Need Help with Crawford AOS v2 on 2011 STI

JT7Dust · 01-22-2013, 05:35 PM

I've searched and searched the forum but I ran into some confusion when installing my V2 AOS on my 2011 STI. My question is with using the Crawford AOS in conjunction with an aftermarket turbo inlet. I'm using the perrin one. The inlet instructs you to disconnect the white check valve and cap it off and then run the small hose from the crankcase breather connection to the turbo inlet fitting. I've done that. Here is my problem. Now when installing the AOS, it says to connect the "Y" connector to the crankcase breather port and run two hoses from the crankcase port to the AOS (Picture is below of that). I get that part. What happens to the turbo inlet fitting hose that was once connected to the crankcase port connect to? Do I block it off now? Or do I run a T connector to run in conjunction with one of the two hoses connected to the AOS? Does that make sense? The pic below shows the fitting I'm speaking of. I noticed some of the earlier versions of these turbo inlets did not have this extra fitting in the back above the BOV return hose.

Inlet fitting

"Y" Connector hoses to AOS

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trev762 · 01-22-2013, 06:41 PM

Aos bottom big hose goes off the y connector and the smaller one I "think" goes to steel line that runs along the tmic from the y connector or to aos. The hose that comes off the very top of the aos goes to the turbo inlet pipe. Make sure the very bottom hose off the aos to the y connector is long enough cuz mine wasn't and had to go buy a longer hose to keep it away from the turbo hope this helps.

Edit: where u have the arrow pointing on the turbo inlet pipe, that is not where the top hose from the aos goes. It goes on the large fitting that is all by itself beside the bpv return fitting.

I would have go out and look at mine to give u a step by step but not today its -18c lol.

JT7Dust · 01-22-2013, 07:28 PM

I appreciate the help. I think I may have confused you. I've got the top hose running to the front/middle fitting on the turbo inlet. It's the far back fitting next to the turbo that I'm not sure what it will connect to. I've done a little photoshop to see if this helps.

trev762 · 01-22-2013, 07:57 PM

Quote:

Originally Posted by JT7Dust

I appreciate the help. I think I may have confused you. I've got the top hose running to the front/middle fitting on the turbo inlet. It's the far back fitting next to the turbo that I'm not sure what it will connect to. I've done a little photoshop to see if this helps.

Gotcha! That's the where the pcv was connected to correct me if I'm wrong. U can either leave that hose connected with the pcv capped off or just plug that fitting on the turbo inlet.

JT7Dust · 01-22-2013, 08:13 PM

I figured that it might need to be deleted. I just wasn't sure. Thanks for the help!

trev762 · 01-22-2013, 08:46 PM

Quote:

Originally Posted by JT7Dust

I figured that it might need to be deleted. I just wasn't sure. Thanks for the help!

No prob

How did the bottom hose fit to y connector, was it long enough to run along the fire wall to the pitch stop mount before routing over to the y connector???

JT7Dust · 01-22-2013, 09:54 PM

Yeah mine was long enough. I guess I was one of the fortunate ones. I know a lot of people where getting hoses that were too short.

01-22-2013, 05:35 PM	#1
JT7Dust Scooby Newbie Member#: 271142 Join Date: Jan 2011 Location: Fort Worth, TX Vehicle: 2011 STI Sedan SWP	Need Help with Crawford AOS v2 on 2011 STI I've searched and searched the forum but I ran into some confusion when installing my V2 AOS on my 2011 STI. My question is with using the Crawford AOS in conjunction with an aftermarket turbo inlet. I'm using the perrin one. The inlet instructs you to disconnect the white check valve and cap it off and then run the small hose from the crankcase breather connection to the turbo inlet fitting. I've done that. Here is my problem. Now when installing the AOS, it says to connect the "Y" connector to the crankcase breather port and run two hoses from the crankcase port to the AOS (Picture is below of that). I get that part. What happens to the turbo inlet fitting hose that was once connected to the crankcase port connect to? Do I block it off now? Or do I run a T connector to run in conjunction with one of the two hoses connected to the AOS? Does that make sense? The pic below shows the fitting I'm speaking of. I noticed some of the earlier versions of these turbo inlets did not have this extra fitting in the back above the BOV return hose. Inlet fitting "Y" Connector hoses to AOS * Registered users of the site do not see these ads.

01-22-2013, 06:41 PM	#2
trev762 Scooby Specialist Member#: 280572 Join Date: Apr 2011 Chapter/Region: E. Canada Location: southern ontario canada Vehicle: 2011 sti sedan plasma blue pearl	Aos bottom big hose goes off the y connector and the smaller one I "think" goes to steel line that runs along the tmic from the y connector or to aos. The hose that comes off the very top of the aos goes to the turbo inlet pipe. Make sure the very bottom hose off the aos to the y connector is long enough cuz mine wasn't and had to go buy a longer hose to keep it away from the turbo hope this helps. Edit: where u have the arrow pointing on the turbo inlet pipe, that is not where the top hose from the aos goes. It goes on the large fitting that is all by itself beside the bpv return fitting. I would have go out and look at mine to give u a step by step but not today its -18c lol. Last edited by trev762; 01-22-2013 at 07:00 PM.

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01-22-2013, 07:28 PM	#3
JT7Dust Scooby Newbie Member#: 271142 Join Date: Jan 2011 Location: Fort Worth, TX Vehicle: 2011 STI Sedan SWP	I appreciate the help. I think I may have confused you. I've got the top hose running to the front/middle fitting on the turbo inlet. It's the far back fitting next to the turbo that I'm not sure what it will connect to. I've done a little photoshop to see if this helps.

01-22-2013, 08:13 PM	#5
JT7Dust Scooby Newbie Member#: 271142 Join Date: Jan 2011 Location: Fort Worth, TX Vehicle: 2011 STI Sedan SWP	I figured that it might need to be deleted. I just wasn't sure. Thanks for the help!

01-22-2013, 09:54 PM	#7
JT7Dust Scooby Newbie Member#: 271142 Join Date: Jan 2011 Location: Fort Worth, TX Vehicle: 2011 STI Sedan SWP	Yeah mine was long enough. I guess I was one of the fortunate ones. I know a lot of people where getting hoses that were too short.