Catch Can Gurus Help!

Faster_Gun · 09-27-2012, 04:00 PM

I seem especially dense today and am having a hard time figuring out how I should configure my catch can with only one nipple on the turbo inlet. I'm sure I'm over looking something, help me find it!

Yellow are T's

Currently (which I think is wrong...):

What I want to do, but feels wrong:

Feels better, but oil mist all in my bay?

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sfk1412 · 09-27-2012, 07:20 PM

http://forums.nasioc.com/forums/showthread.php?t=754710

This should answer any questions as well as how to hook it up.

Faster_Gun · 09-28-2012, 11:59 AM

Yeah... It doesn't. I don't have enough inlet nipples. If I don't vent one to atmo I wind up sucking straight into my inlet. Of course this is no better then what I have currently...

I need sleep.

sfk1412 · 09-29-2012, 09:44 PM

What turbo inlet do you have? on the stock inlet there's a nipple for the pcv. That's where your lost. I think.... i know perrins v1 inlet doesnt have a nipple for the pcv and you have to T it into your head breathers. picture number three would be the way you would do it. That's what I would imagine atleast

03sportwagon · 09-30-2012, 12:14 AM

Here is link to my install
http://forums.nasioc.com/forums/show....php?t=2386740

Faster_Gun · 10-29-2012, 01:48 PM

The link above doesn't really help. It leaves me with a vent to atmo crank case.

Bump, I actually have time to do this now.

super_usdm · 11-02-2012, 03:37 PM

Make a new hole in your inlet and run two cans is the best way to do it. One can for PCV and one for breathers. Connecting the two systems is not correct. It'll be better to run only one system to the can and leave the other alone if two cans isn't an option.

The issue I had trouble understanding was why connecting the systems is bad. Excessive blow by in the crankcase can potentially cause air to be forced back into the breather vents- which should be under vaccum. Not only that but you are lowering the vaccum on each system if you t into the line because they both go into one nipple on the inlet which is creating the vaccum.

09-27-2012, 04:00 PM	#1
Faster_Gun Scooby Specialist Member#: 180217 Join Date: May 2008 Chapter/Region: MWSOC Location: Bingham Farms, MI Vehicle: 2004 WRX WGN 348whp 1980 Diesel Rabbit 35whp	Catch Can Gurus Help! I seem especially dense today and am having a hard time figuring out how I should configure my catch can with only one nipple on the turbo inlet. I'm sure I'm over looking something, help me find it! Yellow are T's Currently (which I think is wrong...): What I want to do, but feels wrong: Feels better, but oil mist all in my bay? * Registered users of the site do not see these ads.

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09-27-2012, 07:20 PM	#2
sfk1412 Scooby Newbie Member#: 290974 Join Date: Aug 2011 Chapter/Region: Tri-State Location: Houtzdale, PA Vehicle: 2005 WRX Wagon PSM	http://forums.nasioc.com/forums/showthread.php?t=754710 This should answer any questions as well as how to hook it up.

09-28-2012, 11:59 AM	#3
Faster_Gun Scooby Specialist Member#: 180217 Join Date: May 2008 Chapter/Region: MWSOC Location: Bingham Farms, MI Vehicle: 2004 WRX WGN 348whp 1980 Diesel Rabbit 35whp	Yeah... It doesn't. I don't have enough inlet nipples. If I don't vent one to atmo I wind up sucking straight into my inlet. Of course this is no better then what I have currently... I need sleep.

09-29-2012, 09:44 PM	#4
sfk1412 Scooby Newbie Member#: 290974 Join Date: Aug 2011 Chapter/Region: Tri-State Location: Houtzdale, PA Vehicle: 2005 WRX Wagon PSM	What turbo inlet do you have? on the stock inlet there's a nipple for the pcv. That's where your lost. I think.... i know perrins v1 inlet doesnt have a nipple for the pcv and you have to T it into your head breathers. picture number three would be the way you would do it. That's what I would imagine atleast

09-30-2012, 12:14 AM	#5
03sportwagon Scooby Newbie Member#: 252943 Join Date: Jul 2010 Chapter/Region: NWIC Location: boise id Vehicle: 2003 wrx sport wagon silver	Here is link to my install http://forums.nasioc.com/forums/show....php?t=2386740

10-29-2012, 01:48 PM	#6
Faster_Gun Scooby Specialist Member#: 180217 Join Date: May 2008 Chapter/Region: MWSOC Location: Bingham Farms, MI Vehicle: 2004 WRX WGN 348whp 1980 Diesel Rabbit 35whp	The link above doesn't really help. It leaves me with a vent to atmo crank case. Bump, I actually have time to do this now.

11-02-2012, 03:37 PM	#7
super_usdm Scooby Newbie Member#: 286211 Join Date: Jun 2011 Chapter/Region: BAIC Location: Sacramento, CA Vehicle: 2003 WRX 1993 Legacy SS	Make a new hole in your inlet and run two cans is the best way to do it. One can for PCV and one for breathers. Connecting the two systems is not correct. It'll be better to run only one system to the can and leave the other alone if two cans isn't an option. The issue I had trouble understanding was why connecting the systems is bad. Excessive blow by in the crankcase can potentially cause air to be forced back into the breather vents- which should be under vaccum. Not only that but you are lowering the vaccum on each system if you t into the line because they both go into one nipple on the inlet which is creating the vaccum.