Welcome to the North American Subaru Impreza Owners Club Saturday September 20, 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 08-31-2005, 02:42 PM   #1
n2xlr8n
Scooby Specialist
 
Member#: 18960
Join Date: May 2002
Chapter/Region: South East
Location: Bama
Vehicle:
02 WRX MBP
It lives! ; )

Default SOHC DBW Intake manifold..can you guess?

I have this manifold in my possession. I have no idea what Subaru it is from, other than it is JDM, and drive-by-wire.

Can someone identify this piece or offer details?

Thanks for your time!

S.

The intake in question looks like this one:

http://www.glamisdunes.com/invision/...opic=48338&hl=
n2xlr8n is offline   Reply With Quote
Old 08-31-2005, 02:44 PM   #2
HamFist
Scooby Specialist
 
Member#: 2112
Join Date: Aug 2000
Chapter/Region: MWSOC
Vehicle:
2000 Impreza 2.5RS
BRP

Default

It's the 05 SOHC N/A intake. I drooled over fitting that thing to my 00 RS. Nothing swaps easily unfortunately. The fuel injectors, rails, TB, and evel the coil pack are different.
HamFist is offline   Reply With Quote
Old 08-31-2005, 02:57 PM   #3
n2xlr8n
Scooby Specialist
 
Member#: 18960
Join Date: May 2002
Chapter/Region: South East
Location: Bama
Vehicle:
02 WRX MBP
It lives! ; )

Default

Quote:
Originally Posted by HamFist
It's the 05 SOHC N/A intake. I drooled over fitting that thing to my 00 RS. Nothing swaps easily unfortunately. The fuel injectors, rails, TB, and evel the coil pack are different.
You are my new friend.

Is it USDM, as well? Even better.

I'll be using it on my EJ257 build up, providing it flows like I've heard...I'll be testing it next week.

Thank you very much.

S.
n2xlr8n is offline   Reply With Quote
Old 08-31-2005, 11:11 PM   #4
Patrick Olsen
NASIOC Supporter
 
Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
Vehicle:
1997 Legacy 2.5GT
QuickSilver Metallic

Default

Quote:
Originally Posted by n2xlr8n
I'll be using it on my EJ257 build up, providing it flows like I've heard...I'll be testing it next week.
If you get some flow bench numbers please come back and share them with the rest of us. Not that I have anything to compare them to really, but it would be good to see. I haven't actively pursued it, but I plan to get a '97-99 DOHC intake manifold flow tested, then get perhaps get it ExtrudeHoned and flow test it again.

Pat Olsen
'97 Legacy 2.5GT sedan
Patrick Olsen is offline   Reply With Quote
Old 09-01-2005, 12:34 AM   #5
n2xlr8n
Scooby Specialist
 
Member#: 18960
Join Date: May 2002
Chapter/Region: South East
Location: Bama
Vehicle:
02 WRX MBP
It lives! ; )

Default

Quote:
Originally Posted by Patrick Olsen
If you get some flow bench numbers please come back and share them with the rest of us. Not that I have anything to compare them to really, but it would be good to see. I haven't actively pursued it, but I plan to get a '97-99 DOHC intake manifold flow tested, then get perhaps get it ExtrudeHoned and flow test it again.

Pat Olsen
'97 Legacy 2.5GT sedan
I will surely share the data with you guys.

FWIW, save your money. Extrude honing did nothing for the imbalance inherent in my 02 WRX intake manifold...just made it flow more air.

I agree: If you can find one of these intakes, buy it...as a matter of fact buy me another one, too.

Thanks for the input folks.

S.
n2xlr8n is offline   Reply With Quote
Old 08-31-2005, 09:40 PM   #6
HamFist
Scooby Specialist
 
Member#: 2112
Join Date: Aug 2000
Chapter/Region: MWSOC
Vehicle:
2000 Impreza 2.5RS
BRP

Default

If you figure out how to get it to swap onto an RS, lemme know. I've heard the same thing about how it flows . Notice how the runners are flipped around on one side? As the motor breathes, it creates a perfect swirl pattern in the intake manifold. That's a very good thing.
HamFist is offline   Reply With Quote
Old 08-31-2005, 10:10 PM   #7
Kostamojen
Scooby Guru
 
Member#: 2272
Join Date: Sep 2000
Chapter/Region: BAIC
Location: haha XD
Vehicle:
2013 Subaru 599 :P
Galaxy Blue Sexy

Default

Quote:
Originally Posted by n2xlr8n
I have this manifold in my possession. I have no idea what Subaru it is from, other than it is JDM, and drive-by-wire.

Can someone identify this piece or offer details?

Thanks for your time!

S.

The intake in question looks like this one:

http://www.glamisdunes.com/invision/...opic=48338&hl=
That manifold was first used on JDM N/A EJ20's and EJ25's. Its now on the 05/06 USDM N/A motors as mentioned.
Kostamojen is offline   Reply With Quote
Old 08-31-2005, 11:02 PM   #8
redwagon
Scooby Specialist
 
Member#: 2181
Join Date: Aug 2000
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2008 SpecB
DGM

Default

You guys might want to snap these up while you can. The '06 JDM version looks to have TGVs in it...
Linky
redwagon is offline   Reply With Quote
Old 09-01-2005, 12:38 AM   #9
n2xlr8n
Scooby Specialist
 
Member#: 18960
Join Date: May 2002
Chapter/Region: South East
Location: Bama
Vehicle:
02 WRX MBP
It lives! ; )

Default

Quote:
Originally Posted by redwagon
You guys might want to snap these up while you can. The '06 JDM version looks to have TGVs in it...
Linky

That's my girl.

You guys have amazing resources.

From what I've seen, there are two models of this intake: The one in my posession has no TGV-looking obstructions, and the "other" looks identical, but it has TGV-less housings (three piece intake).

S.
n2xlr8n is offline   Reply With Quote
Old 09-01-2005, 05:19 PM   #10
n2xlr8n
Scooby Specialist
 
Member#: 18960
Join Date: May 2002
Chapter/Region: South East
Location: Bama
Vehicle:
02 WRX MBP
It lives! ; )

Default

Update:

I'm not betraying confidences (who & where), because there are few Subaru racers that will share info; Even so, I feel like it's important to give back to the community.

The quote was "The single best flowing manifold out there for a Subaru"

I'm not bothering to flow this manifold. I'm putting it straight on my engine. For those that know me, that should give you an idea.

HTH

S.
n2xlr8n is offline   Reply With Quote
Old 09-01-2005, 09:26 PM   #11
redwagon
Scooby Specialist
 
Member#: 2181
Join Date: Aug 2000
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2008 SpecB
DGM

Default

Quote:
Originally Posted by n2xlr8n
I'm putting it straight on my engine.
Please be sure and report back as to how the install went. It's really hard to see from photos if a normal TB will bolt straight up, if there are enough vacuum ports, if the fuel rails will bolt on, will it interfere with a GC hood, yadda yadda yadda.
Thanks.

<-- also interested in this upgrade.
redwagon is offline   Reply With Quote
Old 09-01-2005, 10:59 PM   #12
n2xlr8n
Scooby Specialist
 
Member#: 18960
Join Date: May 2002
Chapter/Region: South East
Location: Bama
Vehicle:
02 WRX MBP
It lives! ; )

Default

Quote:
Originally Posted by redwagon
Please be sure and report back as to how the install went. It's really hard to see from photos if a normal TB will bolt straight up, if there are enough vacuum ports, if the fuel rails will bolt on, will it interfere with a GC hood, yadda yadda yadda.
Thanks.

<-- also interested in this upgrade.
I apologize if I've mislead you guys; my project is a 2002 WRX with a EJ257 engine.

-A WRX/STi TB will not bolt right up; an adapter plate must be fabbed, or use smaller bolts and relocate the IAS slot.

-I'm using a vacuum pump. See
http://forums.nasioc.com/forums/show...hlight=Goodbye

-I'm using a custom fuel system with 1000 cc/min injectors, so I'm no help there either.

-It's going to be close on the hood clearance, but I think it will work, because I have a FMIC, and I'm using the CF reverse cowl.

If you guys are still interested, I'll report back the bottom end is finished (waiting on bearings from Folger).

Thanks for the help, folks!

S.
n2xlr8n is offline   Reply With Quote
Old 09-01-2005, 06:35 PM   #13
FalconRS
Scooby Specialist
 
Member#: 92913
Join Date: Aug 2005
Chapter/Region: W. Canada
Location: Winnipeg, MB
Vehicle:
2005 2.5RS Wagon
Crystal Grey Metallic

Default

Would this be the intake manifold that came on my 05 RS stock?
FalconRS is offline   Reply With Quote
Old 09-01-2005, 11:00 PM   #14
n2xlr8n
Scooby Specialist
 
Member#: 18960
Join Date: May 2002
Chapter/Region: South East
Location: Bama
Vehicle:
02 WRX MBP
It lives! ; )

Default

Quote:
Originally Posted by FalconRS
Would this be the intake manifold that came on my 05 RS stock?

Can't say for sure without a pic, but I doubt it.

S.
n2xlr8n is offline   Reply With Quote
Old 09-01-2005, 11:44 PM   #15
02Toyowrx
Scooby Newbie
 
Member#: 56520
Join Date: Mar 2004
Vehicle:
2002 WRX
White

Default

Which model has the TGV's, I need a shorter manifold
02Toyowrx is offline   Reply With Quote
Old 09-02-2005, 04:05 AM   #16
redwagon
Scooby Specialist
 
Member#: 2181
Join Date: Aug 2000
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2008 SpecB
DGM

Default

Bloody turbo guys grappin' on our tireds.... :fume:

So you're saying that the holy grail, the 'best flowing Subie manifold evAr' is a dohc item? Too bad. I wonder how different the '05 RS one is. It sure looks similar in terms of the runner diameter...

The only n/a intake manifolds I've seen with TGVs are the Japanese versions that haven't made it to the US. That PZEV Legacy had them, so does the current Outback 2.5i mill.
redwagon is offline   Reply With Quote
Old 09-02-2005, 05:30 AM   #17
Patrick Olsen
NASIOC Supporter
 
Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
Vehicle:
1997 Legacy 2.5GT
QuickSilver Metallic

Default

I can't tell from the pics in the dune buggy... How is the bolt pattern oriented where the manifold bolts to the heads? Is it like one of the ones in my awesome attached drawing?


Pat
Patrick Olsen is offline   Reply With Quote
Old 09-02-2005, 08:17 AM   #18
n2xlr8n
Scooby Specialist
 
Member#: 18960
Join Date: May 2002
Chapter/Region: South East
Location: Bama
Vehicle:
02 WRX MBP
It lives! ; )

Default

Quote:
Originally Posted by Patrick Olsen
I can't tell from the pics in the dune buggy... How is the bolt pattern oriented where the manifold bolts to the heads? Is it like one of the ones in my awesome attached drawing?


Pat
I didn't notice..it's left the building at present.

Are you saying that late model SOHC bolt pattern is offset?

Oh well, more work.

S.
n2xlr8n is offline   Reply With Quote
Old 09-02-2005, 11:41 AM   #19
Crawford Performance
Former Vendor
 
Member#: 42075
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Oceanside
Default

The SOHC, WRX and US STI all have the offset center bolts.

If you want to do a comparison, the cheapest way is to buy manifold gaskets for the manifolds in question and lay them on top of each other.

www.crawfordperformance.com
Crawford Performance is offline   Reply With Quote
Old 09-02-2005, 08:14 AM   #20
n2xlr8n
Scooby Specialist
 
Member#: 18960
Join Date: May 2002
Chapter/Region: South East
Location: Bama
Vehicle:
02 WRX MBP
It lives! ; )

Default

Quote:
Originally Posted by redwagon
Bloody turbo guys grappin' on our tireds.... :fume:

So you're saying that the holy grail, the 'best flowing Subie manifold evAr' is a dohc item? Too bad. I wonder how different the '05 RS one is. It sure looks similar in terms of the runner diameter...

The only n/a intake manifolds I've seen with TGVs are the Japanese versions that haven't made it to the US. That PZEV Legacy had them, so does the current Outback 2.5i mill.


No. It is a SOHC N/A item.
n2xlr8n is offline   Reply With Quote
Old 09-02-2005, 06:55 AM   #21
redwagon
Scooby Specialist
 
Member#: 2181
Join Date: Aug 2000
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2008 SpecB
DGM

Default

^^^ You can see quite clearly in the second photo that the outside bolts are offset toward the block. That's a SOHC manifold and I'd bet it's the '05 RS item.

But Pat, would a new WRX or USDM STi manifold not fit your dohc heads?
redwagon is offline   Reply With Quote
Old 09-02-2005, 01:35 PM   #22
Matt Monson
Scooby Guru
 
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

I did what Quirt is talking about at one point.

The short version is all Ej20G and Ej20k and Ej25 engines throught 1998 had the inline bolt pattern.

From '99 on, the Ej205, Ej207, and EJ25's, both SOHC and DOHC, all share the same offest bolt pattern...
Matt Monson is offline   Reply With Quote
Old 09-03-2005, 12:23 AM   #23
redwagon
Scooby Specialist
 
Member#: 2181
Join Date: Aug 2000
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2008 SpecB
DGM

Default

^^^^ Ohhhhh, that explains everything. :notworthy: :thumbsup:
redwagon is offline   Reply With Quote
Old 09-03-2005, 02:43 AM   #24
HamFist
Scooby Specialist
 
Member#: 2112
Join Date: Aug 2000
Chapter/Region: MWSOC
Vehicle:
2000 Impreza 2.5RS
BRP

Default

I looked pretty hard at swapping this onto my 00 RS. But damn, what a pain! New fuel rails, injectors, TB adapter plate, relocate the coil and wires....ungh! No. I'd love to, but I'll wait for someone else to try that one. I'm lucky the E85 trick worked as good as it did.
HamFist is offline   Reply With Quote
Old 09-03-2005, 03:58 AM   #25
zzyzx
Scooby Specialist
 
Member#: 815
Join Date: Jan 2000
Location: Florida
Vehicle:
2013 Boss 302 White
2000 2.5 RS Coupe Silver

Default

This is the stock manifold off of an '05 RS.

It's for SOHC and it won't bolt to a DOHC head.

The intake runners are large, and it'll be to be match to the heads.

The TB bolt pattern is different from a manual TB.

The fuel rail is different that previous RSs.

It uses WRX style injectors... so you can use WRX injectors.
zzyzx 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
WTB: TGV's (side or top), DBW Throttle Body, DBW Intake Manifold mattminer NESIC Private Classifieds 4 03-13-2010 05:43 PM
F/S Wrinkle red STI DBW intake manifold ronzogonzo Engine/Power/Exhaust 0 09-19-2008 01:00 PM
WTB 2.5STI DBW Intake Manifold sleepersy Private 'Wanted' Classifieds 0 09-09-2008 12:59 PM
PE 800cc STi injectors, STI dbw intake manifold LiquidForce Engine/Power/Exhaust 11 08-26-2008 01:59 PM
SoCal: STi DBW Intake Manifold synernut Engine/Power/Exhaust 29 12-04-2007 09:55 AM


All times are GMT -4. The time now is 04:55 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.