Welcome to the North American Subaru Impreza Owners Club Saturday August 30, 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 > Pre-2002 Factory Turbo 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 07-18-2007, 12:30 PM   #1
drift king
Scooby Newbie
 
Member#: 26493
Join Date: Oct 2002
Chapter/Region: SWIC
Location: Las Vegas NV
Vehicle:
99 Impreza RSTI
Silver

Default whats better v5 sti 2.0 motor or 04 sti 2.5 sti motor?

i have to make a decision but i dont know what to go with .... the car will be used for daily driving and autocross. may be you guys can give me some pros and cons about both.
* Registered users of the site do not see these ads.
drift king is offline   Reply With Quote
Old 07-18-2007, 12:36 PM   #2
Soon2Bgreat
Scooby Specialist
 
Member#: 2258
Join Date: Sep 2000
Chapter/Region: Tri-State
Location: Irvington, New York, USA
Vehicle:
1999 gc8 ver7 6mt
GT35R 504.7whp;)

Default

2.5l...this coming from a big fan of the 2.0's.

It's ALOT newer, more information on it, more powerful, etc.

I really don't see a reason to get an older V5 sti motor if you can afford doing an '04 STi 2.5l.

Hope this helps
Soon2Bgreat is offline   Reply With Quote
Old 07-18-2007, 02:04 PM   #3
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 would only go with the v5 STi if it was a matter of money. ECS is selling a v5 swap right now and it's dirt cheap, as in maybe a third of the price of an Ej257 swap...
Matt Monson is offline   Reply With Quote
Old 07-18-2007, 02:29 PM   #4
linsavy
Scooby Specialist
 
Member#: 11620
Join Date: Oct 2001
Location: Ontario
Vehicle:
1997 GF4-STiV3 clone

Default

Less money now, but more money later. Go with the 257.
The 257 has more torque for autox. Both would put you into a mod class.
I wouldn't buy a JDM 2.0l unless it was really really clean.
linsavy is offline   Reply With Quote
Old 07-18-2007, 06:52 PM   #5
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

For what ECS is asking for that swap, I would buy it, and immediately rebuild it with an Ej257 bottom end. Even without AVCS, those Ej207 heads outflow our USDM heads by quite a bit and can support way more power overall...
Matt Monson is offline   Reply With Quote
Old 07-19-2007, 09:11 PM   #6
drift king
Scooby Newbie
 
Member#: 26493
Join Date: Oct 2002
Chapter/Region: SWIC
Location: Las Vegas NV
Vehicle:
99 Impreza RSTI
Silver

Default

i have a 2.5l long block. should i just buy a 2.0 heads
drift king is offline   Reply With Quote
Old 07-20-2007, 11:02 AM   #7
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

You have an Ej257 block? As in, STi turbo block? Or are you talknig about the Ej251 block that is in your car?
Matt Monson is offline   Reply With Quote
Old 07-20-2007, 11:03 AM   #8
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

ps. Your heads are as good as the JDM heads were are discussing. It's starting to seem like you just need to get an STi bottom end for your turbo kit and complete your build as an RS-T and not do a swap...
Matt Monson is offline   Reply With Quote
Old 07-23-2007, 09:57 PM   #9
drift king
Scooby Newbie
 
Member#: 26493
Join Date: Oct 2002
Chapter/Region: SWIC
Location: Las Vegas NV
Vehicle:
99 Impreza RSTI
Silver

Default

i have a 04 sti longblock. i dont wanna do a nother rs-t build.
drift king is offline   Reply With Quote
Old 07-24-2007, 12:38 PM   #10
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

Even if you use DOHC it will still be an RS-T unless you do the wiring conversion to run the WRX/STi ECU. But call it what you want and do what you want with it. It is your car...

I will just close by saying that I know of a couple of 400whp cars running the SOHC EJ25 heads. Hitting 400whp on EJ205 heads is hard work without spending the money for cams and/or port work. It won't be cheap to get there and won't be any more reliable than it was with the SOHC heads. All you will really have is ricer's bragging rights to say that you have some of them dohicky heads in your car. But like I said, suit yourself...
Matt Monson is offline   Reply With Quote
Old 07-24-2007, 02:12 PM   #11
mxpunk
Scooby Specialist
 
Member#: 132130
Join Date: Nov 2006
Chapter/Region: TXIC
Location: Austin, Texas
Vehicle:
2002 Ford F-150
Graphite Gray

Default

Quote:
Originally Posted by Matt Monson View Post
Even if you use DOHC it will still be an RS-T unless you do the wiring conversion to run the WRX/STi ECU. But call it what you want and do what you want with it. It is your car...

I will just close by saying that I know of a couple of 400whp cars running the SOHC EJ25 heads. Hitting 400whp on EJ205 heads is hard work without spending the money for cams and/or port work. It won't be cheap to get there and won't be any more reliable than it was with the SOHC heads. All you will really have is ricer's bragging rights to say that you have some of them dohicky heads in your car. But like I said, suit yourself...

lmaoo
mxpunk is offline   Reply With Quote
Old 07-24-2007, 05:02 PM   #12
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 can't claim that as original. It belongs to one of the authors of the old "Suck Squish Bang Blow" series of articles from SCC that has recently been published as a book by Motorbooks Inc...
Matt Monson is offline   Reply With Quote
Old 07-24-2007, 07:28 PM   #13
mxpunk
Scooby Specialist
 
Member#: 132130
Join Date: Nov 2006
Chapter/Region: TXIC
Location: Austin, Texas
Vehicle:
2002 Ford F-150
Graphite Gray

Default

haha..so matt...am i a ricer if i build up a ej22e block using t-leg pistons and swap the sensors from my 1.8 intake manifold to a 98 rs manifold and use those dohc heads for a turbo engine build up?

i swear my impreza looks bone stock except for wrx wheels! it even has oem wrx exhaust on it!
mxpunk is offline   Reply With Quote
Old 07-25-2007, 02:25 PM   #14
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

Quote:
Originally Posted by mxpunk View Post
haha..so matt...am i a ricer if i build up a ej22e block using t-leg pistons and swap the sensors from my 1.8 intake manifold to a 98 rs manifold and use those dohc heads for a turbo engine build up?

i swear my impreza looks bone stock except for wrx wheels! it even has oem wrx exhaust on it!
No because those DOHC heads are a major leap forward for your engine and it's performance. The OP just seems like he wants to change because he thinks the other heads are better when they really aren't and there will be a lot of brain ache to making them work properly. But hey, it's his car and one of the beauties of this sort of thing is that we can personalize however suits our interests and don't need to care what anyone else thinks. Just because I call it rice doesn't really mean a thing...
Matt Monson is offline   Reply With Quote
Old 07-25-2007, 03:32 PM   #15
mxpunk
Scooby Specialist
 
Member#: 132130
Join Date: Nov 2006
Chapter/Region: TXIC
Location: Austin, Texas
Vehicle:
2002 Ford F-150
Graphite Gray

Default

dude i look up to you! it does mean a thing if its called rice..haha.
mxpunk is offline   Reply With Quote
Old 08-02-2007, 02:22 PM   #16
Arctic Assassian
Scooby Specialist
 
Member#: 91875
Join Date: Jul 2005
Chapter/Region: AKIC
Location: A-town!
Vehicle:
91 legacy TD04
04 WRB/carbon fibre STI

Default

hey, I think you got some **** on your nose...
Arctic Assassian is offline   Reply With Quote
Old 08-02-2007, 05:17 PM   #17
drift king
Scooby Newbie
 
Member#: 26493
Join Date: Oct 2002
Chapter/Region: SWIC
Location: Las Vegas NV
Vehicle:
99 Impreza RSTI
Silver

Default

ha, thanks for the info.......
drift king is offline   Reply With Quote
Old 08-03-2007, 01:37 PM   #18
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

You are welcome. And check back with updates of what you do. Even if it's not the build I would do, I love a good build. Just because some people put me on a pedastal doesn't mean I actually look down my nose at you. I am genuinely interested...
Matt Monson is offline   Reply With Quote
Old 08-07-2007, 05:45 PM   #19
Arctic Assassian
Scooby Specialist
 
Member#: 91875
Join Date: Jul 2005
Chapter/Region: AKIC
Location: A-town!
Vehicle:
91 legacy TD04
04 WRB/carbon fibre STI

Default

Arctic Assassian is offline   Reply With Quote
Old 08-07-2007, 07:19 PM   #20
hail2theTheif
Scooby Specialist
 
Member#: 42548
Join Date: Aug 2003
Chapter/Region: BAIC
Location: Redwood City, CA
Vehicle:
2015 Base STi
Black (CBS)

Default

that link was by far the biggest waste of time.....
hail2theTheif 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
Do JDM 2.0 heads bolt right up to US Sti 2.5 block? IA Performance Factory 2.0L Turbo Powertrain 3 01-06-2012 12:01 AM
04 WRX 2.0 - TurboXS Stage II Mods - Just blew the motor - Cheap magillaTheGorilla Private Vehicle 'For Sale' Classifieds 0 06-24-2009 02:12 PM
02+ WRX motor or 04+ WRX STi Motor 555subaru Private 'Wanted' Classifieds 0 02-20-2007 09:33 PM
will 2.0 water pump, belts fit 2.5 block?? Suberman Factory 2.0L Turbo Powertrain 6 11-01-2006 12:58 AM
2.0 stock headers same as 2.5? myrx Newbies & FAQs 3 06-30-2006 01:19 PM


All times are GMT -4. The time now is 06:29 PM.


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.