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 > 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 06-25-2003, 11:08 AM   #1
SDEWYZ
Scooby Newbie
 
Member#: 31352
Join Date: Dec 2002
Location: Phoenix, AZ
Vehicle:
98 RS
Black....for now

Exclamation Definitive thread on EJ20 swap into GC8

OK after going through loads of stuff and searches, I would appreciate if someone can put into a simple list what is needed. I have a 98 RS and looking to put an earlier 94-95 EJ2O motor in. Besides the motor what is everything I will need for the basic swap. ECU? crossmembers? will tranny bolt up? I know many people have done this, but I can't get straight answers about some things and diff people have diff opinions. I appreciate anyone who can lay out exactly what is needed and what problems I will run into. It would be very appreciated. Thanks

Also....updated vendor list on where to buy quality used motors.
SDEWYZ is offline   Reply With Quote
Old 06-25-2003, 11:18 AM   #2
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

conversion forum perhaps?
Jaxx is offline   Reply With Quote
Old 06-25-2003, 12:38 PM   #3
Puckaveli
Scooby Specialist
 
Member#: 1518
Join Date: May 2000
Location: Stow, OH
Vehicle:
00 2.5RS
Silver

Default

When you say a 94-95 EJ20 I would assume your getting a JDM one? The thing with Jdm's it isn't a matter of what you need but what you get. Some items can be obtained through aftermarket parts some need to be OEM. Plus there are 100 of variables that come with different motors and components to get them in and working. Basicly any EJ motor will drop right into the GC chassis and any TV,TY,and TZ tranny will mate up to the engine, but then you need to make sure the diffs match the tranny. The easiest way find out what you need is to let us know what you have. That's why there isn't a simple list of what parts you need, because most cases are different. I'm not saying you SOL, but there's no simple answer. I have a 94 WRX JDM motor and drivetrain in my garage and have done a ton of research so I might be able to get you some answers.
Puckaveli is offline   Reply With Quote
Old 06-26-2003, 08:21 PM   #4
99WRXEJ20
Scooby Specialist
 
Member#: 34545
Join Date: Mar 2003
Chapter/Region: MWSOC
Location: Worthington, Ohio
Vehicle:
1999 GC8
74f

Default

just got done with a 95 jdm swap, but puckaveli basicly said what i was thinking.

If there is one piece of advice, get a whole front clip and not just the engine, tranny and ecu.

if there is any direct questions, pm me.
99WRXEJ20 is offline   Reply With Quote
Old 06-27-2003, 01:08 AM   #5
HomerJay
Scooby Specialist
 
Member#: 1135
Join Date: Mar 2000
Chapter/Region: BAIC
Location: BAICED
Vehicle:
2005 WRX WAGON
Silver

Default

Yup, I'm planning on doing the whole front clip also. engine, tranny, rear diff. That way I don't have to worry about wiring and stuff.
HomerJay is offline   Reply With Quote
Old 06-28-2003, 01:49 AM   #6
vsigma
Scooby Specialist
 
Member#: 3664
Join Date: Jan 2001
Chapter/Region: Tri-State
Location: London and North Joisey
Vehicle:
2005 broken
forester

Default

also see if the engine/ecu setup you are getting has that infamous security system that subaru engineered into some of the JDM cars, but did not make it over to the US market - namely a key with a transmitter that works with the ecu. without this key, the ecu is almost as good as useless.

Assuming stock RS - this is your quasi-definitive list of needs:
(I assume here that you are getting a STi engine)

- Turbo cross member (failing that, any wrx cross member will work)
- Complete engine (turbo/IC/radiator - oh yeah, radiator supports since they're different!), wiring harness, ecu
- tranny + matching diff (if possible) which opens up the options which ill list in a moment
- half-shafts and axels.

options:
- matching 4 pot fronts and 2 pot rear (which usually means you have a R180 rear diff, as opposed to the R160 we have) brakes
- variable centre diff - which you'll need the controller (separate), wiring, and matching switch
- other suspension bits that may or may not come with what you buy

things to look out for
- avoid the twin turbo ej20 engines - as the 2ndary turbo will give you clearance issues - not that it's not doable, but it's a hell of a lot more work
- get compression/leak down test numbers, along with mileage on setup if possible
- warrenty if possible (i.e. not DOA and so on)

Things i recommend you do while you're partially tearing the car apart and trying to put the new one in
- Clean the IC with either gasoline or other cleaner - as it's probably dirty
- do the tune up/prep work while it's out if you have the room/tools to do it (i.e. get the engine running before you stuff it into the car)
- fix any suspension stuff while the engine/trans is out - it's just a lot easier that way.

oh yeah, did i mention that you should also keep about another grand in CASH handy - in case you need to score things that you didn't realize you need, or just found out doesn't work.

even with the assistance of a very large hammer.

I've learned this from doing a couple of swaps - into imprezas and foresters. I still think the impreza is the easiest and most flexible out of the lot to do.

One note: You're not exactly limited to the STi engines out of an impreza. One intriguing prospect that i recommend doing (assuming you have the time/resources) is to find a Forester STi engine with the matching diff and so on. In all reality, you'll never find a place to really go as fast as you'd like. So why get some more torque and have a lot more fun in between the gears instead? The essential difference between the Forester and Impreza STi engines are the cams and the ecu mapping to compensate for those things. Imprezas have higher hp/lesser tq, whilst the Forester has higher tq/lower hp to account for the extra mass. But since you don't have the extra mass, you'll be amazed at the extra performance.

Yes, this torque over hp route is not conventional - but it's more fun based upon my rally experience.

-victor
vsigma 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
completed EJ20 swap into 2.5RS parts left over for sale erice1984 Private 'For Sale' Classifieds 12 10-19-2005 02:04 AM
Anyone who has done a JDM EJ20 swap into GC8s... MADDADDY Subaru Conversions 6 06-29-2005 07:04 PM
HELP! with my JDM 96' ej20 swap into 94 impreza.... lotus2843 Subaru Conversions 4 06-21-2005 04:29 PM
ej20 swap into RS engine mgmt options PRODRIVEN Subaru Conversions 17 03-22-2004 11:39 AM
('93-'01) EJ20 Engine Swap into GC8 erice1984 Impreza Forum 15 03-04-2003 10:19 AM


All times are GMT -4. The time now is 03:10 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.