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Old 11-09-2003, 06:09 PM   #1
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Member#: 43491
Join Date: Sep 2003
Location: Michigan
1997 Impreza Outback

Default Breathers

Alright, i am bored and have time to kill, i dont wanna do suspension right now cuz of winter.. But.. I wanna build an intake. I am thinking of using breathers to limit how much SI tube i have to buy. I was thinking of popping breathers on the Valve covers, and all the other hoses.. anyone have info regarding this??
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Old 11-10-2003, 05:07 PM   #2
Scooby Newbie
Member#: 395
Join Date: Oct 1999
Location: Daly City, CA USA
2000 Impreza 2.5RS
Blue Ridge Pearl


Breathers are a no, no. Not only do you risk splashing oil all over the engine bay, you take away the vacuum it creates inside the crankcase.

Try to push your hand through a tube of water, now try with out the water, see how much easier it is? That's what a vacuum does in the engine.
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Old 11-10-2003, 10:32 PM   #3
Scooby Specialist
Member#: 9243
Join Date: Aug 2001
Chapter/Region: NESIC
Location: Suffield, CT
05 Nissan Titan
06 B9 (hers)


Hmm, a cross post in the same forum???

People are not answering you in your other post because what you are asking makes no sense. You gain nothing but a decrease and possibly engine damage by placing breathers on hoses for no reason. Breathers WILL NOT give you horsepower and have nothing to do with a CAI.

If you are looking to build a DIY CAI, do a search in this forum and you will find a ton of info.

As far as the breathers on everything, no one has a clue as to what you are talking about.
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Old 11-11-2003, 07:47 AM   #4
Scooby Newbie
Member#: 43038
Join Date: Sep 2003
Location: Franklin, Tennessee U.S.
2002 Forester S


I do know what your talking about and I would not recommend breathers. I had a breather filter for my old Weapon-R intake and it definately took some torque away from the bottom end. I would just recommend buying a quality intake like an Injen(what I've got)or a Cobb CAI. These kits do not use breathers and they have ports for the stock vacuum lines.
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