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Old 05-30-2012, 01:21 PM   #1
cDorch
Scooby Newbie
 
Member#: 301166
Join Date: Nov 2011
Chapter/Region: NESIC
Location: Cape Cod MA
Vehicle:
02 WRX Hybrid 6spd
WRB

Default Another first build thread (hybrid)

So I got screwed and bought a 6spd hybrid bugeye on here which ended up having the infamous piston #4 ringland issue. It is torn down now and almost ready for reassembly but I wanted to run my build by you guys. I am doing this on a budget but want it to be done right and good for 450whp in the future. Here's the previous build that made 351/329 at 21psi:

05 EJ257 shortblock
02 EJ205 heads - ported, polished, 3 angle valve job
Kelford 272 Cams
Brian Crower dual valve springs
Deatschwerks 850cc injectors
Slowboy Racing TD06 20G turbo
Godspeed tmic
AVO 50/50 bov
Hallman Pro mbc
APS 70mm Cold Air Intake/ Turbo Inlet
A'Pexi N1 Catless Exhaust/ Downpipe
Grimmspeed AOS (should i switch to catch can?)

Since I am on a budget I am just rebuilding the shortblock with new pistons and keeping the rest the same for now(only thing added were TGV deletes).
New build:

CNC'd combustion chambers to match ej257 bore
ACL Race rod & main bearings
100mm 8.5:1 JE FSR pistons
Stock ej257 crank and rods looked brand new so they are getting balanced and re-used
Factory STi gasket kit
ARP headstuds
Gates timing belt

Now my questions were do I need any other gaskets than those in the 05 sti gasket kit?(will the cam seals, valve cover gaskets, etc. fit my ej205 heads?) Also, what else should I be replacing while I have it apart? (08 oil pump? killerb pickup? case bolts? just the basic gates timing kit not the blue one?) Any assembly tips/good subaru manuals to go by? Also any other comments/criticism welcome.

FYI, I am building the motor and Chris at EFI will be tuning it
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Old 05-30-2012, 06:54 PM   #2
KpT KiM
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Member#: 242422
Join Date: Mar 2010
Default

You do not want an STI gasket kit. The intake cam seals are different as well as the head cover seals. There might be other stuff but those two are what I remember from the top of my head.

What you want is a gasket kit for whatever year your WRX is but STI headgaskets instead of the WRX ones.

I'm running an STI oil pump with my hybrid build but a normal WRX one is just as good if not better because you don't have AVCS.

Gates timing belt kits are fine but you have to get the right one as the tensioner can be different so you can't bolt it in well if you get the wrong set. It's hard to explain but if you search around you can find more info on it.

I did not upgrade my pick up tube. I wish I did, but mine had no cracks or anything after 130K miles. I would get the Covert or KillerB one. I also did not get an STI oil pan. If you do, get an STI dip stick as well as the WRX one will read wrong.

Last edited by KpT KiM; 05-30-2012 at 07:00 PM.
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Old 05-31-2012, 06:01 PM   #3
cDorch
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Member#: 301166
Join Date: Nov 2011
Chapter/Region: NESIC
Location: Cape Cod MA
Vehicle:
02 WRX Hybrid 6spd
WRB

Default

Thanks for the info! guess i need some gaskets lol and Im not even sure if i have an sti oil pump/pan/pickup so ill have to check on that and then decide.
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Old 06-04-2012, 07:40 AM   #4
cDorch
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Member#: 301166
Join Date: Nov 2011
Chapter/Region: NESIC
Location: Cape Cod MA
Vehicle:
02 WRX Hybrid 6spd
WRB

Default

So I have an 06 sti pan/pickup so I am going to get a KillerB and I ordered an 08 sti oil pump today. I need to order my timing belt kit today as well but I can't seem to find the thread or info you are talking about. Do you happen to know which gates kit definitely works for my hybrid?
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Old 06-04-2012, 12:07 PM   #5
KpT KiM
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Quote:
Originally Posted by cDorch View Post
So I have an 06 sti pan/pickup so I am going to get a KillerB and I ordered an 08 sti oil pump today. I need to order my timing belt kit today as well but I can't seem to find the thread or info you are talking about. Do you happen to know which gates kit definitely works for my hybrid?
So you want the Gates kit for your year bugeye (02 or 03 WRX). Thing is, in those years, at some point they changed the "depth" of the hole where the bolt goes in the tensioner. So, if you get a slightly wrong tensioner, you could end up destroying the threads and have to recut them as your stock bolt will not be long enough. Basically be careful when putting the tensioner on, or let your shop know so that if the bolt isn't long enough you can just buy a longer one or get the other type of tensioner.
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Old 06-04-2012, 01:32 PM   #6
cDorch
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Member#: 301166
Join Date: Nov 2011
Chapter/Region: NESIC
Location: Cape Cod MA
Vehicle:
02 WRX Hybrid 6spd
WRB

Default

Thanks! I will look out for that. However, I didn't know that I am supposed to order it for my 02 car and not for my 05 shortblock. Will the wrx water pump in the kit work with my sti block?
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Old 06-05-2012, 12:33 AM   #7
KpT KiM
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Quote:
Originally Posted by cDorch View Post
Thanks! I will look out for that. However, I didn't know that I am supposed to order it for my 02 car and not for my 05 shortblock. Will the wrx water pump in the kit work with my sti block?
Yes it will. I'm not 100% positive but I believe all timing belt kits for turbo'd imprezas are the same with minor differences (like the tensioner).
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Old 06-08-2012, 11:58 AM   #8
cDorch
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Member#: 301166
Join Date: Nov 2011
Chapter/Region: NESIC
Location: Cape Cod MA
Vehicle:
02 WRX Hybrid 6spd
WRB

Default

Okay thanks again, all my parts arrived today so assembly starts this weekend! I plan on using both the 02 wrx and 05 sti factory service manuals for my torque specs...is there a better option for this or any hybrid-specific issues I may run into?
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