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Old 10-05-2010, 02:13 AM   #1
Jubert39
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Join Date: Aug 2007
Chapter/Region: NESIC
Location: Vernon Connecticut
Vehicle:
2004 AW Subaru WRX
JDM v7 STI spec-C

Default thoughts on my hybrid build (plan) & some questions

I start grad school in January, and my original goals of having 300whp is now pointless. I dont care for it. I drive an 04 WRX with a bad motor, and have a spare ej257 sb and 2.0L heads, and little money lol.
I plan on swapping with a friend during Thanksgiving break.
Im not subaru expert, just know the basics- Im asking for advice and any criticisms u guys see

My goals:
Reliability, its my daily driver, and I need it for commuting to classes next semester.
Power- only looking for something around what is comparable to a stock 2.0L stage 2 WRX. (230-250whp?)
Also, dont feel like having to worry about my transmission. I dont need to be the fastest, just want a semi decent quick little car

I have most of the parts, just missing a few parts like the gaskets, t-belt, and water pump.
ej257 (used with 30K miles-but excellent running condition)
ej205 heads (have been inspected and decked)
OEM ej257 sti headgasket
OEM usdm sti oil pump
Gates water pump
Gates timing belt
VF-39
STI TMIC
OEM Exedy Clutch
08 STi top feed injectors
walbro 255 fuel pump
catless turboback
catless uppipe

and a good conservative tune... (EFI?)
am I missing anything?

Only reason why im going hybrid is because I had one laying around. If I could find someone wanting to trade their running 2.0L longblock I would.
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Last edited by Jubert39; 11-25-2010 at 09:31 PM.
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Old 10-05-2010, 04:13 PM   #2
zackdick
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Sounds like a good start, I have a very similar project goin on now, buildin 03 up tryin for 325-350 whp
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Old 10-09-2010, 01:16 AM   #3
driftingrotary
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I'll trade you my working ej205 shortblock with cash on top for your ej257 shortblock.
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Old 10-14-2010, 08:09 PM   #4
Shayhan27
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CGM

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Your plan sounds good. It is a good thing you got the injectors as I maxed mine out during my tune. Mine would have easily made another 20-30 hp and tq with larger injectors. I do have cams though so that may throw off the equation.
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Old 10-14-2010, 09:14 PM   #5
Ryan314
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I would get your EJ205 heads machined to match the EJ257 bore. This will definitely help with reliability, as it will reduce hot spots and chance for detonation.
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Old 10-14-2010, 11:40 PM   #6
curo72
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Quote:
Originally Posted by Jubert39 View Post

-what is the t-stat? is that part of the water pump?
T-stat I do believe is the thermostat. About 99.934% sure.
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Old 10-18-2010, 09:39 PM   #7
Jubert39
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Quote:
Originally Posted by Ryan314 View Post
I would get your EJ205 heads machined to match the EJ257 bore. This will definitely help with reliability, as it will reduce hot spots and chance for detonation.
I would, but its so expensive (well for me at least). The cheapest I found was Over $700 + shipping. Mainly due to the fact that to make them plug in play, lots of additional fees start racking up real quick.

I was hoping to just get a really conservative tune instead, cus I do realize matching the bore would be the "ideal." However I have about a month to get this done, and will not have the funs to do it... have to buy too many other things.

Quote:
Originally Posted by curo72 View Post
T-stat I do believe is the thermostat. About 99.934% sure.
Does this come with the Water pump? For some reason I thought it was part of the water pump.

Thanks guys
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Old 10-18-2010, 09:53 PM   #8
Ryan314
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Send them to EQ tuning... $400.
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Old 10-18-2010, 10:06 PM   #9
john 1badSTI
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I usually recommend having the chambers opened up but in your case with low funds I would say just assemble it like you plan and make sure the tuner knows the situation with the heads and have him keep it a little rich to control in chamber temps and run very conservative timing.Be satisfied with whatever power it makes and don't get greddy and you can have a fairly quick and reliable car.good luck
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Old 10-18-2010, 10:42 PM   #10
Jubert39
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JDM v7 STI spec-C

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Quote:
Originally Posted by Ryan314 View Post
Send them to EQ tuning... $400.
again, to ship the heads, and all the additional fees makes it come close to 1grand. Not in my budget. The 400 is JUST for deshrouding, but to make it "bolt-on" to the block will cost a lot more

Quote:
Originally Posted by john 1badSTI View Post
I usually recommend having the chambers opened up but in your case with low funds I would say just assemble it like you plan and make sure the tuner knows the situation with the heads and have him keep it a little rich to control in chamber temps and run very conservative timing.Be satisfied with whatever power it makes and don't get greddy and you can have a fairly quick and reliable car.good luck
thats what i plan. I dont really need power, I would be have with stage 2 power from a 2.0L WRX.
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Old 10-23-2010, 12:09 AM   #11
curo72
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Quote:
Originally Posted by Jubert39 View Post

Does this come with the Water pump? For some reason I thought it was part of the water pump.

Thanks guys
I don't think it does come with the water pump. But I'm no genius, so take it with a grain of salt.
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Old 10-23-2010, 01:01 AM   #12
UP2MTNS
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Silver, Black, and Decals

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Quote:
Originally Posted by Jubert39 View Post
I start grad school in January, and my original goals of having 300whp is now pointless. I dont care for it. I drive an 04 WRX with a bad motor, and have a spare ej257 sb and 2.0L heads, and little money lol.
I plan on swapping with a friend during Thanksgiving break.
Im not subaru expert, just know the basics- Im asking for advice and any criticisms u guys see

My goals:
Reliability, its my daily driver, and I need it for commuting to classes next semester.
Power- only looking for something around what is comparable to a stock 2.0L stage 2 WRX. (230-250whp?)
Also, dont feel like having to worry about my transmission. I dont need to be the fastest, just want a semi decent quick little car

I have most of the parts, just missing a few parts like the gaskets, t-belt, and water pump.
ej257 (used with 30K miles-but excellent running condition)
ej205 heads (have been inspected and surfaces were flattened out, milled?)
OEM ej257 sti headgasket
OEM usdm sti oil pump
OEM water pump
OEM timing belt
stock td04
stock TMIC (should i go with an STi TMIC?)
stock clutch (should i go with an aftermarket? ACT stage 1?)
08 STi top feed injectors
walbro 255 fuel pump
catless turboback
catless uppipe

and a good conservative tune... (EFI?)
am I missing anything?

Only reason why im going hybrid is because I had one laying around. If I could find someone wanting to trade their running 2.0L longblock I would.

Next question is:
Seeing that I dont have all the money in the world.
-Anyone know what the basic gaskets i need to buy? part numbers? Do I need to replace every motor/engine related gasket, or can I get away with just some of them, and if so, which ones?
I know I can buy the full kit, but that comes with the sti headgaskets which I already have, and will cost me around $300.
-Should i replace the pulley and tensioners?
-what is the t-stat? is that part of the water pump?
I've gone this route and put 50K+ miles on a similar engine w/240whp.....I'll save you a few bucks here:

-not the 'best' solution, but you can still use the stock TMIC and even stock exhaust if you really want to save money....you can always easily upgrade down the line. Having gone from stock exhaust to borla hush+retune, its about 10whp (barely noticeable on the butt dyno)
-uppipe...not 100% necessary either, but its such a pain in the ass mod to do, its worth it while the engine is out.
-you can get a 'partial' gasket kit from Jeremy at www.Outfrontmotorsports.com for around $170 which has pretty much everything you need minus head gaskets.
-yes, I'd replace pulley/tensioner w/the timing belt.
-t-stat is the thermostat and unless yours got lost or was busted somehow, you should be able to reuse it.
-you'll be fine with a cheap stock clutch


good luck.
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