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Old 09-08-2003, 08:32 PM   #1
kgb
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Question EJ257 shortblock swap + turbo onto a GME using the SOHC heads

Is this worthwhile if there isn't a good experience shop locally dealing with the harness of swapping a JDM/USDM EJ20?

Ultimately I want to keep the displacement but it seems that the EJ257 shortblock can be had cheaply, and the shortblock should have next to none electronics on it. The labour would still be great, but it's more mechanical which should requires less expertise than mucking with the harness. Is this a viable route compared to swapping a whole engine with different harness, or bolting on a turbo kit to the EJ251 high compression et al? I'm pretty much in strictly planning stage but I know I wanted turbo, and I have no access to a shop locally that have shown me confidence in letting them swapping a EJ20 at a decent price.

Thanks.
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Old 09-09-2003, 01:14 AM   #2
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I dont know about rs heads but wrx heads will have "high CR"
And I dont know if anyone has tried it yet...

An ej22T can be had for just as cheep and its good for 15-20lbs on stock internals, and it has a stronger deck then the ej257.

http://forums.nasioc.com/forums/show...hreadid=409100

On top of this if you dont trust a shop to do a full swap, a hybrid swap could get just as messy, why would you still use them?
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Old 09-09-2003, 02:17 AM   #3
kgb
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Actually, it's more that I have yet to seen expertise locally in handling a merged harness, where as swapping the EJ257 in gives me displacement, and rumour has it that CR will be around 8.48:1 with the SOHC heads. It's debatable whether you can still get a new EJ22T closed deck block, and it has a CR of around 7.7:1 with the SOHC heads.
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Old 09-09-2003, 12:05 PM   #4
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first i appluad your use of GME (you studied YAY!)

at this point ej257 blocks are hard to come by low stock in the wearhouses this will eventualy change tho
also dont count out a ej255 block as they are the SAME as the 257s

afaik ej22t blocks are relitivly easy to come by and about the same price as the 257/255 ~1400
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Old 09-09-2003, 01:21 PM   #5
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Quote:
Originally posted by Jaxx
first i appluad your use of GME (you studied YAY!)

at this point ej257 blocks are hard to come by low stock in the wearhouses this will eventualy change tho
also dont count out a ej255 block as they are the SAME as the 257s

afaik ej22t blocks are relitivly easy to come by and about the same price as the 257/255 ~1400

I woldnt call them the same.... different internals and reinforced deck.
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Old 09-09-2003, 01:28 PM   #6
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Haha, damn right I studied, but I couldn't find much in this direction...

I thought about EJ22T brand new, but there is still too much uncertainty as to what is forged and what is not (that might have been discussed before but I couldn't seem to locate the source confirming anything). I read somewhere that with the SOHC heads on the EJ22T I get too low of a CR (something like 7.7). I like the displacement, and since it's something down the road, I don't mind the wait knowing that it's very likely to be widely available (although it might require VIN verification on the STi part vs the Forrester part)

AFAIK, EJ255 and EJ257 differs only in the valvetrain, so for a shortblock they should be the same? That was what I read in the other threads I have found.
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Old 09-09-2003, 03:24 PM   #7
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Quote:
Originally posted by kgb
Haha, damn right I studied, but I couldn't find much in this direction...

I thought about EJ22T brand new, but there is still too much uncertainty as to what is forged and what is not (that might have been discussed before but I couldn't seem to locate the source confirming anything). I read somewhere that with the SOHC heads on the EJ22T I get too low of a CR (something like 7.7). I like the displacement, and since it's something down the road, I don't mind the wait knowing that it's very likely to be widely available (although it might require VIN verification on the STi part vs the Forrester part)

AFAIK, EJ255 and EJ257 differs only in the valvetrain, so for a shortblock they should be the same? That was what I read in the other threads I have found.
the ej255 being the new forester motor?? I got confused and thought it was the old rs motor... thats ej251 right??

there is no difference between the forester turbo motor and the sti 2.5. From what I know they even have the part numbers..
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Old 09-09-2003, 05:10 PM   #8
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Question

Yep, EJ251 is what I have in my car right now, and for just shortblock, it's the same part for both EJ255 or EJ257. Cool - just wondering if anybody is venturing this route of using the EJ255/EJ257 shortblock, instead of a complete swap, doing a bolt on setup on top of that.
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Old 09-11-2003, 12:51 AM   #9
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I think that's what I'm going to do in my RS. EJ255 short block and SOHC heads. I like higher compression and alittle lower boost versus high boost and low compression.
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