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Old 02-09-2011, 10:03 PM   #1
justooln2
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Default 05 EZ WRX to STI swap? what where

Ok, I played a little too hard in my 05 WRX. I’ve spun a Rod bearing really bad, so the engine is SHOT…
So it’s time for a new one. May as well look into upgrading too.
It needs to be a daily driver, nothing to damn radical if I can get 300WHP id be very happy. And my time frame is a little short too.
I’m looking for an EASY swap here; buy something that I don’t have to re-invent the wheel to install. Is there a bible / swappers guide somewhere? Any ideas? Thanks in advanced Don L Peoria Il.


Update 6/6/11

6-12-11 Update. Tuning new Engine. Pulls hard all the way to 7.5k estimating 350 hp at the crank. That's enough for this trans.
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Last edited by justooln2; 07-12-2011 at 06:55 PM. Reason: add follow up video
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Old 02-10-2011, 12:19 AM   #2
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300whp is nothing on an EJ. The EZ is the opposite of quick, cheap or easy.

just get a built EJ because it's cheaper, easier, drop in, can easily meet your goals, etc...

you were flogging that spun bearing for a hot minute

those pans were notorious for slosh, donuts keep oil trapped in the head and 02-05 EJ205's are known for spinning bearings...

Last edited by Homemade WRX; 02-10-2011 at 12:25 AM.
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Old 02-10-2011, 12:39 AM   #3
justooln2
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Ok, I guess I'm still to nub. What's an EJ?
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Old 02-10-2011, 12:41 AM   #4
justooln2
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So. Your just saying to buy the same engine. Just built up version?
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Old 02-10-2011, 01:35 AM   #5
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Are you saying you want an EZ swap or an easy swap?

EZ/EJ are engine codes
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Old 02-10-2011, 06:15 AM   #6
justooln2
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ROFLAO. um. Ok. That makes more cense now. I mean an EASY SWAP. plug n play mind set. Sorry. I didn't even know there's an ez engine code. I'm more a muscle car guy. But I like my sube too.
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Old 02-10-2011, 10:19 AM   #7
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ok, gotcha now

all you most likely need is a shortblock and you have numerous options. Strokers (from 2.1L up to 2.7L etc), long rod builds (2.0L-2.5L), and then stock stuff...all depends on which block you want to start with; EJ20 (you have now), EJ22(na mostly and turbo models are hard to find), EJ25 (both na and turbo)...
how about tell us what you want from the car and we can help steer you in the right direction.
Just to get it back on the road and running, grab stock shortblock and fire it up.

You can got to the 'Built Motor Section' and do some reading there. You'll find a lot of 02-05 wrx guys go to an EJ257 (sti) block after popping a factory engine. This is commonly called a 'hydrid' and you'll find TONS of theads and discussion on the subject.
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Old 02-13-2011, 08:28 AM   #8
justooln2
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Default 2.0 heads? where to get Complete Reman set?

Does anyone know where I can get a good set of ReMan EJ20 Heads for my 2005, Its looking like I am going to build the Hybrid EJ257 block.. Im all over ebay and the Interweb and cant seem to find any Complete reman heads!?
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Old 02-15-2011, 06:09 PM   #9
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Default why not stock heads?

You don't want to use your stock heads? I thought that was the appeal of hybrid builds, is you're really just replacing the short block with a 2.5...
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Old 02-15-2011, 06:41 PM   #10
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I don't think ppl are understanding how much a screwed my ej20. I think I've got a blown headgasket spun rod bearing and there's no way I'm going to assume any major components on my current engine are reusable without being magnifluxed and re-machined. After my new hybrid is built and installed. Then I'll c about getting my heads reworked. Either sell em or spares.

Last edited by justooln2; 02-16-2011 at 10:21 PM. Reason: clarification
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Old 02-16-2011, 10:19 PM   #11
justooln2
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Default Researched sofar, for the Hybrid build.

Ok, so here is what I have come up with over the last week. I dont plan on running crazy boost pressures, maybe 18PSI maybe. Id rather not open up the STOCK EJ257 short block to change out pistons, whats your take on the mild build and stock pistons?
heres the list, I just copied my Excel doc so its kinda funky.
WRX Engine Cost Tracker
X= Purchased

ENGINE
Still Need
Already Have Optional
XXX 2.0 Heads X X $ 700.00

2.5 Short Block $ 1,961.99


Cometic Head gasket set $ 89.90


Complete Head gasket set $ 240.00


1 Range Colder Plugs $ 65.00


255LPH fuel pump $ 73.97


Pink 565cc Fuel Injectors $ 358.00


Water pump $ 75.00

XXX Boost Gauge $ 44.99

XXX 52mm Oil pressure guage X X $ 107.99
XXX AEM A/F Gauge X X $ 168.79
XXX ARP Head Studs X X $ 110.00

52mm Triple gauge pod $ 29.99

XXX 50/50 BOV X X $ 94.00

Sylicone intake tube $ 84.99


O2 Sensor NGK $ 266.66


11mm Oil Punp $ 145.95


12mm ? Oil Pump $ 240.00

3/8 Torque Wrench

XXX 1/2 Torque Wrench X X $ 95.00

TMIC Kinda Need
$ 150.00

Hood scoop really want
$ 110.00





Total Estimated cost to build is Right at $5000.oo
Total End Cost. of ENGINE Hardware = $5854.26
Updated 6-10-11 Total End Cost of everything...............$6731.88

Last edited by justooln2; 06-10-2011 at 09:42 AM.
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Old 02-17-2011, 11:31 AM   #12
Seraphinwolf
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If you don't even have the tools you need and have never done this before have a shop do it for you. Get a shortblock, have them machine the heads cause to do a hybrid you need to machine them to match propperly. What fuel will you be running and what turbo?

ALSO FOR GODS SAKE USE WHOLE WORDS WHEN ASKING FOR SERIOUS HELP! Cutting words down to a few letters or any of that **** is just stupid if you want someone to answer you seriously. Also stick to 17" light wheels rather than doing to 18"s cause you'll just rob power you'll be making.

If all you did was spin a bearing and blow a headgasket you can reuse a number of parts. Hell you can rebuild the 2.0L and make 300 still if you really wanted.
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Old 02-17-2011, 11:31 AM   #13
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Damn it hate when I get in to flame mode... especially on NASTICOCK
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Old 02-17-2011, 11:36 AM   #14
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How'd I know you'dpop in here with EZWRX in the title?
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Old 02-17-2011, 12:08 PM   #15
Seraphinwolf
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Curiosity killed the cat...
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Old 02-17-2011, 12:41 PM   #16
justooln2
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First I will say thanks for your input. I understand how impersonal forums and people in general can be when online. As in you have no idea that I have 5 years experience as a machinist at one of the best R&D buildings for Caterpillar, and am now the Chief engineer on an offshore shipping vessel. Nor do you understand that I have built maybe a dozen high hp American Iron engines. My last toy was a 2G Talon that without going internal, just bolt-on and tune custom built propane injection “by yours personally”. I got that car neighborhood of 400hp on a daily driver. With 145K miles when I sold it. “ I check in on it now and then, shes still strong”.
I understand I can reuse probably everything in my engine, and plan to build it at a later date, after I find a good machine shop that’s local. But its easier for me to buy a short block. I have been doing the research and have just learned that I might want to get my ej20 heads machined so I can keep my compression ratio in a manageable range. “ again that’s the kind of information I am looking for on these forums.”
The entire car is stock. Minus the Perrin Up-pipe, TD05 Hybrid Turbo, Catless 3” turbo back exhaust and a tune Via Open Port V2
I am also aware that those mods, without the supporting Fuel delivery is the major factor in my predicament right now.

Originally I was thinking about buying a JDM STI complete Drive train for about 7k but itd be used, and Id still have to figure out how to incorporate it into my harness, Keep in mind I am building a 1970 Chevelle, that car is my project. This one is my Daily Driver, but it still needs to bring a smile to my face.

So I have come to the conclusion that a EJ257 shortblock get my heads that Ive already bought, reworked for the match to this setup. New mild injectors, and just about every other hose, censor thermostat ect. Will be all new. I probably will only run 17-18 PSI keep it on the rich side for safety and cylinder cooling too.

Tools I need, well I actually don’t own a Torque wrench. What else to you think I might need. Ive done pretty good with my two Crescnet wrenches and my Big Red F*^king Hammer. Oh, torch and even bigger hammer too. My garage fridge always gots some beer in der too..

But thanks for the input.
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Old 02-17-2011, 02:07 PM   #17
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Get a quality torque wrench from one of the "name" brands such as Snapon or Mac Tools (or Crapsman). If you don't think you'll need a torque wrench in the future, you can rent one from Autozone or O'Reilys.

Invest in a high quality (US made preferably) 6-point metric socket set if you don't already have one. You'll also need a 14mm 12-point socket for the heads.

Your dealer might be convinced to print out the torque specs for all the bolts on the engine. Good luck!
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Old 02-17-2011, 05:49 PM   #18
justooln2
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Right on. Thanks for the heads up on the head bolt size. I'll probably have to get a stronger socket.
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Old 02-17-2011, 06:04 PM   #19
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If all you are looking to do is looking to get 300whp, find a 2002 - 2005 WRX part out, put the short block in your car with your heads (assuming they are fine) and get a slightly bigger turbo ( 16g / 18g ) I don't know how much corn they have down in Peoria, but an E85 tune would get you there nicely. You would definately need a tune, but all of this could be done in 1 long weekend quite easily. This would be the easiest method.

I don't know if you need to change any wires on a hybrid swap or not, I've never done one, but I think that there would at the bare minimum need to have a tune done to your car... Good luck!
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Old 02-17-2011, 09:18 PM   #20
justooln2
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ill set up the car with a mild tune, then get it tuned up in chicago probably ive already got the exhaust sides upgraded.

Still looking into all the little things, I am going to contact Equilibrium about machining my Combustion chamber to the STI profile.
Looking at little larger Injectors, and TMIC, little things here and there. lots of ideas on this forum as well as CICENET and wrxtuners too. for the most part everyone has been very informative.
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Old 02-17-2011, 10:59 PM   #21
justooln2
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has anyone used these injectors?

DeatschWerks TF Fuel Injectors 565cc Subaru WRX 02-up

http://cgi.ebay.com/ebaymotors/ws/eB...AMESINDXX%3AIT
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Old 02-27-2011, 10:25 PM   #22
justooln2
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Default Open Source ROM options

ok, So Ive been buying parts left and right getting ready for this build.
But, what ROM do I run? I currently have the STOCK ROM loaded, and I do have a stage two saved, but damn, what about the new displacement or the new larger fuel injectors.. I have not seen any info on what ROM setup people are running with a Hybrid build.. point me in the right direction if you can, thanks Don L
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Old 03-08-2011, 10:29 AM   #23
justooln2
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Look at the last post, and Yet I have another question too,, What Fuel Injectors should I run? I was looking at 565cc's but after talking to a guy "not very much confidence in his opinion" He said I should be running 850cc or larger.. Any input?
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Old 03-15-2011, 12:10 AM   #24
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Im putting a new shortblock on my sub, what other upgrades would u guys recomend? i feel like a new turbo might be needed.
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Old 03-19-2011, 01:04 PM   #25
justooln2
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Quote:
Originally Posted by Jefe009 View Post
You don't want to use your stock heads? I thought that was the appeal of hybrid builds, is you're really just replacing the short block with a 2.5...
You can use your stock heads, but the compression will be to great, so you have to use a larger head gasket, or the better option is to get your heads machined to match the cylinders of the 2.5 and a larger compression chamber. I am quoting someone else here, but, The sti's compression ratio is 8.2:1 running 14.5 psi and the wrx is 8.0:1 at stock boost levels.
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