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Old 02-06-2004, 10:41 AM   #1
BigPawr
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Default ej25 built to Turbo or ej20t?

I have a 97 impreza L and have been pondering on what to do about the power gains. I understand that turboing my 2.2L will ultimatly kill it sooner then I want, and won't allow me to run anything fantastic out of it. Open block and all that jargon. So bitting the bullet of having to eventually swap and handle the crazy task of wiring, I don't know whether to find a cheap old 2.5L and build it minutely and turbo it, or go ahead and just buy an ej20t and straight swap? Not sure on peoples oppinions on building and turboing 2.5rs motor versus a stock ej20t. Any recomendations would be helpful.
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Old 02-06-2004, 02:19 PM   #2
kgb
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With the swap you need to deal with the harness, but I don't know how close the EJ25 will be in terms of the electrical - if it's close enough, you might want to get the EJ257 (STi) shortblock and make a hybrid out of it before you swap the engine in.
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Old 02-06-2004, 03:11 PM   #3
Geoff
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The EJ25 n/a motor isn't any stronger than the EJ22 n/a, though the extra displacement and exhaust outlets will get you more power.

Another option is just turboing the EJ22.
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Old 02-09-2004, 01:27 AM   #4
BigPawr
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Quote:
[i]Another option is just turboing the EJ22. [/b]
Is that good? I want to have from 200-300hp range, and can I get that out of my stock 2.2L without blowing it up relativly quick?
I thought of just turboing it straight stock with like 5psi, and hopefully get up around 200hp, but i don't want to sacrifice the motor in the long run, well short run actually. I hear since its open deck and all this jargon that its not good to run decently high boost. Don't know if this is true, but hondas are open deck and they run like 7psi and up to 15-20 on built ones. Would I need to resleeve the block on my 2.2L along with forged pistons/rods and steel crank to handle like 10 pounds? I'm not looking for anything crazy, I just want a turbo, and want to be decently quick. And I'm willing to spend a couple G's on doing it, and without too much hassle of swapping and wiring if i can avoid it.
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Old 02-09-2004, 02:30 AM   #5
206legacy
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Im really interested in this too!! Ive just searched on turboing my n/a ej22 with ej22t or ej20t setup but found nothing. are there any threads describing this, or anything AT ALL pertaining to turboing an ej22. thanks.
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Old 02-09-2004, 11:56 AM   #6
squirrelmasta
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BigPawr if you aren't looking to spend a couple G's i would tell you to save your money and buy a W! Doing a swap or a turbo is going to run you some money.

As far as turboing, high boost on stock block bad idea. you can run 5 pounds on the stock though for a good while, maybe even the life of the car. and you can also get a EJ257 block, which is the STi block, for about $1400 i was told, which is a lower compression block, and then you can crank up the boost. again though for a good turbo set up you are looking to spend, IMO, $4000-6000.

206legacy i believe as long as you have a 95 or up, they are going to be the same and most of the RS's that are turbo out there. seeing that you ahve a 91 though, i know a few things are different, and i have no idea about the wiring in that car. Sorry i can't help you there.

for both of you i would also check out the aftermarket forum. Good luck to you both! Askem if you gottem!
-Eli
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Old 02-10-2004, 12:30 AM   #7
BigPawr
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I don't mind spending a couple G's, Power costs money right? So I'm interested in finding an ej257 STI block, or even a ej20 block from a wrx. What are some good places to find just blocks? Will just a block work for me to handle some higher boost, will it bolt to my ej22 stock head? And is that even a good idea to do? And will any rewiring need to be done? Sounds like I might as well just buy a whole short block with ecu and harness and just swap. What are my options in keeping my harness and ecu stock, and be able to swap blocks for better boost? Should I maybe look into swapping an ej22t block from an older turbo legacy onto my stock head and run like 6-10psi? And will that swap make me have to rewire anything? I know subarus are like legos, but how well do the pieces match up perfectly? Any info is greatly appreciated. Just an eager impreza owner waiting for a turbo and a lil power.
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