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Old 01-23-2013, 04:08 PM   #1
Joshsmiley55
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Join Date: Oct 2011
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Default 2.2l block with 2.5 dohc heads

Hi everyone


So just like everyone looking for a quick solution for the random engine parts I have laying around, I'm looking to do the 2.2 block out of a 97 legacy with 2.5l dohc heads out of a 99 legacy outback. With a td04 turbo setup.
All in a 95 impreza coupe.
I'm looking for some comments, ideas, negatives, positives , compression ratios, and any ideas to make this a better engine.
Thanks everyone love hearing what everyone has to say.
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Old 01-26-2013, 12:24 AM   #2
BlkBumperBandit
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If u look in the legacy section there is a member here that has already documented swapping 2.5 heads onto the ej22e. Think his name is ej22dohc. And he has video of the swap working. Also a td04 is too small for the bigger 2 .2 l motor. You might want to look into something bigger like the vf39 or the evo III td05 . Other than that you should find the rest of your answers through this site and rs25.com. Happy modding
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Old 01-31-2013, 01:49 PM   #3
RedGauge
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TD04 is not to small. Especially if you are keeping stock internals. As far as I am aware a 2.5 third gen wrx's still use a td04. Reguardless... There a many factors that determine turbo size. One cannot merely state that it will not work with absolutely no facts to conclude such a firm answer.

If it is a 97 2.2 block you are in alot better shape than a phase 2 ej22e with compression ratio and over piston strength/design.

I would definitely check out ej22dohc. He's on Legacygt.com too.

ej22t pistons would be a good upgrade. With probelm EM and better internals you could utilize a bigger turbo like a vf39. It all depends how big you are wanting to go. There are a million options.
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Old 01-31-2013, 02:15 PM   #4
Joshsmiley55
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I'm actually talking to that that's for the reference. And I do have ej22t pistons. But I think it will lower the compression too much with the 2.5 heads on the 2.2 block... And as far as the turbo goes, I'm sticking with the td04. But I still need to learn to tap the turbo lines. And I'm inking about getting the 2.5dohc cams grinded by delta. But idk how that will effect the compression ratio. So I figured I'd start with figuring out what pistons I'm going with
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Old 01-31-2013, 06:32 PM   #5
dangerousatom
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Cams will not make much of a difference unless your looking into a big turbo.

What are yo planing on for engine management?

here is my old Legacy SS build thread it may help a little:

http://forums.nasioc.com/forums/show...light=crap+box
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Old 01-31-2013, 07:42 PM   #6
Joshsmiley55
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I'm using an ej22t ecu I picked up.
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Old 01-31-2013, 07:43 PM   #7
Joshsmiley55
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And that's a sweet ride lol
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Old 02-01-2013, 01:28 PM   #8
RedGauge
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My experience........................................ ...................

I did not feel a difference with phase 2 10:1 ej22e pistons vs. ej22t that's rumored anywhere from 7.5:1 to in the 8's somewhere. Go na and you will have a slug

I had a vf11 with phase 2 pistons @10 psi then rebuilt and put on a td04 13t with ej22t pistons @10psi.
All I noticed was a 200-300rpm spool difference.
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