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Old 11-20-2012, 01:16 PM   #26
WRXLTD
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Originally Posted by HinshawWRX View Post

Simple fact is, one can be MADE for cheaper then bought, and the money can be used for better needs.
I agree the GS and Crawford AOSs are overpriced...

...but an oil soaked intercooler is less efficient than a dry one.
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Old 11-20-2012, 01:59 PM   #27
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It was a nice gain in power. Not a lot on top end but huge gains in the midrange. The car is smooth and very fun to drive now. Every car and dyno is a bit different but I ended up with 315whp/342wtq @ 20.5psi on 93 octane. I can PM you the graph if you want to check it out.
That's what I'm looking for! Sweet! Ill probably be more around the 290'S since ill be on 91 octane
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Old 11-20-2012, 02:02 PM   #28
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The GS EBCS is my favorite mod so far.. the thing works magic. Definitely worth the $100 or whatever it is.
I'm definitely lookin forward to it. I always here good things about it
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Old 11-20-2012, 05:55 PM   #29
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An AOS is going to keep the intake track clean (no oily gunk in the piping and intercooler) and it will prevent vaporized oil that enters the intake track from being combusted which can lead to detonation and carbon buildup in the combustion chamber.

I modded a Provent 200 to work on my car. https://www.mann-hummel.com/fileadmi...ProVent_en.pdf

Works great so far. Piping and intercooler are pristine and the unit sends accumulated oil back to crankcase for little to no maintenance except for cleaning the filter every 25kmiles.

Seems pretty commonplace for people to focus on power mods at the expense of reliability and piece of mind sometimes. Power is great and all but the $180bucks I spent on the provent sytem is a drop in the bucket compared to the 1000's I've spent increasing performance (and wear and tear). Next mod will be a Killer B oil pickup and I got quoted $60 for a heat dispersant coating for my PW TMIC so I might give that a shot based on testing I've seen.

Last edited by Cascader; 11-20-2012 at 06:11 PM.
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Old 11-21-2012, 04:45 PM   #30
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Originally Posted by Cascader View Post
An AOS is going to keep the intake track clean (no oily gunk in the piping and intercooler) and it will prevent vaporized oil that enters the intake track from being combusted which can lead to detonation and carbon buildup in the combustion chamber.

I modded a Provent 200 to work on my car. https://www.mann-hummel.com/fileadmi...ProVent_en.pdf

Works great so far. Piping and intercooler are pristine and the unit sends accumulated oil back to crankcase for little to no maintenance except for cleaning the filter every 25kmiles.

Seems pretty commonplace for people to focus on power mods at the expense of reliability and piece of mind sometimes. Power is great and all but the $180bucks I spent on the provent sytem is a drop in the bucket compared to the 1000's I've spent increasing performance (and wear and tear). Next mod will be a Killer B oil pickup and I got quoted $60 for a heat dispersant coating for my PW TMIC so I might give that a shot based on testing I've seen.
Thanks for your input this was very helpful I will be buying an aos when I get the chance. Christmas is coming up lol
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Old 11-21-2012, 04:50 PM   #31
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Quote:
Originally Posted by Cascader View Post
An AOS is going to keep the intake track clean (no oily gunk in the piping and intercooler) and it will prevent vaporized oil that enters the intake track from being combusted which can lead to detonation and carbon buildup in the combustion chamber.

I modded a Provent 200 to work on my car. https://www.mann-hummel.com/fileadmi...ProVent_en.pdf

Works great so far. Piping and intercooler are pristine and the unit sends accumulated oil back to crankcase for little to no maintenance except for cleaning the filter every 25kmiles.

Seems pretty commonplace for people to focus on power mods at the expense of reliability and piece of mind sometimes. Power is great and all but the $180bucks I spent on the provent sytem is a drop in the bucket compared to the 1000's I've spent increasing performance (and wear and tear). Next mod will be a Killer B oil pickup and I got quoted $60 for a heat dispersant coating for my PW TMIC so I might give that a shot based on testing I've seen.
Thanks or your input this really gave me a better understanding I will be buying an aos now
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Old 11-21-2012, 06:15 PM   #32
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Originally Posted by HinshawWRX View Post
Proof is the MILLIONS of cars that have blow by (hint all of them in the past 40+ years) that not once needed an AOS or catch can. Blow by still happens. Blow by is not a horrible thing. Where is the evidence showing an AOS/Catch can has extended the life of a motor? I trust car engineers, if it was needed there would be one.
Blowby on a stock car and blowby on a built motor running high boost are two totally different animals. There are many stock factory cars that come with AOS's. Just because they decided not to install one on your car doens't mean its not needed. To say excessive blowby and and want you to key on excessive is not a horrible thing shows a lack of understanding.
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Old 11-21-2012, 06:45 PM   #33
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So a Stage 2 WRX is a "built motor running high boost?"

Where did I say excessive blow by is standard? A bit of oil in an intercooler is NOT excessive. If you think it is, then you clearly have the lack of understanding.

What cars have air/oil separators stock?
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Old 11-21-2012, 06:58 PM   #34
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Quote:
Originally Posted by HinshawWRX View Post
Proof is the MILLIONS of cars that have blow by (hint all of them in the past 40+ years) that not once needed an AOS or catch can. Blow by still happens. Blow by is not a horrible thing. Where is the evidence showing an AOS/Catch can has extended the life of a motor? I trust car engineers, if it was needed there would be one.
My E36 BMW had one from the factory. i is mounted under the intake manifold.

There you go.
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Old 11-21-2012, 06:59 PM   #35
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Originally Posted by HinshawWRX View Post
So a Stage 2 WRX is a "built motor running high boost?"

Where did I say excessive blow by is standard? A bit of oil in an intercooler is NOT excessive. If you think it is, then you clearly have the lack of understanding.

What cars have air/oil separators stock?
e36 bmw and e46 bmw's that im aware of. Im sure the newer BMW's have them but I never got into them.
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Old 11-21-2012, 07:03 PM   #36
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in this link its part 01

http://www.realoem.com/bmw/showparts...64&hg=11&fg=15

being proved wrong on the internet sucks, bro. happened to me more then once.

Last edited by meat_WRX; 11-21-2012 at 07:08 PM.
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Old 11-21-2012, 07:19 PM   #37
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Note I never denied that cars can come with AOS from the factory, I asked which to be informed. Not getting proved "wrong bro."

Knowledge is power remember.

Also remember a BMW is not a Subaru. (and vice versa) And there is not evidence showing that an AOS has saved a motor. If we have this evidence, and more then just the few vendors that sell them, then we can evaluate. To me an AOS is the same category as that of front strut tower. Everyone talks them up, but nobody wants to talk about how they don't do anything for OUR cars.
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Old 11-21-2012, 07:23 PM   #38
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What cars have air/oil separators stock?

ok heres where you asked
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Old 11-21-2012, 07:26 PM   #39
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Quote:
Originally Posted by HinshawWRX View Post
Proof is the MILLIONS of cars that have blow by (hint all of them in the past 40+ years) that not once needed an AOS or catch can. Blow by still happens. Blow by is not a horrible thing. Where is the evidence showing an AOS/Catch can has extended the life of a motor? I trust car engineers, if it was needed there would be one.
is this is where the "proved wrong, Bro" statement came into play.

because BMW decided that a AOS from the factory was needed.
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Old 11-21-2012, 07:36 PM   #40
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Touche, go BMW.
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Old 11-21-2012, 08:04 PM   #41
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Most Porches have them too....honestly any high compression or forced induction motor should have one ideally as it will reduce the chances of detonation. Whether or not the cost of implementing one was worth it or not was a choice of the Subaru engineers.
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Old 11-21-2012, 08:44 PM   #42
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Damn Germans.
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Old 11-21-2012, 08:45 PM   #43
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id suggest running the grimmspeed aos only venting the heads. one head to each side then the exit port to the intake. then running a catch can for the Crank case.

That way you are not pulling pressure out of the whole long block via 1 port. But still using 2 ports as intended by the factory.

I personally Run 2 catch cans.
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Old 11-23-2012, 01:47 AM   #44
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Wonder how contaminated the oil is once its separated. In other words does one actually want to dump that back into the engine? Now I'm torn between an AOS and a Catch Can. Wish somebody would get the oil from the can analyzed and share the results.
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Old 11-23-2012, 09:12 AM   #45
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Originally Posted by 0BlueSTi4 View Post
Wonder how contaminated the oil is once its separated. In other words does one actually want to dump that back into the engine? Now I'm torn between an AOS and a Catch Can. Wish somebody would get the oil from the can analyzed and share the results.
its not "adding" anything that wasn't already there. Just follow the recommended oil changes and thats more important than anything else. Most of what is vaporised is the oil additives.

I run the gs because my car will be 300whp or less, rarely tracked and Im more interested about keeping the new tmic clean and avoiding possibly reduced octane than oil consumption, which isnt a aos problem, its mechanical (clearances or seals, or worse not changing your oil at the required frequency.)

Finally im too lazy to keep a catch can clean, and id be responsible enough to dispose of the gunk in a eco friendly way so itd be a pita.
The gs adds a touch of bling and is well built, but to each their own.

P
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Old 11-23-2012, 02:04 PM   #46
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Quote:
Originally Posted by Philbertio

its not "adding" anything that wasn't already there. Just follow the recommended oil changes and thats more important than anything else. Most of what is vaporised is the oil additives.

I run the gs because my car will be 300whp or less, rarely tracked and Im more interested about keeping the new tmic clean and avoiding possibly reduced octane than oil consumption, which isnt a aos problem, its mechanical (clearances or seals, or worse not changing your oil at the required frequency.)

Finally im too lazy to keep a catch can clean, and id be responsible enough to dispose of the gunk in a eco friendly way so itd be a pita.
The gs adds a touch of bling and is well built, but to each their own.

P
Yes, everything you just mentioned makes GS AOS sound very appealing to me as well and would be the preferred way to go. I don't track my car unfortunately so I don't think I should have any issues some people are reporting with GS.

One benefit I see with a catch can is you can actually see how much oil is getting blown by.

I am not sure exactly what is found in the blow by but I would imagine besides oil there could be some unburned fuel in there among other things.
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Old 11-23-2012, 02:29 PM   #47
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^^^^^

So like he said, nothing that wasn't already in there. You can't stop blowby or blowby products getting into the crankcase and as a result the oil. I like a AOS that retains some form of PCV to suck the blowby gassed out so they don't build up in the crankcase.
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