Welcome to the North American Subaru Impreza Owners Club Friday September 24, 2021
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Normally Aspirated Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 07-23-2019, 02:48 PM   #2001
OpFox
Scooby Newbie
 
Member#: 447104
Join Date: May 2016
Chapter/Region: South East
Location: Broward, FL
Vehicle:
2011 Impreza 2.5i
Spark Silver Metallic

Default

updated picture of my intake with 2 catch cans.
https://i.imgur.com/x4xLRe1.jpg
* Registered users of the site do not see these ads.
OpFox is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 08-26-2019, 01:38 AM   #2002
JhonMicky
*** Banned ***
 
Member#: 503876
Join Date: Jul 2019
Default

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?

JM

Last edited by JhonMicky; 08-29-2019 at 04:04 PM.
JhonMicky is offline   Reply With Quote
Old 06-26-2020, 04:27 PM   #2003
cdwahl
Scooby Newbie
 
Member#: 144605
Join Date: Mar 2007
Chapter/Region: BAIC
Vehicle:
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?
cdwahl is offline   Reply With Quote
Old 06-26-2020, 04:33 PM   #2004
Soul Shinobi
Scooby Newbie
 
Member#: 130759
Join Date: Oct 2006
Chapter/Region: NESIC
Location: Southern NH, USA
Vehicle:
2002 Forester S

Default

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

Default

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.
williaty is offline   Reply With Quote
Old 08-21-2020, 04:07 PM   #2006
cdwahl
Scooby Newbie
 
Member#: 144605
Join Date: Mar 2007
Chapter/Region: BAIC
Vehicle:
2007 2.5i Wagon
Satin White Pearl

Default

Okay thanks, I was curious who would respond here? I have learned a lot from both you over the years thank you!
cdwahl is offline   Reply With Quote
Old 11-06-2020, 02:43 AM   #2007
Snoe
Scooby Newbie
 
Member#: 520042
Join Date: Nov 2020
Question 98 impreza L 2.2

Hi im not sure if this is an active forum, but I've been having the bogging or lagging issue between 1-2k rpms no codes or check engine lights have been thrown but I know something isn't quite right, I have recently changed the plugs and wires, fuel filter, oil and oil filter, but I can't pinpoint the issue. Ive been reading and keep hearing MAF in a bunch of forums but can't see how it could be the issue if no codes are being thrown ... just to mention a lot of black sut is built up on my exhaust pipe. any info would be greatly appreciated!

-Snoe
Snoe is offline   Reply With Quote
Old 11-06-2020, 10:26 AM   #2008
williaty
Scooby Guru
 
Member#: 71092
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Licking County, Ohio
Vehicle:
2005 2.5RS Wagon
Regal Blue Pearl

Default

Quote:
Originally Posted by Snoe View Post
Hi im not sure if this is an active forum, but I've been having the bogging or lagging issue between 1-2k rpms no codes or check engine lights have been thrown but I know something isn't quite right, I have recently changed the plugs and wires, fuel filter, oil and oil filter, but I can't pinpoint the issue. Ive been reading and keep hearing MAF in a bunch of forums but can't see how it could be the issue if no codes are being thrown ... just to mention a lot of black sut is built up on my exhaust pipe. any info would be greatly appreciated!

-Snoe
Your question has nothing to do with the topic of this thread. Start your own thread.
williaty is offline   Reply With Quote
Old 02-15-2021, 04:54 PM   #2009
Enphenate
Scooby Newbie
 
Member#: 179301
Join Date: May 2008
Default

I just purchased a 2007 Impreza 2.5i, it looks like it came with an intake, but I couldnt find any information online about the brand or type.

According to the original post, would this be considered a hybrid intake and is it acceptable to keep in the 2.5i or would it be beneficial to remove it and replace it with the stock parts?

Enphenate is offline   Reply With Quote
Old 02-15-2021, 05:21 PM   #2010
williaty
Scooby Guru
 
Member#: 71092
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Licking County, Ohio
Vehicle:
2005 2.5RS Wagon
Regal Blue Pearl

Default

Quote:
Originally Posted by Enphenate View Post
I just purchased a 2007 Impreza 2.5i, it looks like it came with an intake, but I couldnt find any information online about the brand or type.

According to the original post, would this be considered a hybrid intake and is it acceptable to keep in the 2.5i or would it be beneficial to remove it and replace it with the stock parts?

That appears to be a hybrid. You need to check to make sure it's connected to the big plastic jug inside the fender to confirm it was done properly.
williaty is offline   Reply With Quote
Old 07-28-2021, 06:51 PM   #2011
RAV
Scooby Newbie
 
Member#: 502113
Join Date: May 2019
Default

Thank you
RAV is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
CAIs, SRIs, and dynos Bluefoton General Community 10 04-09-2008 08:27 PM
problems with 04' sti into an 01' RS help! Imbaru25rs Subaru Conversions 7 02-18-2006 02:40 AM
Any problems with your STI and with SOA? bbbwrx STi Forum Archive 3 08-27-2003 04:32 PM
LOTS of Problems with SOA, Dealer, and MYSUBARU.com saleen90181 Newbies & FAQs 11 11-26-2002 01:37 PM
Anyone with CAI, Unichip and stock turbo? Dougeefresh Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 4 04-27-2002 12:13 PM

All times are GMT -4. The time now is 09:06 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2021 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.