I want to build a 2.x engine

[ripman]

Thanks for your help Fuji.

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[ebong777]

This probably has been said, but I couldn't find it. If I were to build a 2.2 stroker and use a oem ej257 crank shaft how would that work if I'm using a phase one ej22 block?
Because if phase one blocks had thrust bearings at #3, but using a phase 2 crank which has the thrust bearing at #5
Noob question.

[Homemade WRX]

I'd change the thrust to #5.

[ebong777]

how much do 2.2/2.0 hybrid stroker cost on average?
would i be able to use my wrx ecu for it?

[biodude]

There's a lot of variables when determining cost. I can tell you what mine cost so far, but i bet you won't like it.

[ebong777]

Do you mind telling me your set up and a ball park estimate?

[biodude]

I'm in for about $5200.

I have an MPS built EJ22: +2mm rods and JE pistons to match ~ $2400
Then I bought JDM V7 heads ~$1000
Kelford 264's ~$900
and about another $900 in head work and misc parts (buckets, gaskets, ect)


if your sticking with your WRX heads you will use your ECU, but you would want to get tuned

[Nuke209]

Originally Posted by biodude

I'm in for about $5200.

I have an MPS built EJ22: +2mm rods and JE pistons to match ~ $2400
Then I bought JDM V7 heads ~$1000
Kelford 264's ~$900
and about another $900 in head work and misc parts (buckets, gaskets, ect)

if your sticking with your WRX heads you will use your ECU, but you would want to get tuned

Thats really good compare to what others have paid

U know who u are LOL

[ebong777]

Thanks bio.
I was thinking about buying a used ej22t short block for about- $500
ej205 heads- $0
ej257 crank- $350
pistons/rods- $1000??
gaskets,machine work, misc- $1000
I know I have to get the thrust bearing relocated to #5 and mill my heads to 96.9mm iirc.
any other major parts I'm missing?

[biodude]

Originally Posted by Nuke209

Thats really good compare to what others have paid

U know who u are LOL

first off, group buys rock!!

and

if you add in all the little extras, like gauges, screwups and a bigger turbo of there's about an additional grand or so spent. But he did only asked about the engine

[FuJi K]

these 2.1 drives nice. more torque than my 2.2. it's like a mini 2.5.

[FuJi K]

I'll grab a few more pictures of these phase 1/phase 2 blocks as i have a few on hand at the moment. I'll get some bell housing bolt patterns

[Soarer]

Hey Fuji,
Any input on building a hybrid with ej255 shortblock out of a 2005 legacy gt with ej205 heads from a 2002 wrx? Any machine work needed? What head gaskets would you run?
Cheers!

[FuJi K]

Originally Posted by Soarer

Hey Fuji,
Any input on building a hybrid with ej255 shortblock out of a 2005 legacy gt with ej205 heads from a 2002 wrx? Any machine work needed? What head gaskets would you run?
Cheers!

flared out chambers, minimal decking, i usually ask .002" and run oem 257 '04-06 STi hg.

[SpamMansXe]

Subscribed for hours of reading and learning!

[Soarer]

Originally Posted by FuJi K

flared out chambers, minimal decking, i usually ask .002" and run oem 257 '04-06 STi hg.

Do you have an estimate on what compression ratio I'd end up with on this build after machine work?

[kakarot09]

Originally Posted by Soarer

Do you have an estimate on what compression ratio I'd end up with on this build after machine work?

Well you said you're building the shortblock which usually means at a minimum forged pistons. So you'd need to say what pistons to even get a ball park figure. That ball park figure could also be pretty far off depending on what the machining is like on the chambers. If you flare them out to fit the cylinders you'd have to measure them to know the chamber volume.

[Soarer]

Originally Posted by kakarot09

Well you said you're building the shortblock which usually means at a minimum forged pistons. So you'd need to say what pistons to even get a ball park figure. That ball park figure could also be pretty far off depending on what the machining is like on the chambers. If you flare them out to fit the cylinders you'd have to measure them to know the chamber volume.

That question was directed to Fuji K. As I stated in prior post, I'm running an ej255 short block so, no forged pistons.

[kakarot09]

I realize that but most people do not put stock pistons back in so the assumption would be that you were changing pistons in which case Fuji would need to know the same info. The block out of an 05 LGT uses the same pistons and crank as an sti which with stock 02wrx heads puts your compression ratio ~8.85:1. After machining the heads I'm sure Fuji can give a better estimate but I would say 8.5-8.6:1.

[Soarer]

Originally Posted by kakarot09

I realize that but most people do not put stock pistons back in so the assumption would be that you were changing pistons in which case Fuji would need to know the same info. The block out of an 05 LGT uses the same pistons and crank as an sti which with stock 02wrx heads puts your compression ratio ~8.85:1. After machining the heads I'm sure Fuji can give a better estimate but I would say 8.5-8.6:1.

Kakarot09, I appreciate your willingness to try to help out here but I think you're just muddying the waters of this thread. If you read the prior few posts, you'll see that Fuji K has all the pertinent info to answer the question. Also, if you read the prior pages of this thread or others on the differences between the ej255 and ej257 short blocks, you'll see that they use the same case halves and crank but different pistons. The ej255 has a lower compression ratio than the ej257. Not trying to call you out or anything, just trying to keep this thread on track with no misinformation. Let's let the guru Fuji K respond to the compression question, please. Thanks.

[kakarot09]

Originally Posted by Soarer

Kakarot09, I appreciate your willingness to try to help out here but I think you're just muddying the waters of this thread. If you read the prior few posts, you'll see that Fuji K has all the pertinent info to answer the question. Also, if you read the prior pages of this thread or others on the differences between the ej255 and ej257 short blocks, you'll see that they use the same case halves and crank but different pistons. The ej255 has a lower compression ratio than the ej257. Not trying to call you out or anything, just trying to keep this thread on track with no misinformation. Let's let the guru Fuji K respond to the compression question, please. Thanks.

I'll be happy to do that, and I realize that Fuji is the one people ask questions to because he is pretty respected on the boards, however to help prevent muddying the waters on the off chance that he didn't know the answer or that he misreads your post or makes a mistake etc, it is always beneficial to have more than one person answer the question to double check. It's the reason scientific journals are put up for peer review. Mistakes happen. For info in the future the EJ255 does not cover just one engine configuration. If you look at these charts





You'll see that the Sti and the 05 LGT do in fact share the same piston part number, and thus dimensions, and they share the same crank with the same stroke. That is the only information you need from the shortblock for the calculation.

I'm sure Fuji will chime in for you though He's a pretty helpful guy around here.

[FuJi K]

Originally Posted by Soarer

Do you have an estimate on what compression ratio I'd end up with on this build after machine work?

it comes out to around 8.6-8.7cr.
The 05/06 LGT runs the same longblock as the same year STi. The '07+ LGT runs the same as '06+ WRX/FXT with D25 heads.

[Soarer]

Originally Posted by FuJi K

it comes out to around 8.6-8.7cr.
The 05/06 LGT runs the same longblock as the same year STi. The '07+ LGT runs the same as '06+ WRX/FXT with D25 heads.

Thanks very much Fuji K.

Kakarot09, I stand corrected. Thanks for the helpful info and putting up those part numbers. That is incredibly helpful! Where did you find those charts?

[kakarot09]

No problem, I think the charts were initially posted by Jeff Sponaugle? I'm not positive, but they've been floating around for quite a while now. I wish he posted regularly still. He always had good info.

[Aczwild]

Great thread, just spun a bearing in my '98 RS (Phase 1 EJ25) and will be swapping a EJ22T (Phase 1) in. Thank you very much for the time you put into this!