Welcome to the North American Subaru Impreza Owners Club Monday July 28, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
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.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 09-09-2010, 09:39 PM   #1
00LGTP
Scooby Newbie
 
Member#: 172618
Join Date: Feb 2008
Chapter/Region: Tri-State
Vehicle:
2000 RS
BRP

Default 05+ manifold project

i am currently in the process of putting a 07 2.5i IM on my 2.5rs.

im pretty sure i have everything i need planned out, just need to get parts and physically do it.

i have found very little info about people doing this, which is why i wanted to see what info you guys have obtained.

any info will be helpful, im open to all suggestions.
* Registered users of the site do not see these ads.
00LGTP is offline   Reply With Quote
Old 09-11-2010, 01:35 AM   #2
williaty
Scooby Guru
 
Member#: 71092
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Delaware County, Ohio
Vehicle:
2005 2.5RS Wagon
Regal Blue Pearl

Default

The only difficulty is in mounting the throttle since you have a cable throttle and the 05+ IM is for DBW. There's some brackets and things you'll have to have custom fabbed at a machine shop to allow the cable throttle to function.
williaty is offline   Reply With Quote
Old 09-12-2010, 10:33 PM   #3
wmdoucette
Scooby Newbie
 
Member#: 192709
Join Date: Oct 2008
Chapter/Region: W. Canada
Location: Calgary, AB CANADA
Vehicle:
2007 2.5iSE Wagon CG
2001 2.5RS Coupe RBP

Default

and fab some sort of port for the Idle air to flow through. My best idea right now is to hog out the hole in the TB, tap an AN Pipe-flare fitting in and do the same somewhere on the intake manifold.
wmdoucette is offline   Reply With Quote
Old 09-12-2010, 10:34 PM   #4
williaty
Scooby Guru
 
Member#: 71092
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Delaware County, Ohio
Vehicle:
2005 2.5RS Wagon
Regal Blue Pearl

Default

Isn't the entire idle-air apparatus integrated into the throttle body?
williaty is offline   Reply With Quote
Old 09-14-2010, 11:40 PM   #5
00LGTP
Scooby Newbie
 
Member#: 172618
Join Date: Feb 2008
Chapter/Region: Tri-State
Vehicle:
2000 RS
BRP

Default

i compared gaskets and came to the conclusion that my stock RS TB will bolt up, but that stupid IACV passage has to be in the way.

i have a TB spacer, so i block it off on the manifold side, drill a hole/install fitting, run a hose from that fitting to the IM plenum.

done!

cable will be easy, small bracket.

the map sensor!

im going to port out on of the EGR holes, only need about a 1/8" all the way around, polish it up nice and pray i did a good job and that O ring will seal. i can always use sensor save gasket sealer.

bolting it up will be no harder of bolting on another plate to the stock EGR threads and drilling holes with bolts for the map.


you guys know it will work!

if you guys get a chance, let me know what you think about this for the fuel system.

http://www.rs25.com/forums/f13/t1427...-his-hose.html
00LGTP is offline   Reply With Quote
Old 09-15-2010, 11:39 AM   #6
renob123
Scooby Specialist
 
Member#: 41986
Join Date: Aug 2003
Chapter/Region: NWIC
Location: Hillsboro, OR
Vehicle:
'06 STI/'85 Brat

Default

Nice! Thanks for putting this out there for everyone.

Aside from zzyzxx running one in the 300hp NA car, does anyone have any info on the gains that can be achieved by swapping to the newer manifold?

Jacob
renob123 is offline   Reply With Quote
Old 09-15-2010, 05:31 PM   #7
00LGTP
Scooby Newbie
 
Member#: 172618
Join Date: Feb 2008
Chapter/Region: Tri-State
Vehicle:
2000 RS
BRP

Default

Quote:
Originally Posted by renob123 View Post
Nice! Thanks for putting this out there for everyone.

Aside from zzyzxx running one in the 300hp NA car, does anyone have any info on the gains that can be achieved by swapping to the newer manifold?

Jacob
i havent found anything, which is why i made this thread.

more brains on the job is a good thing.
00LGTP is offline   Reply With Quote
Old 09-15-2010, 05:33 PM   #8
renob123
Scooby Specialist
 
Member#: 41986
Join Date: Aug 2003
Chapter/Region: NWIC
Location: Hillsboro, OR
Vehicle:
'06 STI/'85 Brat

Default

Quote:
Originally Posted by 00LGTP View Post
i havent found anything, which is why i made this thread.

more brains on the job is a good thing.
Ahh, so you plan to post some of the gains or a flowbench or something? I'm very interested.

Jacob
renob123 is offline   Reply With Quote
Old 09-15-2010, 05:39 PM   #9
00LGTP
Scooby Newbie
 
Member#: 172618
Join Date: Feb 2008
Chapter/Region: Tri-State
Vehicle:
2000 RS
BRP

Default

ill post pics and explain how i did things but i cant be bothered by a flowbench.

dont get me wrong i would love too, but im a full time college student and (Automotive Technology and Management) i have limited time.
00LGTP is offline   Reply With Quote
Old 09-15-2010, 05:47 PM   #10
renob123
Scooby Specialist
 
Member#: 41986
Join Date: Aug 2003
Chapter/Region: NWIC
Location: Hillsboro, OR
Vehicle:
'06 STI/'85 Brat

Default

Quote:
Originally Posted by 00LGTP View Post
ill post pics and explain how i did things but i cant be bothered by a flowbench.

dont get me wrong i would love too, but im a full time college student and (Automotive Technology and Management) i have limited time.
That's cool. I was asking about gains, and you said that was why you made this thread. I'd call it more of a how-to, which is great, but I wanted to see the gains.

Jacob
renob123 is offline   Reply With Quote
Old 09-15-2010, 05:52 PM   #11
00LGTP
Scooby Newbie
 
Member#: 172618
Join Date: Feb 2008
Chapter/Region: Tri-State
Vehicle:
2000 RS
BRP

Default

Quote:
Originally Posted by renob123 View Post
That's cool. I was asking about gains, and you said that was why you made this thread. I'd call it more of a how-to, which is great, but I wanted to see the gains.

Jacob
lol yea guess " how to" is more like it.

butt dyno for now, real dyno when the chance pops up in the future.
00LGTP is offline   Reply With Quote
Old 09-15-2010, 05:55 PM   #12
renob123
Scooby Specialist
 
Member#: 41986
Join Date: Aug 2003
Chapter/Region: NWIC
Location: Hillsboro, OR
Vehicle:
'06 STI/'85 Brat

Default

Quote:
Originally Posted by 00LGTP View Post
lol yea guess " how to" is more like it.

butt dyno for now, real dyno when the chance pops up in the future.
Cool. Until then, does anyone else have any ideas of the actual gains from this swap? I've never heard of any. I've just heard zzyzxx saying they used it.

Jacob
renob123 is offline   Reply With Quote
Old 09-16-2010, 08:33 AM   #13
Storm
Scooby Guru
 
Member#: 5218
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
Vehicle:
96L Most Over-
Developed Beater

Default

Contact 42 Autosports. They've done it and came to the conclusion that the stock intake tract can't provide enough air to make it an all out winner. There are more details, but you should contact them to get the whole story.

Jay
Storm is offline   Reply With Quote
Old 09-17-2010, 01:49 PM   #14
00LGTP
Scooby Newbie
 
Member#: 172618
Join Date: Feb 2008
Chapter/Region: Tri-State
Vehicle:
2000 RS
BRP

Default

^^ send them an email, waiting for a reply.

does anyone know if stock 2.5i injectors will work with a WRX/STI aftermarket fuel rail?

gotta spend a certain amount on a FPR, so might as well do it while i have it apart and do a fuel rail/FPR combo. ebay sells come kits with lines and everything i need. normally i wouldnt mess with ebay stuff but machined aluminum is machined aluminum.
00LGTP is offline   Reply With Quote
Old 09-17-2010, 02:02 PM   #15
RaineMan
Scooby Specialist
 
Member#: 256727
Join Date: Sep 2010
Chapter/Region: RMIC
Location: SL,UT
Vehicle:
2007 2.5I Wagon
Silver

Default

Quote:
Originally Posted by Storm View Post
They've done it and came to the conclusion that the stock intake tract can't provide enough air to make it an all out winner.

Jay
So what you are saying is that the heads outflow the stock intake?
RaineMan is offline   Reply With Quote
Old 09-17-2010, 02:51 PM   #16
00LGTP
Scooby Newbie
 
Member#: 172618
Join Date: Feb 2008
Chapter/Region: Tri-State
Vehicle:
2000 RS
BRP

Default

Quote:
Originally Posted by RaineMan View Post
So what you are saying is that the heads outflow the stock intake?
i think he means the stock intake tubing cant flow enough to see gain.

its not all about the volume of air, the runner lengths are long and P&P from the factory.
00LGTP is offline   Reply With Quote
Old 09-17-2010, 02:57 PM   #17
RaineMan
Scooby Specialist
 
Member#: 256727
Join Date: Sep 2010
Chapter/Region: RMIC
Location: SL,UT
Vehicle:
2007 2.5I Wagon
Silver

Default

Quote:
Originally Posted by 00LGTP View Post
i think he means the stock intake tubing cant flow enough to see gain.

its not all about the volume of air, the runner lengths are long and P&P from the factory.
OK... I think I get you. The IM can handle more flow than the stock tubing and filter provide. Certainly an good case for intake modification if I've ever seen one.

What about the heads? Can they handle more air than the stock intake can provide as well? Generally that's where you hit a wall when it comes to NA engines... if the heads flow less CFM than the IM or intake tubes then modifying the intake won't do you any good anyways.
RaineMan is offline   Reply With Quote
Old 09-17-2010, 04:18 PM   #18
Storm
Scooby Guru
 
Member#: 5218
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
Vehicle:
96L Most Over-
Developed Beater

Default

Exactly.....the torquebox made for pre-05 cars has a small inlet and the CAI they developed for those cars ended up not being a good match for that manifold. The torquebox made for that unit was better, but still short of what they had prior to bolting it on. IIRC, the best gains came from a 4" cone filter (from a GTR) taped directly onto the TB.

The smaller volume of the 05 torquebox works well enough, but the inlet to it needs opened up substantially to let it work.

Jay
Storm is offline   Reply With Quote
Old 09-17-2010, 04:24 PM   #19
RaineMan
Scooby Specialist
 
Member#: 256727
Join Date: Sep 2010
Chapter/Region: RMIC
Location: SL,UT
Vehicle:
2007 2.5I Wagon
Silver

Default

So I take it the intake was redesigned for 06+? Just trying to figure out where my car fits in this.
RaineMan is offline   Reply With Quote
Old 09-17-2010, 04:48 PM   #20
00LGTP
Scooby Newbie
 
Member#: 172618
Join Date: Feb 2008
Chapter/Region: Tri-State
Vehicle:
2000 RS
BRP

Default

Quote:
Originally Posted by RaineMan View Post
So I take it the intake was redesigned for 06+? Just trying to figure out where my car fits in this.
you already have the manifold i am putting on.

here is the fuel rail/line kit i was talking about earlier.

http://cgi.ebay.com/ebaymotors/High-...mZ280562461348
00LGTP is offline   Reply With Quote
Old 09-17-2010, 04:56 PM   #21
williaty
Scooby Guru
 
Member#: 71092
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Delaware County, Ohio
Vehicle:
2005 2.5RS Wagon
Regal Blue Pearl

Default

Quote:
Originally Posted by RaineMan View Post
So I take it the intake was redesigned for 06+? Just trying to figure out where my car fits in this.
05 and 06 are pretty much the same. The big change is between 04 and 05.
williaty is offline   Reply With Quote
Old 09-17-2010, 05:37 PM   #22
RaineMan
Scooby Specialist
 
Member#: 256727
Join Date: Sep 2010
Chapter/Region: RMIC
Location: SL,UT
Vehicle:
2007 2.5I Wagon
Silver

Default

Quote:
Originally Posted by williaty View Post
05 and 06 are pretty much the same. The big change is between 04 and 05.
And 07 is identical to 06 then?
RaineMan is offline   Reply With Quote
Old 09-17-2010, 05:38 PM   #23
williaty
Scooby Guru
 
Member#: 71092
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Delaware County, Ohio
Vehicle:
2005 2.5RS Wagon
Regal Blue Pearl

Default

Yup45
williaty is offline   Reply With Quote
Old 09-17-2010, 05:40 PM   #24
RaineMan
Scooby Specialist
 
Member#: 256727
Join Date: Sep 2010
Chapter/Region: RMIC
Location: SL,UT
Vehicle:
2007 2.5I Wagon
Silver

Default

Ok... cool. Beginning to get an idea of what I've got under the hood now.

Thanks!
RaineMan is offline   Reply With Quote
Old 09-17-2010, 07:28 PM   #25
williaty
Scooby Guru
 
Member#: 71092
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Delaware County, Ohio
Vehicle:
2005 2.5RS Wagon
Regal Blue Pearl

Default

Summary:

2002-2004=not much change
2005=big changes compared to 04
2006-2007=tiny changes compared to 05
williaty 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
Wanted - 04/05 wrx project car bossautosports Private 'Wanted' Classifieds 0 01-27-2010 05:54 PM
05 sti project, soon on 18x9.5 rota grids stilv Member's Car Gallery 88 09-25-2009 04:04 PM
05 sti project car.. only 25k miles! michsti Private Vehicle 'For Sale' Classifieds 1 07-13-2009 03:06 PM
Reverse Intake Manifold Project dunk Mid Atlantic Impreza Club -- MAIC 78 01-01-2009 11:36 AM
SoCal: 02-05 manifold, TGV's, injectors, throttle body, engine harness, turbo inlet MannyMohawk#5 Engine/Power/Exhaust 26 01-29-2008 11:25 PM


All times are GMT -4. The time now is 07:02 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.