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Old 07-23-2019, 02:48 PM   #2001
Scooby Newbie
Member#: 447104
Join Date: May 2016
Chapter/Region: South East
Location: Broward, FL
2011 Impreza 2.5i
Spark Silver Metallic


updated picture of my intake with 2 catch cans.
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Old 08-26-2019, 01:38 AM   #2002
*** Banned ***
Member#: 503876
Join Date: Jul 2019

Hello everyone,,
I have an 07' 2.5i 5M, and was thinking about a CAI or SRI, but wasn't sure it would do what I want. I'd like a bit more pull above about 4K. In the summer with the AC on there is surging at low speed, that would be nice to get rid of. This is my first FI car, and my other is an 86' Chevy, so I'm not up to speed on a lot of the new stuff, and learning what MAP, MAF, and all the other abbreviations are and mean. I usually get into things pretty deep, but have to get up to speed.
reversephonelookup.onl/ curated.onl/nba-reddit/
I find it interesting about resonance, and the like. I used to build audio, and horn loaded speakers, and some things with intake and exhaust have reminded me of similarities, so I know a bit about how things may work. I have worked for a co that made microcircut materials, and had a contract to develop materials to use in Fiat's emission controls in the 80's, but just know the basics of the controls.

Was wondering what the "Question Mark" looking tube on the intermediate tube between the torque box and the MAF housing was for? To me it looks like a chamber to divert or reduce pressure from backing up the intake when the throttle is closed. Don't understand what that might do, except maybe get faster response when getting off and on the throttle, unless the valves closing sends a wave back out the intake. Wonder what would happen if that intermediate tube was left in place, and just the torque box was removed?


Last edited by JhonMicky; 08-29-2019 at 04:04 PM.
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Old 06-26-2020, 04:27 PM   #2003
Scooby Newbie
Member#: 144605
Join Date: Mar 2007
Chapter/Region: BAIC
2007 2.5i Wagon
Satin White Pearl

Default Fb20d?

Has any body done any testing with the newer engines (FB20D)? Will they have the same issues?
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Old 06-26-2020, 04:33 PM   #2004
Soul Shinobi
Scooby Newbie
Member#: 130759
Join Date: Oct 2006
Chapter/Region: NESIC
Location: Nashua, NH, USA
2002 Forester S


I haven't heard any issues with cars after the 2000s, but I'm also curious if someone has tested.
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Old 06-26-2020, 06:03 PM   #2005
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Licking County, Ohio
2005 2.5RS Wagon
Regal Blue Pearl


Given that no one knew about the issue for years back in the day, I'm betting no one has tested it now. That's especially true because modern day Imprezas are NOT a car-guy car anymore so no one who cares to test properly owns one.
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