Welcome to the North American Subaru Impreza Owners Club Wednesday July 23, 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 08-07-2004, 02:00 AM   #1
SUBEFREAK
Scooby Newbie
 
Member#: 67637
Join Date: Aug 2004
Location: Southern, MD
Vehicle:
2004 Impreza R.S
java black pearl

Default Building my NA 2.5rs motor to a STI version

I believe the block is the same as the STI motor. Couldnt I just throw STi internals and heads, Turbo and the other STI components and everything would work? I know I would also have to change the ECU and all. Basicaly what do I have to do to get it to have the STI performance?
* Registered users of the site do not see these ads.
SUBEFREAK is offline   Reply With Quote
Old 08-07-2004, 02:25 AM   #2
elijah25rs
Scooby Specialist
 
Member#: 59711
Join Date: Apr 2004
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
2005 WRX
Crystal Grey Metallic

Default

Tranny? Diffs? Axles? etc.

There is more to it, I'm sure someone less noobish as myself can help you but it isn't 'easy'.
elijah25rs is offline   Reply With Quote
Old 08-07-2004, 03:02 AM   #3
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

Quote:
Originally Posted by SUBEFREAK
I believe the block is the same as the STI motor. Couldnt I just throw STi internals and heads, Turbo and the other STI components and everything would work? I know I would also have to change the ECU and all. Basicaly what do I have to do to get it to have the STI performance?
read n00b, your block is no where NEAR an STi block


i mean seriously, where do people come up with this stuff
HndaTch627 is offline   Reply With Quote
Old 08-07-2004, 03:10 AM   #4
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 SUBEFREAK
I know I would also have to change the ECU and all. Basicaly what do I have to do to get it to have the STI performance?
Everything from the STI minus the chasis. That should cover it.
Kostamojen is offline   Reply With Quote
Old 08-07-2004, 03:10 AM   #5
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

Quote:
Originally Posted by Kostamojen
Everything from the STI minus the chasis. That should cover it.
HndaTch627 is offline   Reply With Quote
Old 08-07-2004, 09:37 AM   #6
kevin2.5rs
Scooby Specialist
 
Member#: 67518
Join Date: Aug 2004
Chapter/Region: NESIC
Location: Bean town
Vehicle:
2013 Focus ST
TB

Default

just do a engine swap.
It's better if you want your engine to last.
kevin2.5rs is offline   Reply With Quote
Old 08-07-2004, 10:31 AM   #7
JonofScio
Scooby Newbie
 
Member#: 53595
Join Date: Jan 2004
Chapter/Region: NWIC
Location: nowehres
Vehicle:
1987 GL Hatch
EA81 1.6L + Weber

Default

yeah... your block is like, open deck and missing alot of turbo parts... whereas the STi block is semi-closed deck and has all those turbo parts.

You're block wouldn't handle a crapload of power without major modification.
JonofScio is offline   Reply With Quote
Old 08-07-2004, 03:03 PM   #8
RS_to_WRX_swap
Scooby Specialist
 
Member#: 40337
Join Date: Jul 2003
Chapter/Region: BAIC
Location: Bay Area
Vehicle:
95 L Coupe Swapped
99 Outback

Default

You guys are all wrong, all 2.5L motors are the same....
RS_to_WRX_swap is offline   Reply With Quote
Old 08-07-2004, 03:27 PM   #9
Charge
Scooby Specialist
 
Member#: 3313
Join Date: Dec 2000
Chapter/Region: MWSOC
Location: Cincinnati
Default

ooh...ooohhh...send him over to AFI so Kastle can blow his top!
Charge is offline   Reply With Quote
Old 08-07-2004, 03:52 PM   #10
Boxologist
Scooby Guru
 
Member#: 21118
Join Date: Jul 2002
Chapter/Region: Tri-State
Location: LI, NY
Default

he is looking for indiglo gauges for his '04 RS too.

kid, ur off to great start here...
Boxologist is offline   Reply With Quote
Old 08-07-2004, 04:21 PM   #11
SUBEFREAK
Scooby Newbie
 
Member#: 67637
Join Date: Aug 2004
Location: Southern, MD
Vehicle:
2004 Impreza R.S
java black pearl

Default

Was doing some research and found a website called http://www.xcceleration.com/imp-index.html and they sell sorts of parts just mainly for the subaru impreza. They had fully built racing motors but the cost like 20 grand or more. These motors are preety much like 650 horsepower and more. They also sell performance heads, blocks, internals and more.
SUBEFREAK is offline   Reply With Quote
Old 08-07-2004, 04:51 PM   #12
ethereal
Scooby Specialist
 
Member#: 19329
Join Date: May 2002
Location: Baghdad, Iraq
Vehicle:
1992 VW Golf

Default

Quote:
Originally Posted by SUBEFREAK
I was doing some research and found a website called http://www.xcceleration.com/imp-index.html and they sell all sorts of parts mainly for the Subaru Impreza. They have fully built racing motors but they cost like $20,000+. These motors are 650 horsepower and more. They also sell performance heads, blocks, internals and more.
So you go from asking a question to telling us a website that sells fully buillt motors? Go read the FAQ.

-Andy
ethereal is offline   Reply With Quote
Old 08-07-2004, 05:51 PM   #13
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

Quote:
Originally Posted by SUBEFREAK
Was doing some research and found a website called http://www.xcceleration.com/imp-index.html and they sell sorts of parts just mainly for the subaru impreza. They had fully built racing motors but the cost like 20 grand or more. These motors are preety much like 650 horsepower and more. They also sell performance heads, blocks, internals and more.
and if you believe that i would like to sell you some land in Florida, comes really cheap
HndaTch627 is offline   Reply With Quote
Old 08-07-2004, 05:55 PM   #14
Tarmac02
Scooby Turd
 
Member#: 45196
Join Date: Oct 2003
Location: idiOT, Viva la Barn
Vehicle:
'06 RREvoIXRS

Default

Quote:
Originally Posted by Boxologist
he is looking for indiglo gauges for his '04 RS too.

kid, ur off to great start here...

dammit... why do there people buy the car...

I saw a GC with chromie tail lights last night... he prolly wants those too

n00b here also posted asking if there were subie owners in Southern MD... in the General forum
Tarmac02 is offline   Reply With Quote
Old 08-07-2004, 07:53 PM   #15
tooocool49723
Scooby Specialist
 
Member#: 67127
Join Date: Jul 2004
Chapter/Region: MWSOC
Location: Belleville, MI
Vehicle:
3.3 I <3/h8 my GF3
1.8-2.5-2.2-2.5-2.2-3.3

Default

Quote:
Originally Posted by HndaTch627
and if you believe that i would like to sell you some land in Florida, comes really cheap
If you've been to florida, you know why that's funny.

Anyway, Why do people buy Altezza's?? their so stupid, just go to SOA and get some STI tails, much cleaner.

I wish Toyota never invented the altezza. Started a trend that just doesn't know when to die. And now their putting it on most of lexus's cars...
tooocool49723 is offline   Reply With Quote
Old 08-07-2004, 10:12 PM   #16
SUBEFREAK
Scooby Newbie
 
Member#: 67637
Join Date: Aug 2004
Location: Southern, MD
Vehicle:
2004 Impreza R.S
java black pearl

Default

Altezzas are peices of **** meant for hondas and acuras
SUBEFREAK is offline   Reply With Quote
Old 08-08-2004, 12:47 AM   #17
HndaTch627
Scooby Guru
 
Member#: 6551
Join Date: May 2001
Chapter/Region: MWSOC
Location: Carol Stream, IL
Vehicle:
'01 GC8 Dinged STM
'09 Concours 14 ABS Black

Default

Quote:
Originally Posted by SUBEFREAK
Altezzas are peices of **** meant for hondas and acuras
i'll remember that next time you ask for advice



4 yr Honda Certified Tech
ASE Certified Automotive Tech


and the cars i work on riced out a lot less then the Subaru's lately
HndaTch627 is offline   Reply With Quote
Old 08-08-2004, 01:52 PM   #18
YaZahX
Scooby Specialist
 
Member#: 11932
Join Date: Nov 2001
Chapter/Region: Tri-State
Location: NY
Vehicle:
1998 CW ITR
2006 NBP SI

Default

i dont see why everyone has to be a dick to the guy. unless u wanna help and explain things dont insult him.

the sti and 2.5l blocks are totally difefrent, the internals are stronger on the sti, it has 8.2:1 pistons and semi closed deck.

the rs block has smallrods, 10:1 pistons and open deck. the looks of allej series parts do look aike but there are differences when u look into them.

oh and hondas dont need those lights, all they do is need a turbo running 8 psi and they are set
YaZahX is offline   Reply With Quote
Old 08-08-2004, 02:44 PM   #19
SUBEFREAK
Scooby Newbie
 
Member#: 67637
Join Date: Aug 2004
Location: Southern, MD
Vehicle:
2004 Impreza R.S
java black pearl

Default

Thanks, I think I will probally do a swap when my warranty runs out. Kinda hard doing when your active in the millitary though. Yea all those honda and acuras need are those turbos. I got my ass handed to me when a civic beat me on the quarter mile when he ran a 11.3. That car looked so damn stock.
SUBEFREAK is offline   Reply With Quote
Old 08-09-2004, 11:42 AM   #20
subi_2.5rs
Scooby Newbie
 
Member#: 67538
Join Date: Aug 2004
Location: ghettofornia
Vehicle:
2003 impreza wrx
black/blue/purple

Default damn.....

swap civic it is....prelude h22 si....i dont know hondas......
subi_2.5rs is offline   Reply With Quote
Old 08-09-2004, 11:49 AM   #21
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

Guys quit being dicks. Don't worry man, all you need is the following to make this work.
-Semi close your block
-new pistons
-new rods
-new crank
-new cams
-new heads
-new springs/retainers
-add an upipe
-add a turbo
-add a downpipe
-new airbox
-add an intercooler
-add an inlet pipe
-new engine management

I think that's it, i might be missing a few things, but you get the point. Let us know how it turns out
Soon2Bgreat is offline   Reply With Quote
Old 08-09-2004, 12:30 PM   #22
iamrazor
Scooby Guru
 
Member#: 52324
Join Date: Jan 2004
Chapter/Region: NESIC
Location: Pelham, NH
Vehicle:
2011 WRX LTD (FS)
1990 T30 miata

Default

um, i think the only things that are the same is the displacement....
iamrazor is offline   Reply With Quote
Old 08-09-2004, 03:24 PM   #23
Kostamojen
Scooby Guru
 
Member#: 2272
Join Date: Sep 2000
Chapter/Region: BAIC
Location: haha XD
Vehicle:
2013 Subaru 599 :P
Galaxy Blue Sexy

Default

Well the design of the shortblock is technically very simular, minus the semi-closed segment on the STI shortblock and one or two other small things...
Kostamojen is offline   Reply With Quote
Old 08-09-2004, 03:31 PM   #24
Honkey3k
Scooby Specialist
 
Member#: 53992
Join Date: Jan 2004
Chapter/Region: BAIC
Location: Chico, Ca
Vehicle:
SOLD CGM 2005 2.5RS
35 PSI -- in my tires

Default

the STI and normal EJ25 block are built differently.
Honkey3k is offline   Reply With Quote
Old 08-09-2004, 04:08 PM   #25
SUBEFREAK
Scooby Newbie
 
Member#: 67637
Join Date: Aug 2004
Location: Southern, MD
Vehicle:
2004 Impreza R.S
java black pearl

Default

What does semi closed actually mean?
SUBEFREAK 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
N/A 2.5rs motor build, pistons question brian3676 Built Motor Discussion 7 04-14-2008 02:06 AM
Need a complete wrx motor for my 2000 2.5rs..? Subey03 Private 'Wanted' Classifieds 1 11-02-2007 06:18 AM
this might be dumb: but would an STi intake manifold fit on an NA 2.5RS? Impreza2003 Normally Aspirated Powertrain 15 06-22-2005 11:58 AM
I need to know if the STI RA gears would fit in my 2000 2.5RS casing billyr2.5 Transmission (AT/MT) & Driveline 1 02-25-2004 10:02 PM
my 01 2.5rs where to start? GRATEFUL ED Newbies & FAQs 2 05-30-2001 05:29 PM


All times are GMT -4. The time now is 12:49 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.