Recent Topics
Modding your car
by ram_man
34 minutes 29 seconds ago
High fuel consumption
by Lolvoguy
41 minutes 59 seconds ago
Fixing a cracked wheel?
by RamFan
50 minutes 33 seconds ago
2011 Fusion PU 0W-20 with Liqui-Moly MOS2 11.6k
by SubieRubyRoo
51 minutes 20 seconds ago
What oil do you run in your "Built" motors?
by BrocLuno
52 minutes 16 seconds ago
Steering seems stiff
by Toaster_Jer
Today at 10:23 PM
Best way to repair plastic gas tank on snow blower
by ram_man
Today at 09:18 PM
Engine compartment AC problems
by Gebo
Today at 09:11 PM
Post divorce Bosch?
by DuckRyder
Today at 08:43 PM
2000 miles of M1 HM 5W20 - oil is quite brown
by ford46guy
Today at 08:18 PM
Syntec 0w40 in 96 civic
by ryanschillinger
Today at 08:14 PM
Curious if They Are Changing The Motorcraft Filter
by crazyoildude
Today at 08:11 PM
Newest Members
bubu, Pheelingphine, Btown, ILLM, flysaab
56177 Registered Users
Who's Online
60 registered (69GTX, barkingspider, AZjeff, 2015_PSD, Bklynrx7, bubbatime, 4 invisible), 834 Guests and 148 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
56177 Members
66 Forums
241292 Topics
3909494 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG
Topic Options
#906139 - 05/22/07 08:24 PM Air/Oil Separator for Subaru STi?
sekretskwirl04 Offline

Registered: 05/18/07
Posts: 19
Loc: Tahoe, CA
My first post in this forum. Great place and love the tech'. Anyway track season is here and we are looking for a viable A/I Separator for our 04 STi. Crawford makes one...a real nice one that is Subaru specific and well engineered BUT it costs 360$ Uh huh. Waaay TOO MUCH for a simple device IMO. I found a Moroso at Summit for 95$ and a Jegs for 45$. They all look like the same thing> hoses in/hoses out. I'm not sure if these will work with a forced induction motor though.We want to recirculate the oil back into the block for sure and not vent it. Ideas? thanks Danielle

#906140 - 05/24/07 03:28 AM Re: Air/Oil Separator for Subaru STi? [Re: sekretskwirl04]
outersquare Offline

Registered: 06/02/03
Posts: 202
Loc: sokali
if you mean an oil catch can, you can rig one up for $20;

btw, don't use clear lines like those pics, use fuel/egr lines and yellow teflon tape.

#906141 - 05/24/07 04:09 PM Re: Air/Oil Separator for Subaru STi? [Re: outersquare]
ccs v2.0 Offline

Registered: 08/07/06
Posts: 567
Loc: IL
The thing to watch is that the reservoir may not be compatible with synthetic oils and, after a while, as the oils starts 'eating up' the plastic, you'll see the walls becoming cloudy. IIRC, there will be a sticker on most filters with a statement to that fact.
The light at the end of the tunnel is the Recession Freight Express Train coming at us. - Al, 11/07/07

#906142 - 05/25/07 05:57 AM Re: Air/Oil Separator for Subaru STi? [Re: ccs v2.0]
SamSnyder Offline

Registered: 12/24/06
Posts: 17
Loc: San Fernando Valley
They're selling a few on ebay too. Take a look over there.

#906143 - 05/26/07 06:58 PM Re: Air/Oil Separator for Subaru STi? [Re: SamSnyder]
AndyH Offline

Registered: 11/07/04
Posts: 2493
Loc: MSP 'burbs, MN
A very slick setup offered for sale over on by a forum member:
'13 VW Golf R: Castrol Syntec 0W-30
'13 VW GTI: OEM Factory Fill
'05 Audi S4 Avant: Mobil 1 0W-40

#906144 - 05/28/07 10:29 AM Re: Air/Oil Separator for Subaru STi? [Re: AndyH]
gtx510 Offline

Registered: 04/26/04
Posts: 1463
Loc: CA
Do you think oil would eat the foam in that second separator?

Try googling for "air oil separator". They're common on airplanes and diesel trucks. I've even seen a few sites that show you how to make one. Here's a how-to for a Sube.

An oil catch can isn't an air/oil separator. And you'll get better ring seal if you have the intake drawing air out of the can (after the oil has been removed).

#906145 - 05/30/07 04:07 AM Re: Air/Oil Separator for Subaru STi? [Re: gtx510]
racer12306 Offline

Registered: 10/06/05
Posts: 1884
Loc: Baltimore, MD
i have one of the ones made from an air compressor system filter. so far it has been good with a year and a half of service on it, with synthetic oil. thats about 30000 miles for me.

i believe you want to make sure you have a check valve as to not send boost up into the valve cover.
04 Dodge Neon SXT/2.0/MTX/M1 0w40/Fram Ultra/5000 miles for now

12 Chrysler T&C/3.6/6A/5w30PU/PureONE/OLM