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View Poll Results: Which Engine Would You Get?

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  • ej205

    4 21.05%
  • ej207

    5 26.32%
  • ej257

    14 73.68%
  • Other Engine (including boobs)

    6 31.58%
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This is a discussion on I Need Opinions within the Everyday Impreza Talk forums, part of the Community - Meet other Enthusiasts category; Originally Posted by zax If you can find an EJ207 case, I'd go with that... the EJ207 has the semi-closed ...

  1. #16
    UnBanned Sinister's Avatar
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    Quote Originally Posted by zax View Post
    If you can find an EJ207 case, I'd go with that... the EJ207 has the semi-closed deck design (not that this would truly matter at power levels < 500whp) and better oil journals/thrust bearing design.
    The EJ25 block (both 255 and 257) also have semi closed deck blocks. And apparently the bearings aren't an issue as crawford uses OEM bearings in some models of their upgraded engines. When I build my engine... I will use OEM STi bearings, and OEM STi rings.
    Last edited by Sinister; 02-13-2012 at 10:36 PM.
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  3. #17
    Moderator T0rque's Avatar
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    Quote Originally Posted by Sinister View Post
    The EJ25 block (both 255 and 257) also have semi closed deck blocks. And apparently the bearings aren't an issue as crawford uses OEM bearings in some models of their upgraded engines.
    Yes


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  4. #18
    Moderator T0rque's Avatar
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    Quote Originally Posted by Sinister View Post
    both have forged rods, and hypercast pistons (hypereutectic)
    Wasnt positive about the rods. I didnt think the pistons were different.


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  5. #19
    Good news, everyone! xxxxxxxAnub1s's Avatar
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    I vote hybrid build.

    And boobies.
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  6. #20
    Master Baiter EJ257's Avatar
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    If you go the hybrid route, you should have the heads worked on. EQTuning offers this service:
    Exciting New Head Option for EJ205/EJ257 Hybrid Builds! - Subaru Impreza WRX STI Forums: IWSTI.com
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  7. #21
    zax
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    Quote Originally Posted by Sinister View Post
    The EJ25 block (both 255 and 257) also have semi closed deck blocks. And apparently the bearings aren't an issue as crawford uses OEM bearings in some models of their upgraded engines. When I build my engine... I will use OEM STi bearings, and OEM STi rings.
    I didn't say that they didn't have semi-closed decks. I was talking specifically about the 2.1L stroker build, and that requires a 2.0L block. I was only referring to the EJ207 block over the EJ205 block
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  8. #22
    ClubWRX.net Vendor rexxx0486's Avatar
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    just for ****s and giggles I checked my parts dept. and we sell the ej205 shortblock new for 1875. btw just curious, what kind of hp will the automatic support?

  9. #23
    The Fruit mangostick's Avatar
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    What I'd do, if I were to go with the auto... Now this also depends on finding one intact but I'd try to find a wrecked 08 2.5gt (ej255 w td04 turbo coupled to auto trans) and pull the 2.5l engine/trans/management/harnesses out of that and drop it into your project. It would be a bit of work but a really solid daily and lots of potential to build later on.

    My reasoning is simple. Auto's need torque, 2.5 w td04 turbo makes good torque and the turbo spools right effin now. Quick spool and a little more displacement to begin with will take the dull laggy feeling out of the auto.

    hard part: finding a wrecked 2.5gt.
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  10. #24
    Resident meany-rator 06wrx4me's Avatar
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    Honestly it doesn't matter EJ255,EJ257,EJ205, hybrid (EJ20x heads on an EJ25x short block) all are great options, all you will be happy with, some will cost more than others. If you do go the EJ25x route the increase in torque will definitely necessitate a tranny rebuild.

    Lets take a look:

    EJ205:

    Pros

    *Direct replacement
    *stock ecu will work no need for a tune.
    *Might get away without a tranny rebuild for a while
    *no need to immediately upgrade fuel system
    *great daily driveability, proven reliability
    *potentially cheapest
    *can use some existing engine parts
    * stock wiring harness will work

    cons


    *Not as strong a platform to build to the moon
    *does not make as much torque as the EJ25x

    Hybrid:

    Pros

    * Can build a ton of power
    * can use the stock EJ205 ecu to tune
    * more torque out of the box
    * stock wiring harness will work

    cons

    * requires immediate tuning
    * requires immediate fuel upgrades
    * requires a set of ej20x heads and machining
    * tgv deletes good idea
    * sacrificed longevity and reliability
    * has to be built can't be bought off the shelf
    * not cheap

    EJ255

    pros

    * can be bought off the shelf
    * makes lots of torque
    * reliability and longevity in stock form
    * good Daily driving

    cons

    * not a bolt in swap
    * need new harness
    * need new ecu
    * need new fuel system
    * build that tranny
    * might need new tranny harness
    * drive by wire, need to change out gas pedal, TB, etc
    * new engine harness needed

    EJ257

    pros

    * can be bought off the shelf
    * makes lots of torque
    * reliability and longevity in stock form
    * good Daily driving
    * make a ton of power

    cons

    * not a bolt in swap
    * need new harness
    * need new ecu
    * need new fuel system
    * build that tranny
    * might need new tranny harness
    * never came with an AT hooked to it factory
    * drive by wire, need to change out gas pedal, TB, etc
    * new engine harness needed


    Now, if you are just going to use it as a DD and not looking for power over 300whp, and want to stick with the AT, I'd stick with the EJ205. It is the easiest to do.

    I'd buy a td05h-16G with EWG, a bigger top mount, EBCS, Walboro, injectors, up pipe, down pipe, grimmspeed ported/coated headers, rebuild the tranny, higher stall converter, tactrix cable, new axles, new driveline.

    For engine availability, don't be scared of calling dealers and having a stock one shipped. I mean your original engine went 260,000 miles. You can also call tuners and see what they have for stock.





    Quote Originally Posted by EJ257 View Post
    If you go the hybrid route, you should have the heads worked on. EQTuning offers this service:
    Exciting New Head Option for EJ205/EJ257 Hybrid Builds! - Subaru Impreza WRX STI Forums: IWSTI.com
    Not a fan of EQ. They are semi local and don't have a great rep.
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  11. #25
    Pro Manscaper Mikie13's Avatar
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    I thought the 4EAT was a very strong transmission that relatively ever broke? Or is the issue here that its just already old with a lot of miles through it? The torque increase from an EJ25x wouldn't be THAT much in the grand scheme of things unless going on through Stage 2 and further...

    And just a generalized question...if you did put in a V7 or similar JDM STI BLOCK only, but kept the stock heads and just machined them for optimum fit...does the ECU/harness still need to get swapped as well?
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  12. #26
    Administrator RayfieldsWRX's Avatar
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    Quote Originally Posted by 06wrx4me View Post
    * sacrificed longevity and reliability
    Is there a consensus that the hybrid motors won't last? We do seem to have a number of folks around that have blown there's up...but we're talking STI_KLR and Justin, here, so I'm thinking that they'd break whatever you put in there.

    I was hoping that mine would last another 2 years for me, anyway...long enough to offload it onto some poor, unsuspecting high school kid.
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  13. #27
    The Fruit mangostick's Avatar
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    longevity is in the tune.. conservatively tuned any engine will last as long as its built correctly.
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  14. #28
    Pro Manscaper Mikie13's Avatar
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    Quote Originally Posted by RayfieldsWRX View Post
    but we're talking STI_KLR and Justin, here, so I'm thinking that they'd break whatever you put in there.
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  15. #29
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    Quote Originally Posted by RayfieldsWRX View Post
    Is there a consensus that the hybrid motors won't last? We do seem to have a number of folks around that have blown there's up...but we're talking STI_KLR and Justin, here, so I'm thinking that they'd break whatever you put in there.

    I was hoping that mine would last another 2 years for me, anyway...long enough to offload it onto some poor, unsuspecting high school kid.
    How long have you had the hybrid Ray? I'm considering this route at some point in the future, but considering the investment could be put toward a down payment on a new STI, the hybrid would have to be worth it.
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  16. #30
    Pro Manscaper Mikie13's Avatar
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    Quote Originally Posted by Rambo View Post
    How long have you had the hybrid Ray? I'm considering this route at some point in the future, but considering the investment could be put toward a down payment on a new STI, the hybrid would have to be worth it.
    I think Shawn hit it on the head with the tune...as long as it's built properly, and your heads are machined and worked properly to fit the block, the tune has to be absolutely perfect, and more or less on the conservative side.
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