Welcome to the North American Subaru Impreza Owners Club Friday December 13, 2019
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo)

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 04-06-2006, 10:39 PM   #1
wrxfactor
Scooby Specialist
 
Member#: 49978
Join Date: Dec 2003
Chapter/Region: NESIC
Location: Shrewsbury, MA
Vehicle:
2002 WRX w/ JDM STi
6spd, EJ255, VF39 & EWG

Default JDM EJ20 Specs

Hey guys, I'm having a JDM EJ20 (from an 05 WRX) swapped into my WRX after having an engine problem, and I'm just looking to get some specs on it.

I know it's still a 2.0L open deck, and makes 246chp instead of the 227chp out of the USDM. I believe redline is the same, but I'm unsure.

It also has AVCS heads, so I was wondering if it was worth it to get a JDM ECU or get a standalone down the road to support this.

I remember hearing something about a higher compression ratio, and was wondering what that would do for my numbers. I currently have a gutted stock UP, Bosal DP, and Bosal catback, and a TXS unichip that I will possibly be hooking up soon.

So anyone that has any true specs for this motor, post 'em here please

Thanks,
Chris

Last edited by wrxfactor; 04-06-2006 at 11:03 PM.
wrxfactor is offline   Reply With Quote
Old 04-06-2006, 11:03 PM   #2
moss
Scooby Guru
 
Member#: 10197
Join Date: Sep 2001
Chapter/Region: MAIC
Location: Gtown, MD
Default

It doesnt have a low compression ratio, it has a slighly high compression ratio. 9:1 . I have a MY02 JDM WRX EJ205. Your other specs are correct, though I was told 250chp. Redline is whatever the WRX is (7000-7200? Not sure I'm comming from a 2.5RS).

And yes AVCS heads. I got a JDM ECU with mine, so I'll be using it.

Keith
moss is offline   Reply With Quote
Old 04-06-2006, 11:04 PM   #3
wrxfactor
Scooby Specialist
 
Member#: 49978
Join Date: Dec 2003
Chapter/Region: NESIC
Location: Shrewsbury, MA
Vehicle:
2002 WRX w/ JDM STi
6spd, EJ255, VF39 & EWG

Default

Keith, just found out about the compression, and edited the post. Is it any more responsive to mods with the higher compression or no?
wrxfactor is offline   Reply With Quote
Old 09-26-2018, 07:57 PM   #4
subaru_gc8
Scooby Specialist
 
Member#: 29292
Join Date: Nov 2002
Chapter/Region: SCIC
Location: Orange County CA
Vehicle:
2004 WRX wagon
silver

Default

nevermind
subaru_gc8 is offline   Reply With Quote
Old 04-06-2006, 11:09 PM   #5
moss
Scooby Guru
 
Member#: 10197
Join Date: Sep 2001
Chapter/Region: MAIC
Location: Gtown, MD
Default

Honestly. I'm not sure yet. My swap is still in the process of being finished (stupid wiring )

I would think with the higher compression ir would allow the turbo to spool faster and require less boost. But I'm still a n00b to turbos and what not.
moss is offline   Reply With Quote
Old 04-12-2006, 04:52 PM   #6
petawabit
Scooby Specialist
 
Member#: 18978
Join Date: May 2002
Chapter/Region: SCIC
Location: orange county, CA
Vehicle:
96 brighton
05 AP2 ,09 GE8

Default

Quote:
Originally Posted by moss
Honestly. I'm not sure yet. My swap is still in the process of being finished (stupid wiring )

I would think with the higher compression ir would allow the turbo to spool faster and require less boost. But I'm still a n00b to turbos and what not.
Hurry up! The higher compression is nice. the jdm ej205 is a beast
petawabit is offline   Reply With Quote
Old 04-12-2006, 02:06 PM   #7
michaelpatrick
Scooby Newbie
 
Member#: 101004
Join Date: Nov 2005
Chapter/Region: Tri-State
Location: NJ
Vehicle:
2002 WRX

Default

I though I had heard that the JDM ej20 has a redline of something like 8500, and that is why it is so appealing to us?
michaelpatrick is offline   Reply With Quote
Old 04-12-2006, 02:12 PM   #8
moss
Scooby Guru
 
Member#: 10197
Join Date: Sep 2001
Chapter/Region: MAIC
Location: Gtown, MD
Default

the JDM EJ207s have better heads. Not the JDM EJ205s... read up.
moss is offline   Reply With Quote
Old 04-12-2006, 04:06 PM   #9
wrxfactor
Scooby Specialist
 
Member#: 49978
Join Date: Dec 2003
Chapter/Region: NESIC
Location: Shrewsbury, MA
Vehicle:
2002 WRX w/ JDM STi
6spd, EJ255, VF39 & EWG

Default

Quote:
Originally Posted by moss
the JDM EJ207s have better heads. Not the JDM EJ205s... read up.
Yuo, and the redline for the EJ207 is 8k rpm.
wrxfactor is offline   Reply With Quote
Old 04-12-2006, 04:46 PM   #10
skiblur
Scooby Specialist
 
Member#: 48291
Join Date: Nov 2003
Chapter/Region: MWSOC
Location: Ann Arbor, MI
Vehicle:
02 EJ207RA/JDM6
Still truckin'

Default

ah, good call on the jdm wrx motor. I'm not sure why more people don't get them instead of rebuilding ej205's, considering the price that they go for. The compression is 9:1. They have cast or hypernautic pistons, not forged like the sti v7. I believe the pistons have the same construction as the JDM v8 sti. The heads have avcs, which means a jdm ecu controls them. AVCS is the shiz. You want it. Get a jdm ecu to run them. redline is 7200 on the motor. so you know, avcs will lower spool by 3-500 rpms when tuned. It is a solid motor, and a nice performance bump over the standard WRX motor. Great motor for the stg 4 guys. the comp ratio will be fun. Get a reflash for 93 octane and a vf series turbo and enjoy most of what the STi motor is, without the 8k redline.
Hope this answers some questions. I A performance sells a premade avcs harness. I wired my own and it took about an hour, and I'm not wiring savvy.
you could probably use a jdm sti ecu, somewhere could flash it for you.
good choice on the motor. you should be paying between 16-1900 max for the motor, with low milage.
If I can answer any other questions, let me know.
H.
skiblur is offline   Reply With Quote
Old 04-12-2006, 07:00 PM   #11
JRSCCivic98
Scooby Specialist
 
Member#: 67080
Join Date: Jul 2004
Default

Quote:
Originally Posted by skiblur
I A performance sells a premade avcs harness.
Anymore info on this? I checked their site, but it looks like they are either redoing it or there's no info for anything on it. Anyway, do you happen to have a price or anything of that type of info?
JRSCCivic98 is offline   Reply With Quote
Old 04-13-2006, 12:27 AM   #12
wrxfactor
Scooby Specialist
 
Member#: 49978
Join Date: Dec 2003
Chapter/Region: NESIC
Location: Shrewsbury, MA
Vehicle:
2002 WRX w/ JDM STi
6spd, EJ255, VF39 & EWG

Default

Quote:
Originally Posted by JRSCCivic98
Anymore info on this? I checked their site, but it looks like they are either redoing it or there's no info for anything on it. Anyway, do you happen to have a price or anything of that type of info?
I googled and tried to click the link for them and it didn't work, but I clicked the "cached" link and it showed it for $150.00, but it's for a JDM ECU ALSO. As I'm using a USDM ECU, that might be a problem. I'll be contacting them soon though, and I'll let you guys know.

moss, question for you. I believe they are capping a hose or something to do with a coolant line in the rear of the motor near the flywheel. Is there any issue with this, or is it supposed to be hooked up somewhere?
wrxfactor is offline   Reply With Quote
Old 04-04-2016, 02:05 AM   #13
Nuunchi
Scooby Newbie
 
Member#: 419049
Join Date: Apr 2015
Default

so quick question. How much is the ej205 capabile of? How much boost should I be pushing with my vf23 and how much should I push this motor?
Nuunchi is offline   Reply With Quote
Old 09-26-2018, 07:06 PM   #14
trueno92
Scooby Specialist
 
Member#: 111755
Join Date: Apr 2006
Default

Quote:
Originally Posted by skiblur View Post
ah, good call on the jdm wrx motor. I'm not sure why more people don't get them instead of rebuilding ej205's, considering the price that they go for. The compression is 9:1. They have cast or hypernautic pistons, not forged like the sti v7. I believe the pistons have the same construction as the JDM v8 sti. The heads have avcs, which means a jdm ecu controls them. AVCS is the shiz. You want it. Get a jdm ecu to run them. redline is 7200 on the motor. so you know, avcs will lower spool by 3-500 rpms when tuned. It is a solid motor, and a nice performance bump over the standard WRX motor. Great motor for the stg 4 guys. the comp ratio will be fun. Get a reflash for 93 octane and a vf series turbo and enjoy most of what the STi motor is, without the 8k redline.
Hope this answers some questions. I A performance sells a premade avcs harness. I wired my own and it took about an hour, and I'm not wiring savvy.
you could probably use a jdm sti ecu, somewhere could flash it for you.
good choice on the motor. you should be paying between 16-1900 max for the motor, with low milage.
If I can answer any other questions, let me know.
H.
Really doing the necrobump


RE: AVCS
Does ANYONE have the wiring pinout and what the engine side of the harness looks like?
trueno92 is offline   Reply With Quote
Old 11-05-2019, 08:41 PM   #15
Daymonslegacy
Scooby Newbie
 
Member#: 508063
Join Date: Nov 2019
Default

Hey so new to the forum I bought a jdm ej205 and plan on using a standalone ecu I plan on using the AVCS now could someone tell me what all I need to make it run I hear about the cam and crank sensors need to be switched to USDM ones does and body know where I can find the intake wiring harness to ecu pin outs

Thanks for the help
Daymonslegacy is offline   Reply With Quote
Old 04-12-2006, 04:53 PM   #16
petawabit
Scooby Specialist
 
Member#: 18978
Join Date: May 2002
Chapter/Region: SCIC
Location: orange county, CA
Vehicle:
96 brighton
05 AP2 ,09 GE8

Default

Quote:
Originally Posted by moss
the JDM EJ207s have better heads. Not the JDM EJ205s... read up.
the jdm ej205 heads are still pretty big in terms of intake port. More so than the US sti
petawabit is offline   Reply With Quote
Old 04-12-2006, 07:06 PM   #17
moss
Scooby Guru
 
Member#: 10197
Join Date: Sep 2001
Chapter/Region: MAIC
Location: Gtown, MD
Default

Quote:
Originally Posted by petawabit
the jdm ej205 heads are still pretty big in terms of intake port. More so than the US sti
REALLY? The older ones? the A type ? Production 8/00-9/01?

Super 16g here I come

keith
moss is offline   Reply With Quote
Old 04-29-2011, 08:59 PM   #18
nedalrabadi
Scooby Newbie
 
Member#: 244358
Join Date: Apr 2010
Chapter/Region: International
Location: JORDAN
Vehicle:
1996 impreza
orange & black

Default

what about the JDM EJ20X in the LEGACY 2.0 GT STI
nedalrabadi is offline   Reply With Quote
Old 03-28-2015, 03:14 PM   #19
JMlegacy
Scooby Specialist
 
Member#: 341649
Join Date: Dec 2012
Chapter/Region: International
Location: Sun City
Default

Quote:
Originally Posted by nedalrabadi View Post
what about the JDM EJ20X in the LEGACY 2.0 GT STI
Your question is years old, but for those wondering, the EJ20x/EJ20y
has big port heads with quad avcs.

The bigger port in this pic is that of the Ej20Y. The other is the USDM STI 257


Buy the heads off a Ej20x if u get it for cheap, then slap on a build bottom end and make power. Rev to 7500, this is redline for ej20Y
JMlegacy is offline   Reply With Quote
Old 03-26-2015, 08:05 PM   #20
Joshields54
Scooby Newbie
 
Member#: 411615
Join Date: Jan 2015
Default

I know this is an old post but anyone know if the jdm ej205 comes with a slightly different turbo. Or is it exactly the same
Joshields54 is offline   Reply With Quote
Old 03-28-2015, 12:14 AM   #21
jackassofalltrades
Scooby Newbie
 
Member#: 309550
Join Date: Feb 2012
Chapter/Region: MWSOC
Location: Ohio
Vehicle:
UNIQ 15' WRX Limited
Galaxy Blue Pearl

Default

Same TD04-13T Turbo as the USDM.
jackassofalltrades is offline   Reply With Quote
Old 10-18-2015, 05:21 AM   #22
bilbo93
Scooby Newbie
 
Member#: 317073
Join Date: Apr 2012
Default

They actually come with a td04 HL turbo which is slightly bigger than the usdm models. Dont want anyone misinformed from previous posts.
bilbo93 is offline   Reply With Quote
Old 12-11-2015, 11:04 PM   #23
OneManArmy
Scooby Specialist
 
Member#: 36154
Join Date: May 2003
Location: Santa Cruz County
Vehicle:
2004 WRX Wagon
White

Default

Are people not aware that all EJ205's are NOT AVCS?
OneManArmy is offline   Reply With Quote
Old 12-13-2015, 11:18 AM   #24
bilbo93
Scooby Newbie
 
Member#: 317073
Join Date: Apr 2012
Default

Quote:
Originally Posted by OneManArmy View Post
Are people not aware that all EJ205's are NOT AVCS?

Jdm models came with single avcs
bilbo93 is offline   Reply With Quote
Old 12-13-2015, 11:40 AM   #25
El Guapo
Scooby Newbie
 
Member#: 234937
Join Date: Jan 2010
Chapter/Region: SWIC
Location: NM
Vehicle:
2004 STi
20G'd Blue

Default

Quote:
Originally Posted by OneManArmy View Post
Are people not aware that all EJ205's are NOT AVCS?
I think you are unaware that some JDM EJ205s have AVCS.
El Guapo is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Differences between JDM V9 STI, JDM V9 Spec-A/B/C, & JDM V8 Spec-C (Heads)??? nomorem3 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 16 04-06-2013 09:57 PM
domestic ej20 versus JDM ej20 subenick Subaru Conversions 15 03-22-2004 07:00 PM
Differences between US EJ20 and JDM EJ20? Lee Chun Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 3 01-03-2004 09:35 PM
Using a usdm ej20 block with jdm ej20 bottom end, whats the block diffrence with sti Turbo Tin Can Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 2 12-02-2003 04:13 AM
Need JDM EJ20 Legacy Motor Specs from the past MY99 2.5GT Legacy Forum 4 05-09-2003 11:44 AM

All times are GMT -4. The time now is 10:39 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.