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Old 07-08-2009, 03:11 PM   #1
rack
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Member#: 32908
Join Date: Feb 2003
Chapter/Region: AKIC
Location: Alaska, Anchorage
Vehicle:
2005 Impreza WRX STI
BLUE

Default Oil Catch Can Installed

**This is not a how to, simply information about Oil Catch Cans (and apparently an A/O Seperator by mistake).

Links to information.

FAQ
Oil Catch Can FAQ

Installs
PDF File: Perrin Install Instructions
Crawford Install with FMIC.
Cusco Oil Catch Can Install
Another Opinion on Installation

Building your own
DIY: Build an OIL Catch Can
Accurate Machine Works: DIY Type of install
Another DIY: Build your own Catch Can

Personal Experience

Stuff about my Install
Got and installed one. Wow, there is NO room in the 05 STi to put anything extra....I ended up running the hoses down along, and over the air box, then straight to just after the T and at the Turbo Inlet Hose. They provided a bunch of foam, I didn't use it yet, Gonna see how it works without it.

Got a Red Perrin one to match all the other Red Perrin parts I have.

Ordered it from Hi-Speed Solutions.

I'll upload a picture or two tonight.


Information To think about BEFORE installing/Buying:

If your going to mount it on the passenger side strut tower, figure out where you are going to relocate that horn peice to.

Make sure you are at least 3'' away from the Turbo Heat Shield (per Perrin's instructions)

The Perrin one is litterally just a soup looking can, encased with sylicone hose, with 2 end caps. $140 might not be worth it (now that I've seen it in person). Possibly look into those $30-$50 Ebay ones with the Alan Wrench screws. Or the Greddy $89-$101 ones. However, mine is red....
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Last edited by rack; 07-10-2009 at 03:49 AM.
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Old 07-08-2009, 04:07 PM   #2
AKLGT
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Member#: 85199
Join Date: Apr 2005
Chapter/Region: AKIC
Location: Anchorage
Vehicle:
2012 turbo rollersk8
EvolvedAK's hood ornament

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wow. that was fast! and yes, it looks just like mine. but I painted mine black to match the rest of my interior.
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Old 07-08-2009, 11:40 PM   #3
Crawford Performance
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Location: Oceanside
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Last edited by Crawford Performance; 07-16-2009 at 11:38 AM.
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Old 07-09-2009, 02:48 AM   #4
Kiwi Fella
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Chapter/Region: NWIC
Location: Seattle
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2000 RSTi

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Something about a private video?
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Old 07-09-2009, 03:01 AM   #5
SubySal
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Join Date: Sep 2003
Chapter/Region: RMIC
Location: Colorado Springs
Vehicle:
2004 Impreza RS
PacificaBlue/BlackTarmacs

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A catchcan and an air/oil separator are really two very different things.

A catchcan simple collects oil from the PCV system. Actually I had one and the oil vapor just went though it and into the intake anyway. It's best to get a catchcan with a breather filter and dead end the PCV hose at the filter. You really do not need vacuum to evacuate the crankcase of oil vapor. It does fine vented to atmosphere via a catchcan.

An oil separator will take the oil vapor, cool it, turn it back into liquid, and then automatically drain it into the engine. A catchcan has to be physically emptied then oil has to be added back to the engine. The harder the car is driven the more frequently the catchcan will have to be emptied.

Here's a pic of a modified Crawford air/oil separator on my '04 RS...
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Old 07-09-2009, 03:37 PM   #6
rack
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Location: Alaska, Anchorage
Vehicle:
2005 Impreza WRX STI
BLUE

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I didn't investigate all the links fully, Was just providing information.

I installed an "oil catch can" from Perrin. If I don't end up with anything inside it, I'll put the "filter" pieces in. However they were not the shape I would have expected, so I didn't put them in.

I was helping a friend last night, so no pictures yet.

I'll try to upload them tonight after class.
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Old 07-09-2009, 03:39 PM   #7
rack
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Location: Alaska, Anchorage
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2005 Impreza WRX STI
BLUE

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Quote:
Originally Posted by Crawford Performance View Post
How about an install video -

He changed the link and now I cant find it! Sorry, I will fix it soon...
This thread isn't a how to, or a source, Was just providing information to some of the local AKIC members. If you see, most of the links go to other peoples FAQ, or Installs here on Nasioc. (again was just providing a source for information, so others could see what I was talking about)
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Old 07-09-2009, 05:16 PM   #8
b16h22
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2009 STI

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Quote:
Originally Posted by rack View Post
I installed an "oil catch can" from Perrin. If I don't end up with anything inside it, I'll put the "filter" pieces in. However they were not the shape I would have expected, so I didn't put them in.
Does the Perrin kit come with a filter? What do you mean they weren't the shape?

I'm waiting on my catch cans to come in and am thinking they may require some mods to better catch the oil vapor. Something like SubySal was saying about venting and ending the line at the can may be the best way to go.
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Old 07-09-2009, 05:46 PM   #9
rack
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Location: Alaska, Anchorage
Vehicle:
2005 Impreza WRX STI
BLUE

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Quote:
Originally Posted by b16h22 View Post
Does the Perrin kit come with a filter? What do you mean they weren't the shape?

I'm waiting on my catch cans to come in and am thinking they may require some mods to better catch the oil vapor. Something like SubySal was saying about venting and ending the line at the can may be the best way to go.
They were basically large circular skinny peices of foam...

When I upload pictures, I'll take some of the foam.
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Old 07-09-2009, 05:59 PM   #10
SubySal
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Location: Colorado Springs
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2004 Impreza RS
PacificaBlue/BlackTarmacs

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It's a good thread. I was just adding to the information pool too with my own experiences. That's all. I very fond of my A/O separator so I will share info unsolicited at every opportunity.
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Old 07-10-2009, 03:43 AM   #11
rack
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Member#: 32908
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Location: Alaska, Anchorage
Vehicle:
2005 Impreza WRX STI
BLUE

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Images put in first post
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Old 07-16-2009, 01:17 AM   #12
b16h22
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2009 STI

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So i just got my Perrin catch cans in and i'm concerned that the ports on these things are too small. The stock hose is 3/8" and the fittings for the catch cans are like 1/8". This seems like it would create back pressure. In the catch can FAQ and on DIY threads the recommended fittings say 3/8" which makes sense to match the stock hose lines. I guess I could modify the ports by re-tapping the threads and get larger fittings. Thoughts about the smaller ports?
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