Welcome to the North American Subaru Impreza Owners Club Saturday July 12, 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 > Factory 2.0L 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 09-10-2004, 01:36 AM   #1
neversatisfied
Scooby Specialist
 
Member#: 42631
Join Date: Sep 2003
Chapter/Region: MWSOC
Location: Omaha, NE
Vehicle:
03 Subaru WRX
Silver T67 equipped

Default New 2.5l STi shortblock with 2.0l WRX heads?

Will the new 2.5l STi block work with 2.0l WRX heads? Anything I need to know to about accessories to make this work or is it a direct replacement? Any info would be great.
* Registered users of the site do not see these ads.
neversatisfied is offline   Reply With Quote
Old 09-10-2004, 02:05 AM   #2
dothespeedlimit
Scooby Specialist
 
Member#: 55980
Join Date: Feb 2004
Chapter/Region: MAIC
Location: day by day
Vehicle:
car. car!
car?

Default

yes it will work and yes the shortblock is a direct swap.
dothespeedlimit is offline   Reply With Quote
Old 09-10-2004, 08:22 AM   #3
Pacobeagle
Scooby Specialist
 
Member#: 8775
Join Date: Jul 2001
Chapter/Region: South East
Location: Mobile,AL
Vehicle:
2010 "Zed" 1000
Orange/White

Default

I've put together two of them in the past 6 months (Speedy Gp, 2point5literwrx) Speedy's has the USDM Sti cams in it too!!! You'll need the Sti head gaskets though. Don't forget to cap off the extra breather on the top of the block near the back of the block.

Jose
Pacobeagle is offline   Reply With Quote
Old 09-10-2004, 08:39 AM   #4
LiquidForce
Scooby Specialist
 
Member#: 12811
Join Date: Nov 2001
Chapter/Region: South East
Location: Roswell Ga
Vehicle:
2002 2.5l Wrx
517whp/516wtq (Stage pi)

Default

It is a direct swap like Pacobeagle1 said. The one thing that stumped me for a while was an extra vacuum line on the Tumble generator valve on the drivers side. It turns out that the line does not connect to anything (at least on an 02).
LiquidForce is offline   Reply With Quote
Old 09-10-2004, 10:51 AM   #5
Davenow
Scooby Guru
 
Member#: 23676
Join Date: Aug 2002
Chapter/Region: NESIC
Location: de_dust and Orgrimar
Vehicle:
.

Default

Quote:
Originally Posted by Pacobeagle1
I've put together two of them in the past 6 months (Speedy Gp, 2point5literwrx) Speedy's has the USDM Sti cams in it too!!! You'll need the Sti head gaskets though. Don't forget to cap off the extra breather on the top of the block near the back of the block.

Jose
and how does it run with stock WRX heads and cams?
WHats the change like?
Davenow is offline   Reply With Quote
Old 09-10-2004, 12:53 PM   #6
RALLYT-WRX
Scooby Specialist
 
Member#: 9369
Join Date: Aug 2001
Chapter/Region: MAIC
Location: Manchester, PA
Vehicle:
F#ck U & Your Stance
B.L.O.D.

Default

Yeah, what he said.

As I am also considering this swap.
RALLYT-WRX is offline   Reply With Quote
Old 09-10-2004, 12:58 PM   #7
Pacobeagle
Scooby Specialist
 
Member#: 8775
Join Date: Jul 2001
Chapter/Region: South East
Location: Mobile,AL
Vehicle:
2010 "Zed" 1000
Orange/White

Default

Well, 2point5literwrx's motor is still breaking in. I finished it right before hurricane Frances. Speedy Gp's motor, however, running the same thing but using the USDM sti cams made 305hp and 303tq on the dyno. His mods are APS dr650, vf22, sti pink injectors, 255lph pump, utec, Denso IK22, UP and Dp. These motors pull down low like stink. Feels very good. Also, turbo spool up on the VF22 is slightly better due to increased displacement.

Jose
Pacobeagle is offline   Reply With Quote
Old 09-10-2004, 01:01 PM   #8
doogie1
Scooby Newbie
 
Member#: 46149
Join Date: Oct 2003
Location: ohio
Vehicle:
2002 wrx STI HYBRID
wr blue

Default

I have the swap with the stock wrx heads(except i have shimless buckets ) everything bolts up and like someone mentioned you need the ej257 head gasket but everything else oil pump, etc you can use from the wrx. I couldn't ask for anything more, trust me you'll not be dissapointed but you definately need a bigger turbo than stock....i have a vf30 301hp and 317tq at 14.5psi.
doogie1 is offline   Reply With Quote
Old 09-10-2004, 01:22 PM   #9
RALLYT-WRX
Scooby Specialist
 
Member#: 9369
Join Date: Aug 2001
Chapter/Region: MAIC
Location: Manchester, PA
Vehicle:
F#ck U & Your Stance
B.L.O.D.

Default

Cool!

That's exactly what I wanted to hear, I guess now it's time to start saving my Pennies.
RALLYT-WRX is offline   Reply With Quote
Old 09-10-2004, 01:53 PM   #10
AspWhtRex
Scooby Specialist
 
Member#: 29393
Join Date: Nov 2002
Chapter/Region: MAIC
Location: York, PA
Vehicle:
2012 Outback
graphite grey metallic

Default

whoa awesome numbers off a vf30 with only 14.5 psi
AspWhtRex is online now   Reply With Quote
Old 09-10-2004, 02:01 PM   #11
Pacobeagle
Scooby Specialist
 
Member#: 8775
Join Date: Jul 2001
Chapter/Region: South East
Location: Mobile,AL
Vehicle:
2010 "Zed" 1000
Orange/White

Default

Doogie, What Intercooler Are You Using?

Jose
Pacobeagle is offline   Reply With Quote
Old 09-10-2004, 03:01 PM   #12
LiquidForce
Scooby Specialist
 
Member#: 12811
Join Date: Nov 2001
Chapter/Region: South East
Location: Roswell Ga
Vehicle:
2002 2.5l Wrx
517whp/516wtq (Stage pi)

Default

At a minimum you would want to use a vf22. I am running a vf34 and my top end really drops off.

You can see comparisons of other setups on this dyno here >
http://www.dyno4mance.com/news/SEDynoDay.php

LiquidForce is offline   Reply With Quote
Old 09-10-2004, 03:08 PM   #13
fogdor
Scooby Specialist
 
Member#: 45726
Join Date: Oct 2003
Vehicle:
2007 Mazdaspeed3
Cosmic Blue

Default

Do the USDM STi Cams show a marked improvement up top?
fogdor is offline   Reply With Quote
Old 09-10-2004, 03:18 PM   #14
totoherbs
Scooby Guru
 
Member#: 7321
Join Date: Jun 2001
Chapter/Region: NESIC
Location: waltham, ma
Vehicle:
.... 122 IggPoints
Work... ahhh... so tired.

Default

Quote:
Originally Posted by fogdor
Do the USDM STi Cams show a marked improvement up top?
No. Same duration as wrx cams with more lift.
totoherbs is offline   Reply With Quote
Old 09-10-2004, 04:48 PM   #15
doogie1
Scooby Newbie
 
Member#: 46149
Join Date: Oct 2003
Location: ohio
Vehicle:
2002 wrx STI HYBRID
wr blue

Default

Hey jose, im running a greddy fmic and a greddy type-s bov 100% venting
doogie1 is offline   Reply With Quote
Old 09-10-2004, 06:17 PM   #16
Pacobeagle
Scooby Specialist
 
Member#: 8775
Join Date: Jul 2001
Chapter/Region: South East
Location: Mobile,AL
Vehicle:
2010 "Zed" 1000
Orange/White

Default

Doogie,

Seriously, those are some impressive numbers considering that the VF30 is a smaller turbo than the VF22. Where does your power and better yet the torque peak at?


Jose
Pacobeagle is offline   Reply With Quote
Old 09-10-2004, 11:21 PM   #17
wrx_snobordr
Scooby Newbie
 
Member#: 49343
Join Date: Nov 2003
Location: philly area
Vehicle:
02 wrx
silver

Default

I am just trying to see if i am gettign this right. I can take an STI shortblock and put my wrx heads on it and it will run fine? The wrx wiring harness will work also? How about the ecu, wouldnt the engine run lean due to the extra displacement? I know it would be best if you upgraded the turbo and intercooler but what about a piggy back?

matt
wrx_snobordr is offline   Reply With Quote
Old 09-11-2004, 03:49 AM   #18
doogie1
Scooby Newbie
 
Member#: 46149
Join Date: Oct 2003
Location: ohio
Vehicle:
2002 wrx STI HYBRID
wr blue

Default

Hey jose, the turbo has full boost at 3000 rpm and this is due to the displacement and the boost doesn't taper off at all it holds it to redline i was also impressed by the numbers considering that i have a unichip my tuner has had alot of experience with unichips for a long time. By the way all this is still on stock fuel system and i have aps tumbler deletes.
doogie1 is offline   Reply With Quote
Old 09-11-2004, 06:48 AM   #19
Pacobeagle
Scooby Specialist
 
Member#: 8775
Join Date: Jul 2001
Chapter/Region: South East
Location: Mobile,AL
Vehicle:
2010 "Zed" 1000
Orange/White

Default

Sweet. What are you using for tranny? These guys down here are using the Sti gearset not RA.

Jose
Pacobeagle is offline   Reply With Quote
Old 09-11-2004, 08:45 PM   #20
doogie1
Scooby Newbie
 
Member#: 46149
Join Date: Oct 2003
Location: ohio
Vehicle:
2002 wrx STI HYBRID
wr blue

Default

Jose, my tranny is stock. The clutch is also stock with about 2500 miles on it so far.....Matt yes you can just slap your stock heads on the sti shortblock but make sure you get the gasket set when you get the block. You don't have to get the whole set but at least get the sti head gaskets. When the shop was breaking in the motor it had nothing to adjust any fuel the unichip was unplugged because they had a wideband on it and the ecu was adapting extreemly well that it didn't need any additional fuel and further into the breaking even taking it to 6k rpm at 10psi it was still doing fine. Well that was in the break in period i don't think it would be a good idea to leave it like that without some fuel adjustments after the break in period, hope that helps.
doogie1 is offline   Reply With Quote
Old 09-12-2004, 12:25 PM   #21
koki
Scooby Newbie
 
Member#: 45289
Join Date: Oct 2003
Default

im interested on doing this swap can anybody point me in the right direction on where can i get a hold of one of this blocks?
koki is offline   Reply With Quote
Old 09-12-2004, 01:15 PM   #22
MAD REX
Scooby Specialist
 
Member#: 18163
Join Date: Apr 2002
Location: Denver
Vehicle:
2002 2.5 WRX
MBP

Default

MAD REX is offline   Reply With Quote
Old 09-15-2004, 01:56 AM   #23
neversatisfied
Scooby Specialist
 
Member#: 42631
Join Date: Sep 2003
Chapter/Region: MWSOC
Location: Omaha, NE
Vehicle:
03 Subaru WRX
Silver T67 equipped

Default

I am running a Greddy T67 with Blitz FMIC. I dont think my turbo will have a problem keeping up.
neversatisfied is offline   Reply With Quote
Old 09-15-2004, 02:11 AM   #24
fogdor
Scooby Specialist
 
Member#: 45726
Join Date: Oct 2003
Vehicle:
2007 Mazdaspeed3
Cosmic Blue

Default

I would be very wary of doing any business with flat4engineering:

http://forums.nasioc.com/forums/showthread.php?t=619011

Theoretically, you can order the shortblock from any Subaru dealer.
fogdor is offline   Reply With Quote
Old 09-15-2004, 03:32 PM   #25
neversatisfied
Scooby Specialist
 
Member#: 42631
Join Date: Sep 2003
Chapter/Region: MWSOC
Location: Omaha, NE
Vehicle:
03 Subaru WRX
Silver T67 equipped

Default

Quote:
Originally Posted by fogdor
I would be very wary of doing any business with flat4engineering:

http://forums.nasioc.com/forums/showthread.php?t=619011

Theoretically, you can order the shortblock from any Subaru dealer.
Ouch, thanks for the heads up man.
neversatisfied 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
2.5L Sti Shortblock with 2.0 L WRX heads - Need STi Dipstick? skimobile Built Motor Discussion 5 06-13-2007 08:53 PM
2.5L crawford shortblock on 2.0L 2004 WRX heads mistaboosta Built Motor Discussion 11 04-05-2006 06:27 PM
what i am doing with my new 2.5l sti shortblock sonic rx Built Motor Discussion 3 03-31-2006 06:48 AM
2.5L STI shortblock on JDM heads and ECU? powerlabs Subaru Conversions 3 03-14-2006 07:21 PM
FS MD: 2.5L STi Shortblock, 2.5L Gasket Kit, STi Pinks (565CC) bryan carbon Private 'For Sale' Classifieds 3 01-27-2004 10:37 PM


All times are GMT -4. The time now is 01:49 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.