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Old 07-05-2008, 11:19 AM   #1
johnwrx
Scooby Newbie
 
Member#: 23631
Join Date: Aug 2002
Vehicle:
2007 STI
Blue

Default Engine rebuild

Hello to all,
my WRX 2002 engine have problems then it's was thinking it's time for a rebuild.
I d'nt' want an EJ25, would like to rebuild mine.
With a budget of 2000-3000$ what can i do and where can i buy the pieces?
I was thinking:
pistons wiseco/cosworth (will my open deck support 92.5mm? )
rods cosworth/carillo
hp oil pump
for head gasket i don't know 0.78 or 1.1 or 1.5 mm?????
ARp or cosworth head studs

Really confused about it

thank to all for help

G
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Old 07-05-2008, 11:24 AM   #2
apex32
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Member#: 165252
Join Date: Nov 2007
Chapter/Region: NESIC
Location: Southern NH
Vehicle:
2011 GT 5.0
Race Red

Default

wow for under $3k you can buy a brand new forged everything block from gruppe-s or somewhere. and it would be a 2.5 beast
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Old 07-05-2008, 11:25 AM   #3
pddvl1
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Member#: 134480
Join Date: Dec 2006
Chapter/Region: SWIC
Location: phx,az north
Vehicle:
02 wrx
blue

Default

Quote:
Originally Posted by johnwrx View Post
Hello to all,
my WRX 2002 engine have problems then it's was thinking it's time for a rebuild.
I d'nt' want an EJ25, would like to rebuild mine.
With a budget of 2000-3000$ what can i do and where can i buy the pieces?
I was thinking:
pistons wiseco/cosworth (will my open deck support 92.5mm? )
rods cosworth/carillo
hp oil pump
for head gasket i don't know 0.78 or 1.1 or 1.5 mm?????
ARp or cosworth head studs

Really confused about it

thank to all for help

G

Use your 2.0 block send it to cgperformance in Ca I think have them close deck it 600 I think, and they can do the rest for you. upgrade rods and pistons to forged units ,cams, port the head, exhaust manifolds to grimmspeed for the extrude hone,and crossover, then upgrade turbo to 1820 pe or someother not too big ball bearing turbo and haveit tuned by a competent tuner and you should make some tranny breaking hp good luck Arp studs are fine same as cosworth, rods go eagle the cheap ones, new oil pump for 2.5 l shimmed,headgaskets cometic thickness depends on what compression ration the pistons and the chambers end up after machine work the machine shop should tell you when building all the gaskets you can get at Jscspeed, they carry all the cometic thickness good luck the 2.0 will rev higher it will be perfect
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Old 07-05-2008, 02:32 PM   #4
johnwrx
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Member#: 23631
Join Date: Aug 2002
Vehicle:
2007 STI
Blue

Default

Thank You all for advice,
I live in Switzerland, and i can't send the block there, it will cost me a lot.
I have a company that take off the short block make all the work and put it again inside.They make only engine, no tuning.
But the pieces, i must give them, that' why i was asking what i can put inside.
I'm looking for 360-400 ps (not on the wheels), but shure and the engine must hold them without problems.(thinking in the future).
The gearset will come after, when they broke.
the cr is 8:1 now ,more what it means in term of performance?
I need 92mm pistons or 92.5 pistons?
With thiker head gasket i have more cr?

thanks again
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Old 07-05-2008, 09:21 PM   #5
icslowmo
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Member#: 114667
Join Date: May 2006
Chapter/Region: SWIC
Location: Peoria, AZ
Vehicle:
00/5 Silver STi RS
FAT 40R kit w/ FMIC

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What happened to your original motor??? Spin a bearing??? Loose compression??? Burning oil??? Over heated??? Depending on what happened, will help get a better idea as to what you need to re-build engine..
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Old 07-06-2008, 03:20 AM   #6
johnwrx
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Member#: 23631
Join Date: Aug 2002
Vehicle:
2007 STI
Blue

Default

The engine problem is, that i must put 1kg/1l oil every 600 km and come always a misfire error in cylinder 2.
But the cars goes good, no problem at all.
But i was thinking, if i start a job to my engine it's better to do a good job.



Mod auto:
Complete exhaust system
Trust filter in basket
Topmount intercooler
Samco hoses
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Old 07-06-2008, 08:10 AM   #7
my99maddog
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Member#: 55515
Join Date: Feb 2004
Location: Canberra ACT Australia
Vehicle:
1998 MY99

Default

92.5mm is fine for an open deck, set of Wiseco pistons to suit and the rest depends on your budget. You can re-use standard rods and crank, matched with a TD05-16G you will have a sound package. If your going to do rods then Carillo, Pauter or Eagle listed in order of cost and quality are fine. If you must replace the Crank because of damage then change the recipe to a 2.2l and buy a 2.5L crank, use Wiseco's 92.5mm stroker pistons and rods to suit deck height.
You have probably broken a ring land and or rings, are you sure you don't have a manual boost valve you forgot to mention in your mods list?
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Old 07-06-2008, 11:59 AM   #8
sopmoney
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Join Date: Apr 2007
Chapter/Region: MWSOC
Location: illinois
Vehicle:
03 tomei ftw!
psm

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carrilo rods=800
arp headstuds=200
pistons= 500
gaskets= easily 200
depending on whats wrong you could spend 1000 on mill work
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Old 07-06-2008, 12:21 PM   #9
johnwrx
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Member#: 23631
Join Date: Aug 2002
Vehicle:
2007 STI
Blue

Default

Thanks to all for advices,

i don't have a manual boost controller, but i've noticed an update boost to 1.1 bar when i put the big top mount.
I've heard that putting a 92.5 in my open deck is a little bit dangerous, because the cylinder walls became thinner...but not shure.
that's why i'm thinking a 92 mm or a 92.020 mm.
If i put a 92.5 mm pistons with carillo, manley or other special rods, with standard crankshaft, what i will have more?Power?Torque?
with a 92 mm piston what headgasket i need 0.78, 1.1 or 1.3.....or?
the same but with 92.5 mm.
I think i need a fuel rail too, which one is the best?

Thanks again
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Old 07-07-2008, 05:25 AM   #10
my99maddog
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Member#: 55515
Join Date: Feb 2004
Location: Canberra ACT Australia
Vehicle:
1998 MY99

Default

An EJ20 come standard at 92.0mm Normal size increases would be 0.5mm, your OK to 93mm with an open deck. I am no engine builder but you need to customize a build or your just an "assembler". Head gaskets are chosen according to how much the heads are shaved, the block is shaved, the piston profile/dish used, rod length, crank stroke, and the target compression ratio your chasing.

Compression ratio depends on your application, hi power drag/track cars generally run lower about 8:1 to allow more boost. Fast turbo street cars 9:1 to ensure they are constantly on song. The rest depends on the condition of your existing components and engine builder/ machinist. With my engine build custom rods were ordered last after everything was trial assembled and measured. Pistons or rods will not (generally) add power, combined with a bigger turbo or more boost and a more aggressive tune it will allow you to keep more power longer. A longer stroke crank will add torque and power.

Your fuel rails are probably fine but my best suggestion is try and find an "Engine Builder", not an assembler. It will save you a lot of grief in the long run.
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Old 07-10-2008, 09:16 PM   #11
EuroScuby
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Member#: 146056
Join Date: Apr 2007
Location: Germany
Vehicle:
2004 Subaru WRX STI
Blue

Default

JohnWRX, Your best bet is what Apex32 is telling you. If you have $3000 US then buy an Axis Racing block with all forged internals and have it frieghted to Europe. I live near Frankfurt and work with Stephen from www.iaperformance.com regularly. I buy all my parts from him and he comes over to Germany to tune my car. We have shipped an EJ257 to Frankfurt from the US before and at the end of this year I am shipping a new EJ257 built by Ron Williams at Axis racing with all forged internals to Frankfurt. Stephen will fly to Germany from the states and help me with the install and retune.
I have an 04 STi with a GT30R turbo putting down around 450ps at the wheels. I killed my motor on my last trip to Nurburgring so everything needs to be reworked. If you need any parts sent to Switzerland, or any work done on your car, get a hold of Stephen at IA Performance. It is cheaper for him to come to Germany and tune my car than it is to get my car tuned by a shop here in Germany.
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