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Old 12-06-2003, 04:47 PM   #1
d4d4d4d4
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Question Older ej22 to ej25 Phase 1 or Phase 2? Which one?

I'm sorry that this subject has already been rehashed millions of time, but I have a question that I haven't been able to answer yet.

I have a 90 legacy 2.2 na. I had read a slight bit of info saying that I can swap in a 2.5 for pretty cheap and easy. From what I understand, I can swap in either the phase 1 or 2 engines if I use only the 2.5 engine block and heads. The Throttle body and intake manifold will bolt right onto either 2.5 blocks, right?

My main question is which phase 2.5 should I get? Is it really as easy as unplugging everything from the 2.2 and removing it and then bolting in a 2.5 block and plugging all the 2.2 components onto the 2.5?

Another possibility:

If the 2.2 to 2.5 swap turns out to be too much money and headaches, couldn't I get a phase 2 2.2 and swap that in with absolute ease? The newer phase II 2.2 put out a considerable amount of more horsepower than the old 2.2's. Old 2.2= 130hp : New 2.2 = ~149hp.

In all, my goal is to get another engine into my car, but at the same time increase my hp if it doesn't require much more time and money.

---thanks
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Old 12-06-2003, 05:31 PM   #2
yebokmj
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Default Some Info

The general rule is that Phase II is better for it's the newer improved engine. But if your just looking for a stock engine that's not going to be boosted or anything, either engine will suit your needs. The intake manifolds for SOHC 2.5 heads are not compatable with the heads of DOHC 2.5 and and I don't believe your 2.2 manifold would be compatable with any of the heads on the 2.5 blocks. But due to a lot of the changes that took place in MY99 (impreza) and MY00(legacy) to 2.5 and 2.2 ECU's and therefore the electronics on the manifold and such(idle air control valve and other systems) I feel the 2.5 DOHC would make for the simplest swap using the existing electronics from the 2.2 and it's ECU.
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Old 12-06-2003, 06:20 PM   #3
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yes from what I know the phase II 99-01 manifolds will not mate up to the phase I heads correctly. I would go all phase I because your ECU is a MAF system and the phase II are MAP
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Old 12-06-2003, 07:20 PM   #4
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thanks for the info.

Do you know anything about putting a 99 phase II ej22 into older 2.2 cars? Same hassles as putting in a 2.5? I would be more than happy with the 19 more horses out of the newer 2.2, but the option of getting 35 more horses sounds even better.
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Old 12-06-2003, 07:51 PM   #5
yebokmj
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Default 2.2

The 2.2 wouldn't be worth your time. It would be the same hassel as doing a 2.5 plus you probably wouldn't see all those 19hp gain since some of it based apon the ecu mapping not just the engine itself.
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Old 12-07-2003, 03:33 AM   #6
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Just get a Legacy Turbo motor
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Old 12-07-2003, 06:10 PM   #7
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Quote:
Originally posted by Kostamojen
Just get a Legacy Turbo motor
thats what I would do to, if you are going to go through all that trouble you may as well put in a motor that has major HP potential, once you get a bit of power, its not long before you want more
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Old 12-07-2003, 06:58 PM   #8
d4d4d4d4
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It would require just as much time and money to put in a 2.2t as it would a 2.0t. The 2.0t has more after market options on it.

In either case, I'm gonna have replace the engine wiring and ECU if I'm going to go the turbo route. I'm looking at doing as little amount of modification as possible. I had my hopes set for getting a phase II 2.5 in there, but that aparently is a lot of work compared involved. The phase I 2.5 would've been a good bet, but I'm not to keen on buying one used or even new, because of the gasket problems, I want somthing that will last, plus I'm a low end lover. I've driven my freind's 2001 rs around and I'm hooked on that low end torque (I do a lot of off roading, where a small block turbo won't cut it for gunting around slowly).

Looks like I'm stuck with the same old 2.2....... for now... hehe

I can't imagine how fast this car would feel if I eventually put double the horsies under the hood. It would be the perfect "INVISAMOBILE" -- > totally invisible to cops, smashes off the line, but at the same time also invisible to chicks!!!
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Old 12-07-2003, 07:05 PM   #9
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Default Headgasket problem?

There is not headgasket problem on the DOHC engine that's not easily fixed with an hour or so extra labor and 60 dollars for gasket. The problem has been address with a creation of a new gasket. And the hardest part of replaceing a headgasket is removing and installing the engine. The rest is just a little time. Engine will already be out of the car.
Joshua
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Old 12-08-2003, 02:18 PM   #10
d4d4d4d4
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so the Phase 1 2.5's just have faulty head gaskets? I thought there were other problems too with piston slap, etc?

What's the difference with the new gasket that would be placed into the phase1 block? Is it just a new gasket that I will have to change in 80k or is it modified?

BTW, someone over at legacy central said that the Turbo 2.2 will plunk right into my car with very little amounts of wiring. What are some of the prices going for on the 2.2t? From what I know it's a rare block these days, and hard to find one with low miles. On the other hand the Phase 1 blocks are all over the place, for dirt cheap.

You're right about being able to rebuild parts of the engine since it will already be out of the car, that's a plus.
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Old 12-08-2003, 02:45 PM   #11
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Default Some help

Okay, The piston slap is common even in phase II block and I wouldn't say it's so much a problem just something that is subaru. Here is a quote borrowed from Wac talking about the new upgraded gasket for the DOHC: Subaru has since replaced this design with a newer one. Although I don't have a picture, I can tell you that the newer design replaces the outermost graphite layers with solid steel. The fire ring is also much more heavily reinforced with steel than before. Check out his website Here For info on headgasket replacement and such.
Joshua
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Old 12-08-2003, 05:34 PM   #12
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Cool Coool

Sounds good to me! Thanks a lot Josh for your help.
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Old 12-08-2003, 05:54 PM   #13
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Default No Problem

No problem. Keep us updated.
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Old 12-23-2003, 02:28 AM   #14
atabert
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Default swap

im doing this now, using a 2.5l phase 1 shortblock with 2.2l heads with were completly rebuilt and are basically brand new, 2.2l intake, 2.5l injectors, diamond coil. i am trying a phase 2 sohc head gasket with it modifided to the 2.2l head, now rough measurement, stock 2.2l gasket=1.8mm, 2.5l P2 gasket=07mm, so will there be any interferance?(valve to piston), this will also raise compression , right?, (premium Fuel), and i am wondering how the stock 92 2.2l ECU will handle it?
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Old 12-23-2003, 11:37 AM   #15
yebokmj
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Default 2.2 heads?

Why are you using the 2.2 heads? The flow very poorly. I guess they will be alright but are far from ideal. Are the the single exhuast port ones? The ecu will be fine with the increased compression it has been done before. The premium fuel may not be even necceery depending on what the ratio ends up being in the end. Remeber the compression ration is effected by differant heads and block combinations (when talking stock block with stock pistoins) not only the gaskets.
Joshua
This might help some though:
headgaskekts
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Old 12-24-2003, 02:10 AM   #16
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hey thanks for the response, the reason for 2.2 heads was i had them, its a dual port head which are ported with brand new valves, had machined/milled,. so it probaly will be a decent increase, i will have a bigger bore/displacement and still trying to fit in the same size combustion area, with a head gaskets that are half the size as stock, for either one, 2.5/2.2, // 2.2 stock=9.5to1//2.5 stock=9.7to1//. i also planning on using a a/f controller, and am going to just over make it breathe better,headers,air induction systems, but right this very moment, cause im not done yet, and im sure some kind of problem will pop up
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