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 > Subaru Conversions

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 06-03-2004, 03:39 PM   #1
marksWRX03
Scooby Newbie
 
Member#: 46029
Join Date: Oct 2003
Default 03 USDM EJ20 -> 97 JDM EJ20 swap

my motor in my 03 took a crap and it isnt under warantee. I can get a 97 EJ20 longblock for a good price, but i was wondering whats involved, is it a bolt in/use stock harness affair, or due to the age difference is there different wiring that needs to be done? also, will this work inconjunction with the 03 ECU?

thanks
marksWRX03 is offline   Reply With Quote
Old 06-04-2004, 01:12 PM   #2
marksWRX03
Scooby Newbie
 
Member#: 46029
Join Date: Oct 2003
Default

anyone?
marksWRX03 is offline   Reply With Quote
Old 06-04-2004, 02:39 PM   #3
Zephyr
Scooby Specialist
 
Member#: 3362
Join Date: Dec 2000
Location: Central NJ
Vehicle:
2001 I've wired a
Few cars in my day

Default

Two completely different engines. Don't bother. If you were getting a V7 or V8 I would say yes but dropping in a 7 year old engine is not the best idea.

Z
Zephyr is offline   Reply With Quote
Old 06-04-2004, 02:46 PM   #4
Jaxx
NASIOC Supporter
 
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
Vehicle:
The 93 Imp W/EJ20K
flat black

Default

depends on what went bad on you engine .. you *might* be able to swap the short block but as zepher said the engines are totaly differnt
Jaxx is offline   Reply With Quote
Old 06-04-2004, 06:47 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

Actually,
the '97 to '99 EJ20K engines are the best bang for the buck you can find. They were rated at 276hp in Japan and use the same block and head cores as the STi engines of that generation. The block it semi-closed deck and the heads are the big port variety that flow way better than USDM heads. One of the reasons for the change to using EJ205's(what was previously the EJ20 export market engine) in Japan for regular WRX's and EJ207's for Sti's was because guys with plain jane WRX's could easily get STi level power with a bigger turbo and a handful of bolt ons. That '97 engine is a superior engine to the one you blew up, and would be a worthy replacement for it.

Putting it in would be identical to replacing the EJ205 that you blew up. Just switch your wiring harness and sensors over to the EJ20K and bolt it in. Just make sure it is in fact an EJ20K and not an engine from Australia or some other export market...
Matt Monson is offline   Reply With Quote
Old 06-04-2004, 08:56 PM   #6
Jaxx
NASIOC Supporter
 
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
Vehicle:
The 93 Imp W/EJ20K
flat black

Default

I
guess you would need to swap over the 205 intake manafold .. to the 20k long block the K manafold is differnt your intercooler won't fit

the cam and crank sensors are the same ...
you will still have proublems with the fuel map
and the coil on plug won't bolt on
Jaxx is offline   Reply With Quote
Old 06-04-2004, 10:44 PM   #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

The EJ20K's dont' have coil on plug. In '97 when they redesigned the intake to run under the manifold, they also switched to the coil pack with wasted spark. And if he is getting a long block, he should be getting both the manifold and the TMIC from the K...
Matt Monson is offline   Reply With Quote
Old 06-08-2004, 04:04 AM   #8
marksWRX03
Scooby Newbie
 
Member#: 46029
Join Date: Oct 2003
Default

awesome, but if its still got the VF22 turbo, wheres the extra HP coming from? the heads cant help THAT much.

Quote:
Originally posted by Matt Monson
Actually,
the '97 to '99 EJ20K engines are the best bang for the buck you can find. They were rated at 276hp in Japan and use the same block and head cores as the STi engines of that generation. The block it semi-closed deck and the heads are the big port variety that flow way better than USDM heads. One of the reasons for the change to using EJ205's(what was previously the EJ20 export market engine) in Japan for regular WRX's and EJ207's for Sti's was because guys with plain jane WRX's could easily get STi level power with a bigger turbo and a handful of bolt ons. That '97 engine is a superior engine to the one you blew up, and would be a worthy replacement for it.

Putting it in would be identical to replacing the EJ205 that you blew up. Just switch your wiring harness and sensors over to the EJ20K and bolt it in. Just make sure it is in fact an EJ20K and not an engine from Australia or some other export market...
marksWRX03 is offline   Reply With Quote
Old 06-08-2004, 10:48 AM   #9
Jaxx
NASIOC Supporter
 
Member#: 177
Join Date: Aug 1999
Chapter/Region: NWIC
Location: Boise,Idaho,USA
Vehicle:
The 93 Imp W/EJ20K
flat black

Default

Quote:
Originally posted by Matt Monson
The EJ20K's dont' have coil on plug. In '97 when they redesigned the intake to run under the manifold, they also switched to the coil pack with wasted spark.
right.. but your missing the fact that he has 205 wireing ..

the simplest path is to make it run is with 205 wireing+205 sensors .. and probbaly 205 heads..

marks: .. from the vf-22 .. which is the largest turbo subaru has ever put on a car
Jaxx is offline   Reply With Quote
Old 06-08-2004, 09:44 PM   #10
marksWRX03
Scooby Newbie
 
Member#: 46029
Join Date: Oct 2003
Default

so what, it has a larger compressor wheel in it with a ported housing? i still dont see where the extra HP is coming from
marksWRX03 is offline   Reply With Quote
Old 06-09-2004, 08:13 AM   #11
yebokmj
Scooby Specialist
 
Member#: 2213
Join Date: Aug 2000
Chapter/Region: South East
Location: Raymond, NH USA
Vehicle:
1995 Impreza w/EJ257
Brilliant Red

Default Heads and coil on plug

The older engine might have heads that will recieve the coil on plug setup. I know my MY97 DOHC 2.5 heads have the bolt holes to recieve them for some random reason. Just thought I would throw this out there. Also a custom ECU reflash would probably be in order to address some of the issue you would run into with a differant engine than the ECU. IE no tumble vavles.
Joshua
yebokmj 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
03 WRX drivetrain ---> 97 OBS fourstrokephysics Subaru Conversions 5 09-06-2012 12:30 PM
JDM EJ20 STi ver8 Engine Swap --> $7499 jdm-online.com Engine/Power/Exhaust 12 07-30-2009 10:09 PM
03 USDM wrx seat vs JDM V8 seats vortectoy Interior & Exterior Modification 5 01-20-2007 06:14 PM
97 JDM sti swap in 97 impreza CEL flashes, won't hit full boost HELP WRXlerate Subaru Conversions 13 05-31-2005 12:30 PM
Using a usdm ej20 block with jdm ej20 bottom end, whats the block diffrence with sti Turbo Tin Can Factory 2.0L Turbo Powertrain 2 12-02-2003 03:13 AM


All times are GMT -4. The time now is 11:05 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.