Compatability will 1.8L, 2.2L and 2.5 motors - Subaru Impreza GC8 & RS Forum & Community: RS25.com

emsmap · 12-14-2009, 08:36 AM

Ok i have confusion with compatability with the 1.8L, 2.2L and 2.5L parts. For instance the intake manifolds and sensors. Why would I need a different ECU if I put phase I or phase II 2.2L in my car (96L) Whats the differance between 1993-2001 intake manifolds and impreza L motors? Will a intake manifold from a 1993 1.8L fit on a 2001 2.2L? Can someone coach me through some stuff? I have been reading through different threads and forums. When I finally think "Sweet a phase II 2.2L will work fine in my 96 L, I ask and people say no it wont; you need a new wiring harness" I am just confused. Also does it matter if I get a 2.2L out of a manual 5 speed car and bolt it to my 4EAT auto car? Will it work fine with my Auto ECU? So much to take in lol

Storm · 12-14-2009, 01:00 PM

I don't have time to give a tutorial right now, but suffice to say....there are easy ways to make swaps happen and there are hard ways.

If you keep your current engine harness and sensors, the ECU won't know what motor you have in there....it will just continue to try and keep the A/F within it's tolerance. It's just a machine......it doesn't care what it's controlling, only that it CAN or CANNOT control it.

I'll try to elaborate later......

emsmap · 12-14-2009, 01:58 PM

Storm:

Yeah I get that part, I just dont get what people say when they tell me "You need a whole new engine harness and ECU to run a phase II 2.2 in place of my phase I 2.2. What would I need if I wanted to run a 2.5L in my car? Would I need a full engine harness and ECU? Could I use my 4EAT Tranny?

emsmap · 12-18-2009, 05:46 AM

any info?

STiJard · 12-18-2009, 06:19 AM

Quote:

Originally Posted by emsmap

Storm:

Yeah I get that part, I just dont get what people say when they tell me "You need a whole new engine harness and ECU to run a phase II 2.2 in place of my phase I 2.2. What would I need if I wanted to run a 2.5L in my car? Would I need a full engine harness and ECU? Could I use my 4EAT Tranny?

There seem to be a lot of people talking about "hybrid" motors here, which I believe is a 2.5 N/A short block (any phase) with 2.2 (phase 1) heads. Since your car is already wired to use phase 1 2.2 heads (right?), you could do that. That might be your best option.

From what I understand, the phase II stuff is OBD 2 (maybe?) and that's what makes you need to rewire in order to run it.

Is your car OBD I still?

STiJard · 12-18-2009, 06:26 AM

Oh, and a motor out of an auto or manual car shouldn't matter. It's the ECU in the car that matters. The ECU needs to match the transmission.

Storm · 12-18-2009, 06:37 AM

Quote:

Originally Posted by emsmap

Storm:

Yeah I get that part, I just dont get what people say when they tell me "You need a whole new engine harness and ECU to run a phase II 2.2 in place of my phase I 2.2. What would I need if I wanted to run a 2.5L in my car? Would I need a full engine harness and ECU? Could I use my 4EAT Tranny?

Okay, looking at your profile, you have a 96 L with an EJ22. If you want to run an EJ25 with as little drama as possible, go with a EJ25D since the intake manifold has the external IACV already, which matches your current setup. This swap should literally be plug&play. Put your EJ22 engine harness on the EJ25 and swap the coil to it. All the plugs should be the same shape, except maybe the evap solenoids or AC air assist solenoid, which can be brought over from the EJ22 as well.

zze86 · 12-20-2009, 03:51 PM

^ doesn't the timing get thrown off? I mean you're going from a SOHC to a DOHC...?

emsmap · 12-21-2009, 07:58 AM

Wait a sec. I have OBD2 though. I was just told my motor is a phase 1. I guess it could be a phase II, I dont know. All I know, its a 96 L with a 2.2L automatic.

xreign · 12-22-2009, 02:52 PM

Bump for more input needed.

12-14-2009, 08:36 AM	#1 (permalink)
emsmap 2.2L Car: 2002 PSM WRX, 96 Impreza L 2.2 Fav Mod: PPGs,UTEC,Coilovers,0Cats My: Subaru Parts Join Date: Jun 2009 Location: Martinsburg WV Trader Rating: (0) Posts: 172	Compatability will 1.8L, 2.2L and 2.5 motors Ok i have confusion with compatability with the 1.8L, 2.2L and 2.5L parts. For instance the intake manifolds and sensors. Why would I need a different ECU if I put phase I or phase II 2.2L in my car (96L) Whats the differance between 1993-2001 intake manifolds and impreza L motors? Will a intake manifold from a 1993 1.8L fit on a 2001 2.2L? Can someone coach me through some stuff? I have been reading through different threads and forums. When I finally think "Sweet a phase II 2.2L will work fine in my 96 L, I ask and people say no it wont; you need a new wiring harness" I am just confused. Also does it matter if I get a 2.2L out of a manual 5 speed car and bolt it to my 4EAT auto car? Will it work fine with my Auto ECU? So much to take in lol Last edited by emsmap; 12-14-2009 at 08:40 AM..

12-14-2009, 01:00 PM	#2 (permalink)
Storm 2.5L RS-T My: Subaru Parts Join Date: Dec 2001 Location: NE Ohio Trader Rating: (20) Posts: 5,840	I don't have time to give a tutorial right now, but suffice to say....there are easy ways to make swaps happen and there are hard ways. If you keep your current engine harness and sensors, the ECU won't know what motor you have in there....it will just continue to try and keep the A/F within it's tolerance. It's just a machine......it doesn't care what it's controlling, only that it CAN or CANNOT control it. I'll try to elaborate later...... __________________ Jay Storm

12-20-2009, 03:51 PM	#8 (permalink)
zze86 2.2L Car: 1996 Impreza L Wagon Fav Mod: 3/8 Ratchet & Socket Set My: Subaru Parts My: Subaru Blog Join Date: Nov 2008 Location: Madison, WI Trader Rating: (4) Posts: 193	^ doesn't the timing get thrown off? I mean you're going from a SOHC to a DOHC...? __________________ My GF8 build Journal

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12-14-2009, 01:58 PM	#3 (permalink)
emsmap 2.2L Car: 2002 PSM WRX, 96 Impreza L 2.2 Fav Mod: PPGs,UTEC,Coilovers,0Cats My: Subaru Parts Join Date: Jun 2009 Location: Martinsburg WV Trader Rating: (0) Posts: 172	Storm: Yeah I get that part, I just dont get what people say when they tell me "You need a whole new engine harness and ECU to run a phase II 2.2 in place of my phase I 2.2. What would I need if I wanted to run a 2.5L in my car? Would I need a full engine harness and ECU? Could I use my 4EAT Tranny?

12-18-2009, 05:46 AM	#4 (permalink)
emsmap 2.2L Car: 2002 PSM WRX, 96 Impreza L 2.2 Fav Mod: PPGs,UTEC,Coilovers,0Cats My: Subaru Parts Join Date: Jun 2009 Location: Martinsburg WV Trader Rating: (0) Posts: 172	any info?

12-18-2009, 06:26 AM	#6 (permalink)
STiJard 2.0L Car: 1995 Impreza L My: Subaru Parts Join Date: Apr 2003 Location: Murrland Trader Rating: (0) Posts: 81	Oh, and a motor out of an auto or manual car shouldn't matter. It's the ECU in the car that matters. The ECU needs to match the transmission.

12-21-2009, 07:58 AM	#9 (permalink)
emsmap 2.2L Car: 2002 PSM WRX, 96 Impreza L 2.2 Fav Mod: PPGs,UTEC,Coilovers,0Cats My: Subaru Parts Join Date: Jun 2009 Location: Martinsburg WV Trader Rating: (0) Posts: 172	Wait a sec. I have OBD2 though. I was just told my motor is a phase 1. I guess it could be a phase II, I dont know. All I know, its a 96 L with a 2.2L automatic.

12-22-2009, 02:52 PM	#10 (permalink)
xreign 1.8L Car: 06 cgm sti & 95 impreza L Fav Mod: STOCK My: Subaru Parts Join Date: Dec 2008 Location: DE Trader Rating: (0) Posts: 45	Bump for more input needed.

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