Welcome to the North American Subaru Impreza Owners Club Saturday May 8, 2021
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 05-11-2018, 10:58 AM   #326
fleezy
Scooby Newbie
 
Member#: 436768
Join Date: Dec 2015
Chapter/Region: E. Canada
Location: Toronto
Vehicle:
2004 WRX
Silver

Default

can i make a 4 port catch can instead of 2 2 ports?
* Registered users of the site do not see these ads.
fleezy is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 05-11-2018, 12:09 PM   #327
Vancouver98STi
Scooby Specialist
 
Member#: 459287
Join Date: Dec 2016
Chapter/Region: VIC
Location: Vancouver BC Canada
Vehicle:
1998 JDM Impreza STi
V4 GF8 White

Question

Quote:
Originally Posted by KCRS01 View Post

when you use a closed loop system the oil just recirculates in the system, meaning, if it has dirt/contaminants it just go back to the engine.

while vent to atmosphere AOS vents the oil going to the pipe and going to the street. the dirty oil in the system is then completely removed and not recirculated.
Ummm.... there appears to be some sort of confusion here. Venting (or not venting) the PCV system to the atmosphere has nothing to do with where collected oil goes. These are two separate variables. The catch cans I use do not drain back into the crankcase, and it's a closed system... as Subaru originally intended it to be.
.

Last edited by Vancouver98STi; 05-11-2018 at 03:22 PM.
Vancouver98STi is offline   Reply With Quote
Old 07-20-2018, 09:45 AM   #328
VinceS2
Scooby Newbie
 
Member#: 353338
Join Date: Apr 2013
Chapter/Region: International
Location: Newcastle Australia
Vehicle:
2005 EVO 8 WRX + STi
gold

Default

Because of the length of this thread, I started a new thread with a guide on what the smartest way to do the catch can mod is on a standard TMIC setup. See https://forums.nasioc.com/forums/sho....php?t=2879743
Just figured it was appropriate to cross-reference this thread back to that one, for completeness.
VinceS2 is offline   Reply With Quote
Old 01-27-2019, 01:48 PM   #329
edmartin81
Scooby Newbie
 
Member#: 439201
Join Date: Jan 2016
Default

Thanks for the post. I've been debating whether to install one on my EJ. I knew catch cans were needed to keep the FA ports from gumming up, but I didn't consider oil vapor condensing in the intercooler.
edmartin81 is offline   Reply With Quote
Old 03-01-2019, 11:42 AM   #330
GK1707
Scooby Specialist
 
Member#: 373868
Join Date: Nov 2013
Chapter/Region: Tri-State
Location: Queens, NY
Vehicle:
'04 STi
WRB

Default

Anyone know the hose sizes? I'm reading 3/8 between and 1/2. I'll be running a 3 port catch can.

PCV and breather IN to catch can and OUT to turbo inlet
GK1707 is online now   Reply With Quote
Old 03-01-2019, 08:06 PM   #331
pcampbell
Scooby Specialist
 
Member#: 437670
Join Date: Jan 2016
Location: VT
Vehicle:
2005 2.5 SC OB

Default

On my valve breathers 1/2” work great. Snug and No hose clamps needed.
pcampbell is offline   Reply With Quote
Old 11-18-2020, 03:52 PM   #332
sebastian323
Scooby Newbie
 
Member#: 510671
Join Date: Jan 2020
Chapter/Region: SCIC
Location: California
Vehicle:
2006 WRX
Gray

Default

how about this idea - I run a three port catch can with two inlets , one inlet going to the PCV and the other inlet to the valve cover breather lines, and the outlet to the turbo inlet pipe.

EDIT: just read this :
Quote:
WRONG WAY: Disconnect the PCV<->Inlet line as well as the Crank Vent<->Inlet line. "T" the PCV and Crank vent lines together, and run the remaining end of the "T" to a single nipple on the inlet pipe. Cap the remaining nipple on the inlet. You'll be sending boost into places that definitely shouldn't ever see any. Bad idea.
I don't understand how t-ing the lines together is bad if they both ultimately share a junction at the turbo inlet pipe (which is under suction and not boost from the turbo) can someone elaborate.

also , as I understand vented catch can is not a god idea as it will allow unmetered air into the system
sebastian323 is offline   Reply With Quote
Old 11-18-2020, 05:13 PM   #333
Peaty
Techno Sapien
Moderator
 
Member#: 449
Join Date: Oct 1999
Chapter/Region: MWSOC
Location: Lawrence, KS
Vehicle:
2019 Impreza Sport
Lithium Red

Default

Might as well put this here ADD W1 CC on 2019 Impreza Sport

https://photos.app.goo.gl/rNGgBQvBkKaiYtjA6
Peaty is offline   Reply With Quote
Old 11-22-2020, 01:00 PM   #334
pcampbell
Scooby Specialist
 
Member#: 437670
Join Date: Jan 2016
Location: VT
Vehicle:
2005 2.5 SC OB

Default Catch Can FAQ

Quote:
Originally Posted by Peaty View Post
Might as well put this here ADD W1 CC on 2019 Impreza Sport

https://photos.app.goo.gl/rNGgBQvBkKaiYtjA6


Blast from the past— I used to work with Kastle (in real life). Do you keep up with him?
pcampbell is offline   Reply With Quote
Old 01-23-2021, 11:39 AM   #335
relic48
Scooby Newbie
 
Member#: 408588
Join Date: Dec 2014
Default

Just in case anyone is interested in 1957 "unmetered air" and emissions, scroll down to the 3rd paragraph in the article and look at the picture below it.

https://www.chevyhardcore.com/news/t...c-small-block/
relic48 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Catch can maybe reduce oil use? leighton1245 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 18 06-05-2010 06:38 PM
Oil catch can...or catch canS?? BoXinWRX Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 3 07-28-2009 05:01 PM
Installed OBX catch can... (another catch can thread) txl146 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 5 09-10-2008 01:00 AM
WTT(HR): Greddy Oil Catch Can with Perrin Oil Catch Can scooby_wooby MAIC Private Classifieds 1 03-24-2008 09:01 PM
WTT: Cusco catch can for a perrin catch can sti charles Engine/Power/Exhaust 10 11-29-2007 01:04 AM

All times are GMT -4. The time now is 10:40 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2021 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.