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Old 10-23-2000, 02:16 AM   #1
Scooby Newbie
Member#: 2167
Join Date: Aug 2000
Location: Daytona Beach, FL USA
Question Unusual Question?

Ok heres the deal, I am fairly new to the board and want to ask a fairly serious question and I haven't seen much on this.

Most of us don't like the new style of the new WRX coming to the states. So after careful thought, I decided to get a MY01 BRP 2.5, Now for the question: Do you think it will be possible to swap the motor and tranny into a newer 2.5 without any major mods to the frame of the vehicle? I have been in the motorcycle scene for a long time, and I know that you can take a 2000 CBR 900 motor and drop it into a CBR 600 F-F4 without any mods at all except exhaust. Hell even the mounting bolts match up perfectly. So maybe to early to ask this but do you think Subaru is smart enough to make the new WRX motor and drive train interchangeable with the old ones? WRX's or 2.5's. I know a EJ20 supposedly will fit into a 2.5 RS currently.
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Old 10-23-2000, 04:54 AM   #2
Scooby Newbie
Member#: 64
Join Date: Jul 1999
Location: Lansing, MI
1999 Impreza 2.5RS
Rally Blue Pearl


While I obviously haven't seen the new car just yet (I don't secretly work for Subaru R&D or anything), I would hazard to guess that it will. The "new" engine isn't really all that new, and thus I suspect the engine mounts and the like will be both forward and backward compatible. Now as to what other bits (A/C, alternator, etc.) might not be quite in the right position for swapping, we'll really just have to wait and see.
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Old 10-23-2000, 07:52 AM   #3
Scooby Specialist
Member#: 102
Join Date: Jul 1999
Location: The meeting place

yeah just put in a new wiring harness, a new stronger tranny and a WRX spec diff, you should be halfway there. Why I say half way? CUs you're missing the upgraded brakes, the stiffer chassis, aluminium control arms etc...
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Old 10-23-2000, 09:41 AM   #4

Member#: 922
Join Date: Feb 2000
Chapter/Region: MWSOC
Location: Schaumburg, IL
16 WRX (white)
04 FXT (red)


With all the time they put into redesigning the body of the car, I highly doubt they made a new block and transmission and drivetrain as well. I'm sure they'll be perfectly swappable.
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Old 10-23-2000, 09:58 AM   #5
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Join Date: May 2000
Location: Lakewood, CO

Talk to Joe at JC Sports, I talked to him for a bit about the same subject at the drags this weekend, and he said it's do-able. Course we didn't talk price...
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Old 10-24-2000, 02:24 AM   #6
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Member#: 2236
Join Date: Aug 2000
Location: Red Sox Nation w/ y2k4door
2000 Audi S4
silver/rally dirt brown


For the money that you would spend on the transfer, you could keep your stock engine and put on a nice turbo that is already made for the current engine. I think that you would avoid a lot of problems this way anyway. But from the stories that I have heard, you might want to look at getting the new tranny if you do the above. Besides if you do it this way you have a referance of sorts. A lot of people have turbos on the current car. and over time all the bugs have been worked out. so you know it works and what to expect. If you do the swap thing, all kinds of problems could pop up, and there is no one to turn to, because you would be the first to do it.
Just an opinion.
BTW I did the same thing; saw the 'new' car, and bought a 01'
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Old 10-25-2000, 01:12 AM   #7
out back
Member#: 1964
Join Date: Jul 2000
Chapter/Region: RMIC
Location: 84XXX


Subaru has used the same basic engine series since the 89 Legacy. The 1.8, 2.0, 2.2, 2.5 and 3.3 all have very common roots to that engine.

That being said, the 2.0turbo from any year Impreza will basically bolt right in.
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Old 10-25-2000, 01:22 AM   #8
Scooby Specialist
Member#: 1997
Join Date: Jul 2000
Chapter/Region: MWSOC
Location: Des Plaines, IL
2006 Acura TL 6spd
STMGM6 alumni


Engineering question: Is it faster/cheaper to make the engine just bolt up rather than redesign the engine/tranny? If yes, its probably that way.
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