Welcome to the North American Subaru Impreza Owners Club Sunday February 1, 2015
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 10-22-2009, 09:14 PM   #1
SoloImpreza
Scooby Newbie
 
Member#: 42520
Join Date: Aug 2003
Chapter/Region: NESIC
Location: westbrook, ct
Vehicle:
99 impreza w ej205

Default HELP!!! 98 impreza 2.2 to 98 ej25 DOHC HELP!!!!

hey guys.

does anyone know if i can throw a ej25 98 DOHC Rs motor into a 98 2.2L impreza, plug and play.

basically i just need to know if wiring will match up. i have the ecu too if need be. thanks.
* Registered users of the site do not see these ads.

Last edited by SoloImpreza; 11-10-2009 at 06:49 PM.
SoloImpreza is offline   Reply With Quote
Old 10-23-2009, 12:45 AM   #2
jedz123
Scooby Newbie
 
Member#: 67083
Join Date: Jul 2004
Chapter/Region: NESIC
Location: Northfield, VT
Vehicle:
1993 Impreza L HB
EJ25D swap, 5-speed FWD

Default

I don't think it's plug and play... Because the crank sensors are different between the DOHC and SOHC. I'm pretty sure if you take a SOHC Phase 2 EJ25 and remove all the sensors and replace them with the EJ22 sensors, it should work. If you had a Phase 1 DOHC EJ25 you can run your intake and 2.2 heads and make it work, but I'm unsure how it would work retaining the DOHC cylinder heads.
jedz123 is offline   Reply With Quote
Old 10-23-2009, 02:50 AM   #3
morrocco88
Scooby Specialist
 
Member#: 104098
Join Date: Jan 2006
Chapter/Region: NWIC
Location: Eastern WA
Vehicle:
97' LGT 2.3 Dstroke
Rotated BW S256 6speed

Default

I'm planning on doing this too. I have a 98' DOHC 2.5 and plan to drop it in a 96' Impreza 2.2

From my research, it looks like it will work plug and play. The trick is to use all the 2.2 wiring and plug it onto the 2.5 motor. The cam and crank sensors are the same plug style, and the IAC valve should be the same as well. You do need the whole 2.5 motor including the manifold, because the 2.2 manifold will not bolt on the 2.5 heads...it's a different bolt pattern.

So basically the 2.2 ecu and wiring is running the 2.5 mechanics. The fuel trims should be close too since the 2.5 will have the injectors for that size motor.

I will soon find out when I complete the swap.
morrocco88 is offline   Reply With Quote
Old 10-23-2009, 02:47 PM   #4
vipergtrdj
Scooby Newbie
 
Member#: 131770
Join Date: Nov 2006
Vehicle:
2001 Subaru Impreza
Silver

Default

I am in the process of this - just with a '01 L to a ej22t/ ej25dohc and everything bolts up. I am using the 2.2 wiring and sensors, on the 2.5 intake manifold. But ran into a problem with the crank sensor - believe it got damaged when swapping as its throwing a CEL for P0336 CKT range/perf. I will swap that out and let you know how it goes.

I know its a little different from your swap, but electrical wise should be the same - ej25 running on ej22 ECU.
vipergtrdj is offline   Reply With Quote
Old 10-24-2009, 05:45 PM   #5
SoloImpreza
Scooby Newbie
 
Member#: 42520
Join Date: Aug 2003
Chapter/Region: NESIC
Location: westbrook, ct
Vehicle:
99 impreza w ej205

Default

well i have the EJ25 RS ECU

basically i bought a second RS for a wrx swap. my friend in his 1998 impreza needs a new engine. his 2.2 spun a bearing. so just wondering if i can throw my RS DOHC engine in his car!
SoloImpreza is offline   Reply With Quote
Old 11-07-2009, 09:21 PM   #6
silverWRX_02
Scooby Newbie
 
Member#: 123564
Join Date: Aug 2006
Chapter/Region: NESIC
Location: Haverhill, MA
Vehicle:
2001 Impreza L

Default

I'm not sure about the DOHC but I'm swapping a phase II 2.5L SOHC into my 2001 impreza L 2.2L and everything is plug and play. Only thing I have to change is the exhaust manifold to a dual port. I'd do that if I were you. I've heard the SOHC are better than the DOHC anyway.
silverWRX_02 is offline   Reply With Quote
Old 11-10-2009, 11:10 AM   #7
SoloImpreza
Scooby Newbie
 
Member#: 42520
Join Date: Aug 2003
Chapter/Region: NESIC
Location: westbrook, ct
Vehicle:
99 impreza w ej205

Default

ok guys, i have been trying to do some research that is narrowed to more of my exact swap issue and i cannot narrow it down. so far i got conflicting stories....

theories
1) swap the 98 DOHC RS motor in the My 98 Impreza 2.2L but swap sensors over

2)take ej22 engine harness and put it on ej25 98 engine

3) is theory 2 done because most people dont bother to get the ej25 ecu? basically is the engine harnesses swapped because of ej22 ecu running ej25?

basically i want to go into this project and be done with it. i dont want to mess around. i have a second impreza RS i am swapping, and this NA swap is for a friend. i dont have time to trouble shoot.

i have exhaust dual port headers, MY 98 Ej25 DOHC ECU, and complete MY 98 Engine.
SoloImpreza is offline   Reply With Quote
Old 11-10-2009, 06:47 PM   #8
SoloImpreza
Scooby Newbie
 
Member#: 42520
Join Date: Aug 2003
Chapter/Region: NESIC
Location: westbrook, ct
Vehicle:
99 impreza w ej205

Default

badabump
SoloImpreza is offline   Reply With Quote
Old 11-13-2009, 09:49 AM   #9
j.Mack
Scooby Newbie
 
Member#: 192347
Join Date: Oct 2008
Chapter/Region: MWSOC
Location: mILLwaukee, WI
Vehicle:
1997 RS2.5 I-Wagon
Black

Default

well I have a 98 RS motor in my 97 wagon, The PCM and harness was all plug and play, you will need the coil pack for the DOHC motor though as the 2.2 one does not work (or fit iirc). Pretty easy swap, imo, but if you want a full RS conversion, you will have to swap the PCM in, I wouldnt even bother with the harness. My 2.2 PCM handles its duties without one problem so its really up to you to put in what you want.
j.Mack is offline   Reply With Quote
Old 11-15-2009, 08:58 PM   #10
turbo01gc8
Scooby Newbie
 
Member#: 217973
Join Date: Jul 2009
Location: northern tier, PA
Vehicle:
2001 turbo impreza L
acadia green

Default

was thinking about this swap b/c i turboed my 01 impreza L w/ the 2.2L sohc. got 164K on it. will a complete 2.5 dohc swap work with my ecu? i am aware of the dual port header i have to get
turbo01gc8 is offline   Reply With Quote
Old 11-15-2009, 11:27 PM   #11
Storm
Scooby Guru
 
Member#: 5218
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
Vehicle:
96L Most Over-
Developed Beater

Default

Your answer is #2. Except just transfer the engine harness. You won't have a plug for the EGR, so leave it unhooked. The IACV may be a little different location wise, but otherwise plug and play.

Jay
Quote:
Originally Posted by SoloImpreza View Post
ok guys, i have been trying to do some research that is narrowed to more of my exact swap issue and i cannot narrow it down. so far i got conflicting stories....

theories
1) swap the 98 DOHC RS motor in the My 98 Impreza 2.2L but swap sensors over

2)take ej22 engine harness and put it on ej25 98 engine

3) is theory 2 done because most people dont bother to get the ej25 ecu? basically is the engine harnesses swapped because of ej22 ecu running ej25?

basically i want to go into this project and be done with it. i dont want to mess around. i have a second impreza RS i am swapping, and this NA swap is for a friend. i dont have time to trouble shoot.

i have exhaust dual port headers, MY 98 Ej25 DOHC ECU, and complete MY 98 Engine.
Storm is offline   Reply With Quote
Old 05-23-2014, 02:56 AM   #12
double0sport
Scooby Newbie
 
Member#: 375644
Join Date: Dec 2013
Location: keyser
Vehicle:
2000 impreza outback
purple

Default

Is it possible to swap the 2.5 rs top end onto a 00 ej22??
double0sport is offline   Reply With Quote
Old 10-04-2014, 06:47 PM   #13
erkkrose
Scooby Newbie
 
Member#: 402490
Join Date: Sep 2014
Default

Know if you can put a ej25t from an 07 impreza into a 98 with all the harnesses and ecu included with the 07 engine?
erkkrose 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
2006 WRX fuel pump fitting onto a 98 Impreza L 2.2?? silver06wrx Pre-2002 Factory Turbo Powertrain 1 04-08-2007 11:35 PM
I need a MT for a 98 impreza L 2.2 rufracer Private 'Wanted' Classifieds 0 03-17-2007 03:48 PM
98 Impreza L 2.2 White Sedan - CO - $3000 Jish Private Vehicle 'For Sale' Classifieds 1 08-02-2006 02:56 PM
98 Impreza L 2.2 kinda. kilahkam Private Vehicle 'For Sale' Classifieds 15 08-02-2006 11:55 AM
Selling 98 Impreza rs 2.5 automatic transmission blueimprezars2.5 Private 'For Sale' Classifieds 0 09-26-2005 01:24 AM


All times are GMT -4. The time now is 09:14 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.