ej22e to ej25d

Wolfenstein · 09-24-2011, 05:34 PM

Hey guys I picked up a 97 impreza with an EJ22e (sohc), and have an EJ25d (dohc) from a 97 legacy. I would like to put the EJ25d in it and would like to get some information about a few things.

1. can I use the 97 EH22e harness and ECU?

2. If yes to 1 is there any sensor changes or splicing that needs done?

3. If the Harness will work could I just swap the ECU?

This will be a complete engine swap not just heads. I do have the opportunity to get the ECU and harness from the legacy but if its not necessary I would like to know up front before I waist the time and money.

Thanks Again for any help or info

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69subaru360 · 09-24-2011, 06:58 PM

Wrong section.

But the wiring just plugs in and it will run on the existing ecu ok.

You need to get the dual port header from the legacy.

Wolfenstein · 09-24-2011, 07:05 PM

So it is. Sorry about that. Moderators please move.

I have a turbo manifold, UP, and DP from my Forester XT that I plan on using.

I'm sure it will run better with the correct ECU can I plug the Legacy ECU into my harness?

eg33GC · 09-24-2011, 08:14 PM

the 25d will run fine on the 22e ecu

subieguy87 · 10-02-2011, 09:49 AM

Quote:

Originally Posted by Wolfenstein

I have a turbo manifold, UP, and DP from my Forester XT that I plan on using

those are useless w/o the turbo,ic& cross member

Wolfenstein · 10-02-2011, 11:03 AM

I have all the stock parts from a 35R set up I did on my other impreza and the up, dp, turbo and ic from things I have upgraded on the Forester XT. I plan on modifying the stock 97 cross member to make room for the up pipe.

Frogg · 10-02-2011, 12:43 PM

Quote:

Originally Posted by eg33GC

the 25d will run fine on the 22e ecu

is this fact? so when my 22e dies I can just drop in the 25d without doing any wiring whatsoever? and everything will work properly and smoothly?

subieguy87 · 10-09-2011, 09:41 AM

Quote:

Originally Posted by Wolfenstein

I plan on modifying the stock 97 cross member to make room for the up pipe.

Then buy a stock turbo x member... Like from a turbo legacy... Like I have for my 98

iluvdrt · 10-19-2011, 12:24 PM

Quote:

Originally Posted by Wolfenstein

So it is. Sorry about that. Moderators please move.

I have a turbo manifold, UP, and DP from my Forester XT that I plan on using.

I'm sure it will run better with the correct ECU can I plug the Legacy ECU into my harness?

DO NOT boost the EJ25D. It will break. It uses smaller rod journals then other EJ engines and is weak. Dont believe me? Do a search.

Quote:

Originally Posted by Frogg

is this fact? so when my 22e dies I can just drop in the 25d without doing any wiring whatsoever? and everything will work properly and smoothly?

Yes, the engine is a direct swap. You need to change nothing except the header. I have done it several times.

Wolfenstein · 10-19-2011, 12:53 PM

This I know. I guess its a good thing I have a newer phase 2 sti crank, sti rods and pistons sitting around.($50 invested BTW) Before you get all worked up about the crank my father in law has a machine shop. So machining a number 5 thrust will cost me a big fat 0! So all said and done including machine work I will have about $350 in this complete engine. This is for a rally cross car I'm looking to spend as little as I can and have as much fun as possible. So far including cost of the car, the ej25d, full 5 speed swap and a RS hood I have about $1500 invested plus crap I had sitting around collecting dust.

Wolfenstein · 10-19-2011, 01:12 PM

Here is a guy that did a somewhat similar build. Now I'm not looking to run 20+ psi more like 7ish, but interesting none the less.

http://www.rs25.com/forums/f7/t39629-boosted-ej25d.html

09-24-2011, 05:34 PM	#1
Wolfenstein Scooby Newbie Member#: 153578 Join Date: Jul 2007 Chapter/Region: MWSOC Location: Cincinnati, Ohio "Eastside" Vehicle: 03 WRC WideBody 04 Forester XT	ej22e to ej25d Hey guys I picked up a 97 impreza with an EJ22e (sohc), and have an EJ25d (dohc) from a 97 legacy. I would like to put the EJ25d in it and would like to get some information about a few things. 1. can I use the 97 EH22e harness and ECU? 2. If yes to 1 is there any sensor changes or splicing that needs done? 3. If the Harness will work could I just swap the ECU? This will be a complete engine swap not just heads. I do have the opportunity to get the ECU and harness from the legacy but if its not necessary I would like to know up front before I waist the time and money. Thanks Again for any help or info * Registered users of the site do not see these ads.

10-19-2011, 12:53 PM	#10
Wolfenstein Scooby Newbie Member#: 153578 Join Date: Jul 2007 Chapter/Region: MWSOC Location: Cincinnati, Ohio "Eastside" Vehicle: 03 WRC WideBody 04 Forester XT	This I know. I guess its a good thing I have a newer phase 2 sti crank, sti rods and pistons sitting around.($50 invested BTW) Before you get all worked up about the crank my father in law has a machine shop. So machining a number 5 thrust will cost me a big fat 0! So all said and done including machine work I will have about $350 in this complete engine. This is for a rally cross car I'm looking to spend as little as I can and have as much fun as possible. So far including cost of the car, the ej25d, full 5 speed swap and a RS hood I have about $1500 invested plus crap I had sitting around collecting dust. Last edited by Wolfenstein; 10-19-2011 at 12:58 PM.

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09-24-2011, 06:58 PM	#2
69subaru360 Scooby Guru Member#: 159682 Join Date: Sep 2007 Chapter/Region: NESIC Location: Belfast Maine Vehicle: 1995 WRX	Wrong section. But the wiring just plugs in and it will run on the existing ecu ok. You need to get the dual port header from the legacy.

09-24-2011, 07:05 PM	#3
Wolfenstein Scooby Newbie Member#: 153578 Join Date: Jul 2007 Chapter/Region: MWSOC Location: Cincinnati, Ohio "Eastside" Vehicle: 03 WRC WideBody 04 Forester XT	So it is. Sorry about that. Moderators please move. I have a turbo manifold, UP, and DP from my Forester XT that I plan on using. I'm sure it will run better with the correct ECU can I plug the Legacy ECU into my harness?

09-24-2011, 08:14 PM	#4
eg33GC Scooby Specialist Member#: 206851 Join Date: Mar 2009 Chapter/Region: MWSOC Vehicle: 99 V4 EJ20K RS	the 25d will run fine on the 22e ecu

10-02-2011, 11:03 AM	#6
Wolfenstein Scooby Newbie Member#: 153578 Join Date: Jul 2007 Chapter/Region: MWSOC Location: Cincinnati, Ohio "Eastside" Vehicle: 03 WRC WideBody 04 Forester XT	I have all the stock parts from a 35R set up I did on my other impreza and the up, dp, turbo and ic from things I have upgraded on the Forester XT. I plan on modifying the stock 97 cross member to make room for the up pipe.

10-19-2011, 01:12 PM	#11
Wolfenstein Scooby Newbie Member#: 153578 Join Date: Jul 2007 Chapter/Region: MWSOC Location: Cincinnati, Ohio "Eastside" Vehicle: 03 WRC WideBody 04 Forester XT	Here is a guy that did a somewhat similar build. Now I'm not looking to run 20+ psi more like 7ish, but interesting none the less. http://www.rs25.com/forums/f7/t39629-boosted-ej25d.html