Is My Catch Can Install Correct?

[Hanaldo]

Yeh I sort of though that would be the case. But I would probably replace the steel wool (or at least clean it off) every now and then anyway, I'm a bit pedantic about the maintenance of my car

[PM-R33]

Yeah thats understandable man. I check my catch can every 5000km service and wash out the couple of mm or so of oil in there.

[fmlycar]

Old thread dig but who cares.

Considering purchasing a Perrin Air Oil Separator. Has anyone had anything to do with these on an RB? Was thinking of setting it up like this, both rocker lines in to can, pcv line to manifold blocked and rocker line from pcv valve to can, return from top of can back to intake and oil drain at base plumbed to turbo oil return. Thoughts?

Engine is rb25 and has been rebuilt to Nissan spec with internal oil control mods so currently healthy. I would like to keep it plumbed back and low maintenance if possible. Engine is in a RS4 stagea and is used daily with occasional drag use. No track days or gymkhana events to worry about.

Edited March 8, 2015 by fmlycar

[32GTRB]

Similar question here, except I mo longer have the pcv valve and instead am thinking of running two cans.

Would this set up work? The second can in the pic venting to atmo, but mine has a drain back to sump. Thinking of replacing the drain with a serviceable valve and then fitting a breather line back to the intake.

[KiwiRS4T]

That thing on top an air/oil separator? If so you want sump and cam cover breathers going into your catch can and instead of a vent on the catch can a line going through your air/oil separator to the turbo intake (nothing going to atmosphere). Catch can could have a drain at bottom going back to sump.

[32GTRB]

I think its an oil air separator in that it is "fed" fumes by the cam covers, and supposed to then drain the oil back into the sump and air into the intake.

However I think the consensus is that the air is dirty and so is the oil which is returned, so im thinking its better to have the air then directed into my second catch can, with maybe the oil going back to the sump?