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Old 10-04-2009, 10:44 PM   #1
beaviscih
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Member#: 123362
Join Date: Aug 2006
Chapter/Region: MWSOC
Location: Dorothy's House
Vehicle:
'93 Crapcan, '98L
Sold, '04 STi - Sold

Default EJ20G Rebuild - Looking for Suggestions

While I recently completed an EJ20G swap into my '98L I'm picking up another EJ20G (couldn't pass up the deal... http://forums.nasioc.com/forums/show....php?t=1854408). This will be my first engine tear down / rebuild. Goals are pretty simple, a fresh engine that I'm comfortable pushing the boost to 20-22psi. Budget is under $2k (I will do all the work excluding porting/polishing). Before I dive off in this I would appreciate some suggestions / opinions (I know - that's asking for trouble ). Here is what I'm thinking...

EJ20K Heads - just stock, no porting, possible deal pending
Forged Pistons - what type? Can I use these? http://forums.nasioc.com/forums/show...hlight=pistons
ACL Bearings - still looking for the part number
EJ20G Head Gaskets - (I'm having trouble finding the part number in the system - but still looking)
ARP Head Studs - need to find the part number
TDO5 Turbo - send it off for a port/polish
USDM Oil Pump - ported
DW 650cc Injectors - from my EJ20G
Ider Pulleys / Belts / Seals / Gaskets - Duh
LinkG4 Ver1-6 EM (currently running my EJ20G)
Anything else I'm Missing?

Thanks in advance.
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Last edited by beaviscih; 10-04-2009 at 11:07 PM.
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Old 10-05-2009, 06:00 AM   #2
Audioexcels
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Member#: 104824
Join Date: Jan 2006
Location: Here and There
Vehicle:
1996 EJ20G OBS
Black

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Quote:
Originally Posted by beaviscih View Post
While I recently completed an EJ20G swap into my '98L I'm picking up another EJ20G (couldn't pass up the deal... http://forums.nasioc.com/forums/show....php?t=1854408). This will be my first engine tear down / rebuild. Goals are pretty simple, a fresh engine that I'm comfortable pushing the boost to 20-22psi. Budget is under $2k (I will do all the work excluding porting/polishing). Before I dive off in this I would appreciate some suggestions / opinions (I know - that's asking for trouble ). Here is what I'm thinking...

EJ20K Heads - just stock, no porting, possible deal pending
Forged Pistons - what type? Can I use these? http://forums.nasioc.com/forums/show...hlight=pistons
ACL Bearings - still looking for the part number
EJ20G Head Gaskets - (I'm having trouble finding the part number in the system - but still looking)
ARP Head Studs - need to find the part number
TDO5 Turbo - send it off for a port/polish
USDM Oil Pump - ported
DW 650cc Injectors - from my EJ20G
Ider Pulleys / Belts / Seals / Gaskets - Duh
LinkG4 Ver1-6 EM (currently running my EJ20G)
Anything else I'm Missing?

Thanks in advance.

Matt M has some pistons that he said will work for the block, though you might be able to use the ones you have and just use new rings:

http://www.japanparts.com/db/partsli...=034-026-12033


You can also make a #3 thrust on the crank (maybe it was USDM crank mentioned though I thought it was the phase 1 crank mentioned) and use USDM Forged Pistons.


I saw a complete and I mean complete gasket set from a UK seller, though Rallitek has Gaskets for the EJ20K Heads.


Bearings Part Numbers and Makes=http://www.aclperformance.com.au/SubaruEJ20G.htm


Head Studs I'm almost positive are: 260-4701 used for EJ20/EJ22/EJ25/etc. engines


Head porting with the heads I have will net you as much or more flow than EJ207 heads which are considered the best heads out there so that'll be a major upgrade.


Maybe go with an 18G since it will net some major gains over the ported TDO5 or even a big 16G, while not being much different in terms of spool/lag. You can find a solid used 18G for $400-$500 or buy a new Evo III Big 16G from Blouch for I believe $650 right now.


Maybe some DW 790's since they are really cheap and practically a trade for the 650's you have. Larger never hurts.


Some photos of the closed block I was telling you about in case you wanted a freshly pulled one to work on along with freshly pulled heads.









Hopefully others will be in here for assistance, though Matt is definitely a guy of great knowledge in this arena as is Marnix.

Last edited by Audioexcels; 10-05-2009 at 06:40 AM.
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Old 10-05-2009, 10:13 PM   #3
beaviscih
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Member#: 123362
Join Date: Aug 2006
Chapter/Region: MWSOC
Location: Dorothy's House
Vehicle:
'93 Crapcan, '98L
Sold, '04 STi - Sold

Default

Thanks for the information. Send me pictures of the heads after you get them off the block.
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Old 10-06-2009, 02:16 AM   #4
Audioexcels
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Member#: 104824
Join Date: Jan 2006
Location: Here and There
Vehicle:
1996 EJ20G OBS
Black

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Quote:
Originally Posted by beaviscih View Post
Thanks for the information. Send me pictures of the heads after you get them off the block.
Sure will do.

And definitely email Matt Monson and Marnix. These two really know their stuff parts wise with pretty much all the engines, but especially a great database with the JDM stuff.
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