neoshi

Isn't the 257 the STi shortblock? Doesn't whatsherface from Oregon wife of Bobby have it too? ForesterSTI?

Yeah. She does. Maybe you could ask her or Bobby.

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05 XS
WTB 4.44 Rear Diff LSD

 

fourortwowheels

the ej257 is the sti SB. the ej255 is considered the 'world motor' and is found in all 06+ turbo models(except stis).

ej257 > ej255.

BAC5.2

If you are swapping rods and pistons, there is no effective difference.

BUT, what is involved is full machine shop workover. The block needs to be split, line-bored, honed to piston spec, all new bearings, properly assembled and put back together. Stock Subaru rod and journal bearings are weaksauce. It's not a "pop em in" ordeal. A motor build is not something that should be bargain basemented on. It should be done right, done once.

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The Aggressive™
09 SWP Outback 2.5XT 5MT
RIP Edwin

toddlamp

But what is the physical difference?

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06XT MT CGM Blouch TD05-18g 8cm equipped
Starting to save for a 6spd swap.

neoshi

None, really.

I'm sure you could google it and find out that it's practically the same, aside from some paint. Haha

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05 XS
WTB 4.44 Rear Diff LSD

BAC5.2

The crank is the same, as are all of the bearings. The case IS a slightly different aluminum, however.

Dinemsionally, they are identical.

__________________
The Aggressive™
09 SWP Outback 2.5XT 5MT
RIP Edwin

toddlamp

So in preparation for going with something a bit bigger turbo wise i'm thinking about get some new injectors installed. I would likely go with an 18g or maybe a 20g but that would probably be the biggest.

1. I was thinking that 750cc's would do it.
2. Are there any OTS tunes suitable for those injectors?

__________________
06XT MT CGM Blouch TD05-18g 8cm equipped
Starting to save for a 6spd swap.