy for the time, effort and money put in)

block off the ecv, and put the catch can on the other side (leave it plumbed to the I/C). 100% legal, better idling...

Of course, I have yet to do this...

ecv?which side is his? inlet or exhuast rocker cover side?

can some post a picture up with this setup..

this sounds like the setup im going to do...

more info on his setup would b great..thanks

  • 3 weeks later...
dmr Mentor

dmr

Posted
Posted (edited)

hey guys,

i've just installed a catch can on my RB20DET, and did it the wrong way the first time.

the car was pouring out smoke which smelt like burnt oil, so i read up on this topic and followed SydneyKid's 50% plumback diagram:

rb25det50PlumbBack.jpg

i have a couple symptoms though:

the smoke pouring out the exhaust has stopped, but it still seems to have a very slight smell of burnt oil? i'm thinking maybe it's burning off the last bits from the previous installation?

i also noticed a strange ticking type sound which seems to be coming from the plenum area. the noise stops if i squeeze the hose coming from the plenum enough to stop the flow of air.

i've got a drift oil catch can, with 2 top hose fittings, and 1 lower.

i've used the lower one for the plenum, the top ones for the rocker cover (with the original "u" shaped one intact), and the return line for the intake pipe has been blocked.

does anyone have an idea?

Sydneykid where are you?!

thanks,

dave.

Edited by dmr
  • 1 month later...
W0rp3D Grand Master

W0rp3D

Posted
Posted

would it make a difference if i block the line going from the rocker cover to the inlet manifold and then run the other 2 lines to the catch can and plumb them back to the turbo inlet or should i run the manifold pipe through the catch can as well and then a return to the manifold?

  • 7 months later...
Neejay Explorer

Neejay

Posted
Posted
Thats ok if you just want to remove oil any oil from entering the intercooler but you should ideally plumb the PCV valve line to the catch can too.

I haven't found a way to do it with a catch can that only has 2 ports. The diagram I've seen is for a RB20 and I've read where people say it works differently between the 2.

Neejay Explorer

Neejay

Posted
Posted

Ah, ok. Thanks! So that would mean that I'd have to plug up the cam cover-to-intake ports? There's a post that says it would cause a boost leak if left there (I think).

Neejay Explorer

Neejay

Posted
Posted (edited)

This is what I was talking about doing: http://www.skylinesaustralia.com/forums/in...t&p=4337772

But are PCV valves specific? Like, if I get an inline one, will it flow/move the same amount of vapors as the thicker one made for this engine?

Edited by Neejay
  • 3 weeks later...
MoogLe Community Regular

MoogLe

Posted
Posted

I'd like to revive this dead thread cause i am confused as hell right now

this is how i have mine hooked up (I got it this way from japan)

tndsc01553rf9.jpg

So i'm thinking about running the atmospheric setup shown on in this thread and putting one of these types of filters between the PCV and the intake manifold, but the one thing that is leaving me in doubt is that some people claim that the atmospheric setup creates a vacuum leak in the system.... So what is it, will it or wont it create a leak?

Catch%20can%20assembly.JPG

i used to use one of those filters on my old car between the pcv and the IM and it worked great, collected allot of oil

Opinions?

Neejay Explorer

Neejay

Posted
Posted (edited)
I'd like to revive this dead thread cause i am confused as hell right now

this is how i have mine hooked up (I got it this way from japan)

tndsc01553rf9.jpg

So i'm thinking about running the atmospheric setup shown on in this thread and putting one of these types of filters between the PCV and the intake manifold, but the one thing that is leaving me in doubt is that some people claim that the atmospheric setup creates a vacuum leak in the system.... So what is it, will it or wont it create a leak?

Catch%20can%20assembly.JPG

i used to use one of those filters on my old car between the pcv and the IM and it worked great, collected allot of oil

Opinions?

I never got a response, so I'm going to run mine similar to yours, but I'll run 2 hoses separately from the valve covers -> T fitting as close as possible to the catch can -> into the catch can + stainless-steel scrubbing -> and out to the intake pipe. I think I'm going to just cap off the PCV valve and the intake manifold nipple.

Edited by Neejay
MoogLe Community Regular

MoogLe

Posted
Posted (edited)

the way your describing it makes the catch can sound kinda of pointless really but maybe i'm understanding it wrong

and what benefit would capping the pcv valve rather than than putting a filter like i described have? the way i see it, the pcv valve is there for a reason isnt it?

Edited by MoogLe
Neejay Explorer

Neejay

Posted
Posted (edited)
the way your describing it makes the catch can sound kinda of pointless really but maybe i'm understanding it wrong

and what benefit would capping the pcv valve rather than than putting a filter like i described have? the way i see it, the pcv valve is there for a reason isnt it?

No, it's basically like what you currently have, but instead of the hose going to the other valve cover, it will go straight towards the catch can, then BOTH valve hoses will combine via T fitting right before going into the catch can.

A filter instead of the PCV valve cap will cause fumes and look less clean, in my opinion. I may try to find a plug and just take out the PCV valve all together.

EDIT: If you have a 2nd picture, I can't see it. What filter thing are you talking about?

Edited by Neejay

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