Welcome to the North American Subaru Impreza Owners Club Friday September 19, 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 2.5L 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 01-22-2013, 02:04 AM   #1
chrisd87
Scooby Newbie
 
Member#: 344446
Join Date: Jan 2013
Location: Quebec
Vehicle:
2012 Wrx sti

Default 2010 Sti engine in 2008 wrx...Plug and play?

So I recently picked up a 2008 Wrx with a blown engine for peanuts (broken ringland seemed to put it out of service). I stripped the whole engine and I'm ready to buy a new shortblock and all the garnishing. It then struck me that for the same price I can buy a complete Wrx sti engine (I'm about to buy a 2010 smashed Sti...for peanuts). Now my question is; would the 08+ Wrx STI engine work plug and play in the 2008 wrx? Would a simple swap of engine and Ecu put it all to work? I believe the Sti doesn't have acvs cams but logically if i swapped out Ecu's I shouldn't have a problem. Is there anyone here than can confirm what would work/wouldn't?!

Chris
* Registered users of the site do not see these ads.
chrisd87 is offline   Reply With Quote
Old 01-22-2013, 02:40 AM   #2
Kinjirra
Scooby Newbie
 
Member#: 258345
Join Date: Sep 2010
Chapter/Region: MAIC
Location: Charles Town, WV
Vehicle:
2013 WRX
Plasma Blue

Default

Quote:
Originally Posted by chrisd87 View Post
So I recently picked up a 2008 Wrx with a blown engine for peanuts (broken ringland seemed to put it out of service). I stripped the whole engine and I'm ready to buy a new shortblock and all the garnishing. It then struck me that for the same price I can buy a complete Wrx sti engine (I'm about to buy a 2010 smashed Sti...for peanuts). Now my question is; would the 08+ Wrx STI engine work plug and play in the 2008 wrx? Would a simple swap of engine and Ecu put it all to work? I believe the Sti doesn't have acvs cams but logically if i swapped out Ecu's I shouldn't have a problem. Is there anyone here than can confirm what would work/wouldn't?!

Chris
Sounds interesting and If you did a complete swap I cant see it not working(complete as in full harness, dash etc etc etc). Otherwise I'm sure there will be some splicing and other fun stuff to deal with though not totally sure on that. Either way best of luck
Kinjirra is offline   Reply With Quote
Old 01-22-2013, 12:07 PM   #3
LUMBERZACK
Scooby Specialist
 
Member#: 340009
Join Date: Dec 2012
Chapter/Region: SWIC
Location: Arizona
Vehicle:
2007 STi
48W

Default

Might as well put the STi tranny in there too while you're at it.
LUMBERZACK is offline   Reply With Quote
Old 01-22-2013, 01:43 PM   #4
AWD Freak
Scooby Specialist
 
Member#: 262593
Join Date: Oct 2010
Chapter/Region: MWSOC
Default

Quote:
Originally Posted by chrisd87 View Post
I believe the Sti doesn't have acvs cams but logically if i swapped out Ecu's I shouldn't have a problem.

Chris
That's cause 2008 and newer Sti's have dual avcs.
AWD Freak is offline   Reply With Quote
Old 01-23-2013, 09:27 PM   #5
roadtrip1098
Scooby Newbie
 
Member#: 185688
Join Date: Jul 2008
Chapter/Region: NESIC
Location: Maine
Vehicle:
2006 STi
WR Blue

Default

The blocks are the same, the heads are different. A friend of mine had an 08 WRX that blew the motor and he replaced the short block with one from an STi, no wiring issues, no ecu swap. With the STi motor you're gaining a forged crank. As others mentioned though, you may want to use the STi transmission and other drivetrain components and at that point, you may as well do a complete swap (ecu and everything) and turn the WRX into an STi. Is the 08 by chance a sedan? The idea of an 08 STi sedan without the ridiculous fenders is kind of appealing.
roadtrip1098 is offline   Reply With Quote
Old 01-25-2013, 08:46 PM   #6
chrisd87
Scooby Newbie
 
Member#: 344446
Join Date: Jan 2013
Location: Quebec
Vehicle:
2012 Wrx sti

Default

thanks for the replies, the car is a hatchback. Turns out I would be swapping only the engine from the Sti, which I was told involves swapping ecu's... which could cause some confusion due to BCM and TCM communication differences. I will most likely rebuild the Wrx engine inless I know for sure I can plug the Sti engine/harness into the wrx and simply re-tune ecu and maybe change up heads with the wrx to keep factory exhaust avcs gears.
chrisd87 is offline   Reply With Quote
Old 01-25-2013, 08:46 PM   #7
chrisd87
Scooby Newbie
 
Member#: 344446
Join Date: Jan 2013
Location: Quebec
Vehicle:
2012 Wrx sti

Default

Quote:
Originally Posted by AWD Freak View Post
That's cause 2008 and newer Sti's have dual avcs.

Dual= intake and exhaust?
chrisd87 is offline   Reply With Quote
Old 05-03-2014, 11:49 PM   #8
MiguelGL
Scooby Newbie
 
Member#: 389844
Join Date: May 2014
Default

Quote:
Originally Posted by chrisd87 View Post
So I recently picked up a 2008 Wrx with a blown engine for peanuts (broken ringland seemed to put it out of service). I stripped the whole engine and I'm ready to buy a new shortblock and all the garnishing. It then struck me that for the same price I can buy a complete Wrx sti engine (I'm about to buy a 2010 smashed Sti...for peanuts). Now my question is; would the 08+ Wrx STI engine work plug and play in the 2008 wrx? Would a simple swap of engine and Ecu put it all to work? I believe the Sti doesn't have acvs cams but logically if i swapped out Ecu's I shouldn't have a problem. Is there anyone here than can confirm what would work/wouldn't?!

Chris
Chris, I want to know if you do your swap cause I'm in the same situation like you. Want to drop an sti engine in a 2010 wrx.

thanks
MiguelGL is offline   Reply With Quote
Old 05-04-2014, 10:23 AM   #9
norexyet
Scooby Specialist
 
Member#: 39149
Join Date: Jun 2003
Chapter/Region: Tri-State
Location: Wild Rides Race Cars
Vehicle:
11 elantra
yea i said elantra

Default

Quote:
Originally Posted by chrisd87 View Post

Dual= intake and exhaust?
Correct. Both intake and exhaust cams are avcs. As for the guy that said you gain a forged crank with an sti motor. That's not true. Both motors use the same one.
norexyet is offline   Reply With Quote
Old 05-04-2014, 11:20 AM   #10
chrisd87
Scooby Newbie
 
Member#: 344446
Join Date: Jan 2013
Location: Quebec
Vehicle:
2012 Wrx sti

Default

I ended up building a shortblock and swapping out my damaged wrx heads for b25 sti heads, engine has been running strong ever since. The Sti swap can be done although you will have to swap everything over. Swap over an Ej257 shortblock and call it a day.
chrisd87 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


All times are GMT -4. The time now is 04:49 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.