Jump to content

Oil Catch Cans


Dicky

Recommended Posts

Are there different types of catch can or are they all the same. Watched a YouTube video who referred to it as  “vented” ??

Also what’s the difference between 2 port and 3 port cans (please don’t say 1 port :))

Edited by Dicky
Link to comment
Share on other sites

Thanks Davey but I thought the pcv outlet was at pressure and so needs to be vented??

Bern looking at You Tube vids which seem to using a vented catch can...I’m confused now!

Edited by Dicky
Link to comment
Share on other sites

Be sure you're not looking at a boosted setup. The n/a OE set up is a closed system utilising the engines vacuum to draw out the oil vapour re burning it. The catch can plumbs into this closed system catching the oil vapour, therefore venting to atmosphere doesn't draw out the crankcase pressure nearly as good as a closed vacuum set up.

 

300-MMBCC-350Z-02PBE-3_6.png.76b8637b3f64ea8643d5c623258f4e44.png

 

2.jpg.0735bb1a296ad8187d78bd2fc9b91a2a.jpg

 

Same principle for our VQ35's using a 2 port unit. 

Edited by davey_83
  • Like 1
Link to comment
Share on other sites

Thanks so much for your efforts Davey, now I get it and the diagram really helps.
I’ve had my car for 15yrs now and it’s probably to late but thought I might fit one  just to help the old gal along a bit n her old age. Luv that car!!

ps: just had a thought you may be able to advise on.

im thinking of running a tube from the PCV and one from the tube which currently connects to the air intake pipe just before the Throttle valve, th t

”teeing” them together into the in port of the catch can, then a tube from the out of the catch can to the plenum vacuum pipe.

Do you see any problems with this?

Edited by Dicky
Link to comment
Share on other sites

I understand the thinking and that would be similar to the ARC catch cans. I would prefer to keep the low and high sides of the system separate as Nissan intended. At wide open throttle the vacuum in the intake becomes atmospheric and shuts the PCV off. Combining the low/high sides could result in excessive oil draw at idle, feeding off both ports.

  • Thanks 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...