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Old 10-31-2004, 10:52 PM   #1
mybluesubi
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Default replace 2.2 with a 2.5 with little or no mods?

I want to go with a bigger engine but don't wanna havta change a lot of wiring or other things. Which 2.5L engines will have "plug and play" capabilities with a EJ22 and are they single port or dual port exhaust? By the way I have a 97 OBS SOHC EJ22. I'm not looking for a lot more power, just enough to make it over long climbs on the interstate. I live at 6700ft and I can't climp more than about 300 ft/min at 80 mph and dumping it in 4th isn't an option being that it runs about 5k on the tach at 80. thanx
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Old 10-31-2004, 10:55 PM   #2
ImprezaRSfan!
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if ur going to do a motor swap, u might as well bite the bullet and do the wiring and swap a wrx engine in, you will be so much happier. Even keeping it stock. I dont know if u will be happy with the results of going from 2.2 to a 2.5rs engine, its a lot of work to swap it and the power is only marginaly better.
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Old 11-01-2004, 12:00 AM   #3
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boost
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Old 11-01-2004, 12:08 AM   #4
jamesfacts
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FI motors perform far better at altitude than NA ones.
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Old 11-01-2004, 09:48 AM   #5
mybluesubi
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guess I'll start the search for an 20T
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Old 11-01-2004, 11:38 AM   #6
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um, I think 97 OBS's are DOHC
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Old 11-01-2004, 07:03 PM   #7
mybluesubi
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97 obs is a sohc 16v. Just outta curiosity here, how much power gain is there by adding aftermarket cams and where can I find some? I've looked all over but can't find any for the EJ22.
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Old 11-01-2004, 10:38 PM   #8
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Go with a WRX motor, ecu and splice the loom.

This is not a little weekend project. Even though you may really hate yourself in the middle of it, you will be happy in the end.
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Old 11-02-2004, 09:49 AM   #9
mybluesubi
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my main concern here is that my car is a daily driver. I know I can do an engine swap in a weekend or a day if pushed to (a long day). I'm probably pushin about 160 HP with the mods I've done and I wouldn't mind having about 15-20 more.
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Old 11-02-2004, 09:52 AM   #10
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i would never swap to the NA 2.5... if your going to swap either turbo swap or build a more powerful 2.2 NA motor
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Old 11-02-2004, 02:19 PM   #11
mybluesubi
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what kinda things would you recommend to pull some horsies outta my engine? keeping in mind that I don't have all the money in the world. I've already added cold air intake and gutted the cats.
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Old 11-02-2004, 02:45 PM   #12
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cams, headwork, headers... http://www.techworkseng.com/
or swap for turbo...
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Old 11-03-2004, 07:12 AM   #13
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If you swap a DOHC 2.5 in like I did there is no wiring with significant gains. Do a search this has been discussed before and you can read up on it. A DOHC engine can be found pretty cheap as well, must cheaper and easier than any WRX swap.
Joshua
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Old 11-03-2004, 08:54 AM   #14
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The 2.5 is significantly faster. You can feel it right away. There is also more parts available for it like cams and headers. The hard part would be sourcing a good DOHC 2.5 that doesn't have piston slap or a borked block from a failed HG.
The plug and play ones are 97-99 from a Legacy, 98 Forester and 98 RS. The 96 Legacy motor is not so great, stay away.
By the way, what makes you think you are getting 160hp from your 2.2l? An intake and gutted cat might be good for 5 hp. I seriously doubt there is more than 10hp to be gained unless you do cams and head work.
There was a post on cams for the 2.2l on the N/A forum yesterday. But by the time you add the cost for new HG and various, you would be better off going with the 2.5l.
I am seriously considering putting a 2.5l into my impreza. It will allow me to stay in a lower autox class and with mods you can get to 190hp reliably. Also I would prefer the low end torque compared to the EJ20.
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Old 11-03-2004, 09:01 AM   #15
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Also going with the turbo swap puts you into other parts requirements like headers, front sway bar, cross member, ecu, steering rack lines, fuel pump, pedal box, hydrolic clutch, aftermarket clutch, tranny after awhile, etc. It is a much bigger deal.
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Old 11-03-2004, 08:23 PM   #16
mybluesubi
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ok maybe it isn't 160 hp but it was a significant increase in power and gas mileage I might add. I'll start lookin for a 2.5. am I gonna need the ECU or any wiring or anything else to put it in?
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Old 11-04-2004, 12:29 AM   #17
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You don't need to convert the stock tranny. I'm using the stock L tranny in my swap. You may chew through one or two thou.
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Old 11-04-2004, 09:38 AM   #18
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I would like to eventually get a new tranny and rear diff just cause of the change in gearing.
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Old 11-04-2004, 12:59 PM   #19
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you will need the ECU and the potential is definately there for wiring modifications.
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Old 11-04-2004, 12:59 PM   #20
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my buddy and i swapped a 2.5 into his '99 2.2l with NO modifications needed, and like the others said it made a big difference. not only, you've got a better platform to work with than trying to mod the 2.2. since you said this is your daily driver, i'd recommend it over going FI. you can use the existing intake manifold, and computer, (we did it and it works fine) just need a header or factory exhaust manifold for the 2.5. should take no more than 6-8 hours with two people on it.
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Old 11-12-2004, 08:19 PM   #21
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The 2.2 ecm will control the 2.5 as long as it's a sohc 2.5. I have a buddy that did it and it works great. He changed out the injectors with some other ( don't have a clue which ones) and the car runs hard.
You can easily get over 200 hp from a 2.5 engine and 250 isn't that far away. True a forced induction car will do better at higher elvation, but that is more work.
You could also get a turbo legacy engine. Those are 2.2 sohc and your ecm will control it just fine. I have one if you want to buy it and i'm close too.
Pm if you want it.
B
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Old 11-12-2004, 11:21 PM   #22
mafiamotorsports
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How many miles are on that 2.2 I have a 96 obs with a 2.2 I would like to replace the engine is smoking pretty badly.How much do you want and will you ship?
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Old 11-14-2004, 09:21 PM   #23
mybluesubi
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the thing with my engine is about 20k ago I spun a bearing so I just replaced the short block with one that had about 40k on it. the heads are from the original engine. (243k miles on them) when I did the swap, the cams valves and rockers were in great shape and I'm sure they still are. I only run chevron premium gas and injector cleaner every third tank to keep everything running good and clean. The engine runs great. If I were to sell it I know I couldn't ask much for it though. If someone can make me a good offer on a good EJ25 sohc I'll sell the one I have now. My car is a daily driver so I would have to make the swap in a weekend. If you have any other questions about it feel free to ask.
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Old 01-10-2011, 03:03 PM   #24
Suby<3777
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I know this is a pretty old thread but I am looking to do something similar. I want to swap a 2.5L from a 97 Legacy Outback into my 2.2L 99 Impreza L. So it sounds like from what was said above in this thread this would be a plug and play swap, correct? Couple questions just to make sure

1: Would I have to swap the engine computer for the 2.5L ECU?
2: Any sensors or wiring I would have to change?
3: Would my 2.2L tranny hold up ok to the 2.5L engine?(keep in mind I do race autocross and drag once in a while, but not all the time or super hard)
4: Would I need a clutch & flywheel for a 2.5L?
5: The 97 2.5L has an EGR, can I delete it without any complications?
6: Anything else I need to know about this swap?

Please answer any and all questions ASAP. Thanks for your help. Dan
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Old 01-10-2011, 03:53 PM   #25
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You're going to want a 99-01 SOHC 2.5 to make your swap plug and play.
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