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Old 10-08-2019, 01:30 PM   #1
Serge415
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Default Comp Series or Street Series IAG AOS for 2014 wrx?

Hello peeps,

I ordered a comp series IAG AOS for my 2014 WRX hatchback, 2.5l turbo... was wondering if it's too much, or should I stick with street series? Anyone own either of the two products? What do you guys suggest? The goal is to avoid oil buildup in the intake and just looking for a clean solution...

I understand the comp series setup vents crankcase gases back to the atmosphere and will force me to do a retune, whereas the street series does not do that, recirculates, and is good for 600hp applications. Will comp series cause issues for me when it comes to smog checks later on?

Any feedback would be greatly appreciated... thanks!

---
Stage 1:
Cobb v3 - protuned at GST Motorsports
SF Cobb intake
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Last edited by Serge415; 10-08-2019 at 01:40 PM.
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Old 10-08-2019, 02:06 PM   #2
Waddlz
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This is an unpopular opinion, but there is 0 need for an AOS on these cars until you start to exceed the factory PCV system.

I run a rotated turbo and use the Street version, since IAG says to use that on cars less than 600 whp with E85, and I still see oil get in the intake tract.

IAG says this is normal, but then what is the point of an AOS if oil is still going to get in the intact tract? the factory PCV system is fine, and an AOS is overkill/useless on even a FBO car.
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Old 10-08-2019, 02:45 PM   #3
Stretch18
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Quote:
Originally Posted by Waddlz View Post
This is an unpopular opinion, but there is 0 need for an AOS on these cars until you start to exceed the factory PCV system.

I run a rotated turbo and use the Street version, since IAG says to use that on cars less than 600 whp with E85, and I still see oil get in the intake tract.

IAG says this is normal, but then what is the point of an AOS if oil is still going to get in the intact tract? the factory PCV system is fine, and an AOS is overkill/useless on even a FBO car.
I think everyone's experience varies on this. For myself, I was losing almost two quarts of oil between changes. Even the simpler Grimmspeed AOS cut that down to almost nothing.

I'm going to be upgrading to a Crawford v3 soon...
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Old 10-08-2019, 03:16 PM   #4
Serge415
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Originally Posted by Stretch18 View Post
I think everyone's experience varies on this. For myself, I was losing almost two quarts of oil between changes. Even the simpler Grimmspeed AOS cut that down to almost nothing.

I'm going to be upgrading to a Crawford v3 soon...
That's my concern... losing oil. I lost a lot of oil once and blew a rod bearing because of low oil pressure at 36k miles on a brand new car...

Can you speak to the smog in CA, cuz venting to atmosphere is frowned upon, rght?
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Old 10-08-2019, 04:22 PM   #5
Waddlz
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If you're losing that much oil, something else is wrong.

My super loose built STi only consumes about 1 quart in 3000 miles. and a lot of it is leaking out the oil pan cause I didn't seal it well.

My wifes 2011 WRX is about a quart every 3000 miles. I just check both cars on Sunday nights.

An AOS is a bandaid at that point.
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Old 10-09-2019, 02:26 PM   #6
stu
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If you get on it a lot you will lose oil, I don't understand why you would want to put that nasty contaminated oil back into the oil pan. Catch can and an extra qt is the way to go. I made my own catch can that can hold up to a qt and still flow enough air. people are so annoyed that they have to keep an eye on oil level.

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Old 10-09-2019, 02:36 PM   #7
Stretch18
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Originally Posted by stu View Post
I don't understand why you would want to put that nasty contaminated oil back into the oil pan.
There's no reason that the oil vapor is contaminated any more than it was when it was in the engine.

I know it looks like hell when it comes out of a catch can, but that's mostly just water condensation mixing with the oil. Drop it into a 200 degree oil pan and you're left with... oil.
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Old 10-09-2019, 02:48 PM   #8
WRXnick16
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Quote:
Originally Posted by Serge415 View Post
Can you speak to the smog in CA, cuz venting to atmosphere is frowned upon, rght?
Neither will pass smog. You're not allowed to modify the factory PCV system.
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Old 10-09-2019, 02:54 PM   #9
WRXnick16
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Quote:
Originally Posted by Waddlz View Post
This is an unpopular opinion, but there is 0 need for an AOS on these cars until you start to exceed the factory PCV system.

I run a rotated turbo and use the Street version, since IAG says to use that on cars less than 600 whp with E85, and I still see oil get in the intake tract.

IAG says this is normal, but then what is the point of an AOS if oil is still going to get in the intact tract? the factory PCV system is fine, and an AOS is overkill/useless on even a FBO car.
I agree with Waddlz on this.. especially being that you're near stock with only an intake. There are arguments to be had for running an AOS with E85 and/or if you track the car frequently.. but it's not worth the cost, maintenance, complexity/added failure points, and smog hassles with your setup as a daily driver. You would have to find someone to pass you for smog or remove it every 2 years.
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Old 10-09-2019, 05:01 PM   #10
domin8469
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Quote:
Originally Posted by WRXnick16 View Post
I agree with Waddlz on this.. especially being that you're near stock with only an intake. There are arguments to be had for running an AOS with E85 and/or if you track the car frequently.. but it's not worth the cost, maintenance, complexity/added failure points, and smog hassles with your setup as a daily driver. You would have to find someone to pass you for smog or remove it every 2 years.
That's only if they do a visual inspection. Here they plug in the OBD/2 and look at the read out poof done pass or fail. I don't un hook anything my tune takes care of the computer
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Old 10-09-2019, 05:19 PM   #11
WRXnick16
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Originally Posted by domin8469 View Post
That's only if they do a visual inspection. Here they plug in the OBD/2 and look at the read out poof done pass or fail. I don't un hook anything my tune takes care of the computer
It certainly sucks living in CA as a car enthusiast.
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Old 10-10-2019, 10:45 AM   #12
stu
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Quote:
Originally Posted by Stretch18 View Post
There's no reason that the oil vapor is contaminated any more than it was when it was in the engine.

I know it looks like hell when it comes out of a catch can, but that's mostly just water condensation mixing with the oil. Drop it into a 200 degree oil pan and you're left with... oil.
In theory sure, but in actuality its dripping that emulsification into your engine while your car is off and the oil is cool. this allows the water to set on top of the oil until the next start. Go ahead and keep using it, I just don't try to justify something that relies on oil over 212 degree to work properly.

I've installed several of these and they just don't separate like they say they do.
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Old 10-11-2019, 02:06 PM   #13
Serge415
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Originally Posted by WRXnick16 View Post
Neither will pass smog. You're not allowed to modify the factory PCV system.
That's what I wanted to clarify more so than anything else. Thanks!
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Old 10-11-2019, 02:12 PM   #14
Serge415
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It certainly sucks living in CA as a car enthusiast.
Yes it does.
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Old 10-11-2019, 02:15 PM   #15
Serge415
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Quote:
Originally Posted by Stretch18 View Post
I think everyone's experience varies on this. For myself, I was losing almost two quarts of oil between changes. Even the simpler Grimmspeed AOS cut that down to almost nothing.

I'm going to be upgrading to a Crawford v3 soon...
I wonder why you're still getting oil in the intake despite the claims it should eliminate that...
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