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Old 03-24-2009, 07:46 PM   #1
CHEWY911
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Default Built motor, or new OEM short block?

I spun a bearing in my 2004 WRX (bad tune) and was wondering if you guys think it's worth it for me to rebuild my EJ205 motor, or just buy a new EJ205 shortblock from Subaru? I have an 18G and the supporting mods, looking for 300whp. I don't want to go hybrid, and I keep hearing stories about builds going bad. I know the EJ205 is a fairly stout motor with a good tune - is it worth the price to build my current Ej205 (forged rods, pistons) at these power levels?
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Old 03-24-2009, 10:39 PM   #2
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why not go hybrid? for the price you are gonna spend on rebuilding your 2.0 you could have a strong 2.5. it will also allow some free hp and trq
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Old 03-25-2009, 12:47 AM   #3
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Originally Posted by Got Boost? View Post
why not go hybrid? for the price you are gonna spend on rebuilding your 2.0 you could have a strong 2.5. it will also allow some free hp and trq
why not 2.0? they are fairly well when built right especially for his power goals. also hybrids tend to be problematic..
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Old 03-25-2009, 12:50 AM   #4
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whoops, to answer your question OP, rods aren't needed at that power level. IMO I wouldn't build the motor at that power level.. but then again you never know in the future if you wanted more power, now would be best time to upgrade since motor's out.
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Old 03-25-2009, 01:27 PM   #5
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Originally Posted by toutanje View Post
whoops, to answer your question OP, rods aren't needed at that power level. IMO I wouldn't build the motor at that power level.. but then again you never know in the future if you wanted more power, now would be best time to upgrade since motor's out.
So at the 300whp you guys think the 2.0 shortblock would be sufficiently reliable (with a good tune)? I don't plan on upgrading any farther on this particular car.

As far as the hybrid, it seems that the ringlands are problematic, and I'd rather have a block matched to the heads.

thanks guys!
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Old 03-25-2009, 02:36 PM   #6
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2.12 stroker and have some more tq/reduced lag and stronger/safer bottom end?...
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Old 03-25-2009, 03:23 PM   #7
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Quote:
Originally Posted by CHEWY911 View Post
So at the 300whp you guys think the 2.0 shortblock would be sufficiently reliable (with a good tune)? I don't plan on upgrading any farther on this particular car.

As far as the hybrid, it seems that the ringlands are problematic, and I'd rather have a block matched to the heads.

thanks guys!

STI shortblock + a good tune. Stock STi ringlands are "weak" but when they fail its because something is wrong. You should be good. I would not spend money rebuilding the 2.0.
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Old 03-25-2009, 10:15 PM   #8
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300whp with an 18G? I'd use your existing stuff, add forged pistons, and have fun! Maybe take Homemade_WRX suggestion and use a STI crank.

I like the 2.0L. It has a charming powerband and is economical on fuel and saves transmissions. A bunch of 2.5L WRXs I have tuned have broken gears from the added torque. Not so much on the 2.0L. And they will run right next to many 2.5s.
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Old 03-25-2009, 10:27 PM   #9
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If your on a budget just put in some forged pistons and maybe do a little porting on the heads if you can.
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Old 03-25-2009, 10:40 PM   #10
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a new block will cost you the same as building your current one so personally id rather have forged pistons and rods for the money.
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Old 03-25-2009, 10:41 PM   #11
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CP pistons
STi rods
ACL race bearings
NEW WRX crank (double cross drilled)

good to go!
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Old 03-26-2009, 05:22 PM   #12
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Quote:
Originally Posted by AWDWRXLOVER View Post
a new block will cost you the same as building your current one so personally id rather have forged pistons and rods for the money.

says the guy who is ditching the 2.0 for the 2.5
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Old 03-26-2009, 11:35 PM   #13
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Quote:
Originally Posted by AWDWRXLOVER View Post
a new block will cost you the same as building your current one so personally id rather have forged pistons and rods for the money.
It's about another $800 to build a motor versus buying a new oem shortblock. That's why I'm considering going the oem route, and I wouldn't have to worry about the build.

Do you guys know if all the new 2.0 oem shortblocks come with the better oiling crank that came in the 05's?
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Old 03-27-2009, 01:23 AM   #14
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Quote:
Originally Posted by CHEWY911 View Post
It's about another $800 to build a motor versus buying a new oem shortblock. That's why I'm considering going the oem route, and I wouldn't have to worry about the build.

Do you guys know if all the new 2.0 oem shortblocks come with the better oiling crank that came in the 05's?
well i guess the shop that quoted you that charges ALOT more than the shop i go to. my local shop charges 550 for bore/hone install pistons,rods, bearings.my built 2.5 cost me 1600 total for everything. cp 100mm, eagle rods, acl bearings. would have been 200 less if i didnt buy 2.5 and just used my 2.0 block.
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Old 03-27-2009, 02:10 AM   #15
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^Did your machine shop balance everything?
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Old 03-27-2009, 10:44 AM   #16
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Quote:
Originally Posted by AWDWRXLOVER View Post
well i guess the shop that quoted you that charges ALOT more than the shop i go to. my local shop charges 550 for bore/hone install pistons,rods, bearings.my built 2.5 cost me 1600 total for everything. cp 100mm, eagle rods, acl bearings. would have been 200 less if i didnt buy 2.5 and just used my 2.0 block.
Wow, that's really cheap. What shop and where is it?

I was told it would be $1000 to $1500 to blue print, balance, bore, hone, and assembly. It's a hot rod shop, and they've never done one before but wanted to get into imports.
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Old 03-27-2009, 11:02 AM   #17
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Originally Posted by CHEWY911 View Post
Wow, that's really cheap. What shop and where is it?

I was told it would be $1000 to $1500 to blue print, balance, bore, hone, and assembly. It's a hot rod shop, and they've never done one before but wanted to get into imports.
the shop is called LMS. its out at the Las Vegas Motor Speedway. he has built quite a few bottom ends for us (flat4lv) and all are running fine. most of them pushing over 400 whp and a couple over 500 whp. the shop builds motors for everything including pro mod/top fuel cars, honda engines etc.
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Old 03-27-2009, 11:14 AM   #18
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my 2 cents would be look into a EJ207 and use the standard WRX heads maybe with some cam work. Semiclosed deck and is very stout. It's not all about the 2.5l block.
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