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Old 02-26-2013, 12:17 PM   #51
FuJi K
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NF Performance

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What is your setup?
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Old 02-26-2013, 10:00 PM   #52
db_amn
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I ran a 2.5l stock internal sti short block with 02 ej205 heads with stock sti head gaskets on a 16g with a front mount for about the last 2 years. My only issue is I was only running on a base map set to 18 psi and it was for 2.0l, My screw up that I could never afford to get it properly tuned. It ran very strong for a long time until I overboosted (wrong gear) and believe lost piston #3, still limped along for a few months until completely failed. Im now in the process of doing a full build with it but more street performance minded than race minded. One thing I was looking at is Import Image Racing has a service through Equilibrium tuning for port matching the heads to 2.5l specs. Ive been told the factory sti head gaskets will actually hold up quite a bit (My friend is over 500hp on factory sti gaskets and head bolts, on an 06 wrx) hope this helps at all!
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Old 04-16-2013, 04:25 PM   #53
99snowhiteRS
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I'm gonna bump this thread and ask a couple "hybrid" newb questions:

My current situation: blew my 04 wrx block, heads are mint and bought a stock 2005 sti block.

My question is what wrx components can I "reuse" ie: oil pan, water pump, oil pick up, block skirt, etc. etc. from the wrx or do I need to source all oem sti stuff or better.

I obviously realize I need an sti oil pump and was gonna go with the 12mm sti pump, but what else from my wrx engine can I reuse?

Thanks!
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Old 04-16-2013, 04:30 PM   #54
25rsti
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Get a 10mm oil pump, anything over is overkill. Look into the Killerbee pickup.

I run an STi oil pan on mine.
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Old 04-16-2013, 05:17 PM   #55
db_amn
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Except for the oil pump, i reused everything else from 2.0l motor on the 2.5 block
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Old 04-16-2013, 06:02 PM   #56
99snowhiteRS
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Quote:
Originally Posted by db_amn View Post
Except for the oil pump, i reused everything else from 2.0l motor on the 2.5 block
Thanks guys! Did you also use the 2.0 pulleys, and 2.0 cam gears and obviously went with a new timing belt? But does the timing belt have to also be an sti or do they share the same part numbers!

Thanks again!

ps- anyone know if the block skirt is ok to reuse/the same? thanks!
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Old 04-16-2013, 07:52 PM   #57
db_amn
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Yeah, i used all the same pulleys and everything, i believe the new belt was a wrx belt as well but the sti kevlar belt is optimal. I was told the standard belts are the same pn, but check with the parts dept at your local dealership to be sure. I used a brand new short block when i did mine, but as long as theres no scratching in the walls, maybe only honing should be needed. Only other specific sti thing i had to get was head gaskets (obviously) everything else bolted right on
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Old 04-16-2013, 08:23 PM   #58
03SubyWRX
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Take the block to a reputable machine shop that knows EJs. Only they can tell you if the block is usable.
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Old 04-16-2013, 08:36 PM   #59
99snowhiteRS
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Yeah nah the block should be good I'm talking about the skirt that sits under the block just before the oil pan, it's got a spot for the pickup to pass through
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Old 04-16-2013, 09:33 PM   #60
kellygnsd
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702 series EJ257 SB
Custom 100mm Wiseco pistons, 8.5:1 CR
STi rods
ACL bearings
DPR ported 2.0L heads, +1mm valves and 8500 rpm valve train
Cosworth 272 cams
P&L oil pump
Killer B pickup
Cosworth oil baffle
EFR7670 TS turbo kit
Link G4 extreme ECU
Crawford AOS
more stuff...

VD plots shows anywhere from 375 - 410whp @ 15psi with mild timing.
Motor has 5000 miles on it so far but unfortunately the last two compression test @ 500 and 1500 miles show compression #'s of 123, 145,145,150.

Car still runs like a champ and burns no oil but the SB is being replaced with a sleeved 2.35L long rod motor not only because of the compression issues but because I don't think this block will handle the boost my turbo wants to put out. I also want a bottom end that I can spin to 8.5K rpm.



NOTE: This is the same engine that was in my last Suby for 30K miles without a problem. Motor made 400 on 91 pump and 460 on good gas with a GT3076 turbo. That car was lost in a fire and the engine was salvaged and rebuilt. Apparently it still works.

Last edited by kellygnsd; 04-16-2013 at 09:39 PM.
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Old 04-16-2013, 09:34 PM   #61
kellygnsd
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Quote:
Originally Posted by 99snowhiteRS View Post
Thanks guys! Did you also use the 2.0 pulleys, and 2.0 cam gears and obviously went with a new timing belt? But does the timing belt have to also be an sti or do they share the same part numbers!

Thanks again!

ps- anyone know if the block skirt is ok to reuse/the same? thanks!

It depends on what oil pan you are using. If you aren't changing pans use what you have.
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Old 04-17-2013, 02:51 PM   #62
luciferMotorCade
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I am putting together a stock hybrid. New STI short block with killer b pick up tube 2.0l heads will be machined by asf or eq. building it for a dd so 250-275Whp is really all you need for the street. Eventually when I get money for a 6speed I will build a nasty motor .

first setup was...


stock 257 bottom end
stock 2.0l heads
stock 2.5l head gaskets
vf39
greddy flat plate dp
catless up pipe
greddy evo2 catback
hyperflow fmic
I spun a rod bearing but it was my fault buying another mans creation and not having a shop check the car out first.

It lasted 51k. on 16psi making 307whp and 340wtq. tuned by P.R.E.
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Old 04-20-2013, 10:15 AM   #63
THE_KING_04
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I am finishing up my hybrid build I can't wait!!

2003 wrx heads chamber matched to 2.5L
257 ported
10mm oil pump
Motive TVG deletes
Complete killer b oil system
Gsc beehive springs/ retainers
Gsc S1 cams
Gtspec header/up pipe
Dom 2.5 XTR 8mm
44mm EWG
EBCS-motive
OEM gaskets to include 2.5 HG
Manle pistons
Eagle h beams
2008sti TMIC
ID 1000cc
APS fuel rail kit
APS inlet

Version 7 drive train!!

Hoping to put 360 to wheels

What do you all think?
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Old 04-29-2013, 02:33 PM   #64
pwe1031
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Quote:
Originally Posted by luciferMotorCade View Post
I am putting together a stock hybrid. New STI short block with killer b pick up tube 2.0l heads will be machined by asf or eq. building it for a dd so 250-275Whp is really all you need for the street. Eventually when I get money for a 6speed I will build a nasty motor .

first setup was...

stock 257 bottom end
stock 2.0l heads
stock 2.5l head gaskets
vf39
greddy flat plate dp
catless up pipe
greddy evo2 catback
hyperflow fmic
I spun a rod bearing but it was my fault buying another mans creation and not having a shop check the car out first.

It lasted 51k. on 16psi making 307whp and 340wtq. tuned by P.R.E.
Tell me more. I wanna start my hybrid ASAP. i have been reading n searching but im just confused. Can I get away wit a stock hybrid built using ej205 heads wit no problems? Or do I need aftermarket/ forged pistons, or my heads machined? I'm looking for a dd with reliability and of course a lil street performance. I need some advice or direction on this build. I'm thinking:
New sti shortblock
11mm sti oil pump
Gates racing timing belt water pump kit
Wrx oem gaskets, sti hg or aftermarket xx.mm hg???
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Old 04-29-2013, 03:11 PM   #65
kellygnsd
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LINK G4 hybrid STi

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Slapping stock 2.0L heads on a stock 2.5L bottom end is the worst way to go about putting together a hybrid. Either get pistons to make your CR right or get chamber work. As a last resort go with a thicker HG.

Your plan of doing none of those things will result in poor results and another one of those failed hybrid threads guaranteed.
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Old 04-29-2013, 03:23 PM   #66
luciferMotorCade
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Quote:
Originally Posted by pwe1031 View Post
Tell me more. I wanna start my hybrid ASAP. i have been reading n searching but im just confused. Can I get away wit a stock hybrid built using ej205 heads wit no problems? Or do I need aftermarket/ forged pistons, or my heads machined? I'm looking for a dd with reliability and of course a lil street performance. I need some advice or direction on this build. I'm thinking:
New sti shortblock
11mm sti oil pump
Gates racing timing belt water pump kit
Wrx oem gaskets, sti hg or aftermarket xx.mm hg???
Im was lucky that my car lasted 51k with stock 2.0l heads and stock sti bottom end with over 300whp on a dynojet. I am going get my heads re worked and now looking into JE's hybrid pistons. 2.5l head gaskets is what you need to be looking into, WRX hg's will not work with a 2.5l bottom end. Talk with whoever will be building the motor/car or tuning it. They should have some opinions on what you should do with your build.
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Old 04-29-2013, 05:00 PM   #67
pwe1031
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Are piston for durability? I decided to get my heads machined. Are pistons necessary to get aswell? And how do I know to go with the sti/2.5 head gasket or wit a different mm head gasket?

Last edited by pwe1031; 04-29-2013 at 05:37 PM.
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Old 04-29-2013, 07:07 PM   #68
25rsti
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I've been driving mine for awhile still breaking it in and so far it's a BEAST.
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Old 04-29-2013, 08:11 PM   #69
03SubyWRX
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My hybrid is still going strong. Hits early and hard!
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Old 04-29-2013, 09:18 PM   #70
Dr. octagon
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Quote:
Originally Posted by pwe1031 View Post
Are piston for durability? I decided to get my heads machined. Are pistons necessary to get aswell? And how do I know to go with the sti/2.5 head gasket or wit a different mm head gasket?

search
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Old 04-29-2013, 09:34 PM   #71
awd-turbo
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Quote:
Originally Posted by kellygnsd View Post
Slapping stock 2.0L heads on a stock 2.5L bottom end is the worst way to go about putting together a hybrid. Either get pistons to make your CR right or get chamber work. As a last resort go with a thicker HG.

Your plan of doing none of those things will result in poor results and another one of those failed hybrid threads guaranteed.
So can I do all the above? Get pistons, and chamber the heads along with a thicker head gasket? And have a decent cr? I am new and I am in the middle of ripping my 02 in half after 225k.... I want more power.. and I finally have money this is my first build ever... And I have been reading like crazy the past couple of days...
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Old 04-29-2013, 10:15 PM   #72
pwe1031
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Quote:
Originally Posted by Dr. octagon View Post

search
I been searching & reading however I'm new to subies n all this so its a lot to consume. I tried to prevent from asking, posting or opening a new thread but my tech is bout to build for me in a couple weeks.
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Old 04-29-2013, 10:16 PM   #73
pwe1031
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Quote:
Originally Posted by 03SubyWRX View Post
My hybrid is still going strong. Hits early and hard!
What do u have for a set up?
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Old 04-29-2013, 10:26 PM   #74
kellygnsd
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what CR do you want? Once you know that you build accordingly.
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Old 04-29-2013, 11:31 PM   #75
pwe1031
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Idk what cr to run. Don't know much on that topic. Just trying to get away with the most affordable hybrid build I can do. I want to just machine the heads & slap them on the sti short block with out upgrading the internals but I'm not sure. I hear the oem piston r junk so I don't know weather to upgrade. What compression &/or piston are recommended?
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