Welcome to the North American Subaru Impreza Owners Club Tuesday September 19, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Engine Management & Tuning

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.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 07-16-2017, 07:01 PM   #1
Sir Francis
Scooby Newbie
 
Member#: 376979
Join Date: Dec 2013
Chapter/Region: International
Location: Chile
Vehicle:
2005 '05 WRX
Crystal Grey Metallic

Default 02' JDM WRX ECU ej205 (V7 sticker on ecu) with 05' ej205 WRX Engine.

Hello there!

As the title says, and giving more info, we have the whole ECU harness of a JDM 02' WRX (NB-R) installed on a car (that also has a 4C 4.44 gearbox) which original 02' JDM WRX NB-R engine died, and my buddy bought an 05' JDM WRX engine. My question is: will anything go wrong with the ECU or any thing to consider before connecting? I was wondering if AVCS are compatable among the GD chassis or if it will not work at all.

Any info will be appreciated!
* Registered users of the site do not see these ads.

Last edited by Sir Francis; 07-29-2017 at 07:01 PM.
Sir Francis is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 07-17-2017, 07:11 AM   #2
Titter
Scooby Specialist
 
Member#: 416107
Join Date: Mar 2015
Chapter/Region: International
Location: Ontario, Canada
Vehicle:
2002 WRX Wagon
EJ207 Spec C 4EAT

Default

if the 02 has avcs and the 05 has avcs, then you are fine, both are 16bit ECU's. you will need a tune of course.
Titter is offline   Reply With Quote
Old 07-17-2017, 06:34 PM   #3
Sir Francis
Scooby Newbie
 
Member#: 376979
Join Date: Dec 2013
Chapter/Region: International
Location: Chile
Vehicle:
2005 '05 WRX
Crystal Grey Metallic

Default

Quote:
Originally Posted by Titter View Post
if the 02 has avcs and the 05 has avcs, then you are fine, both are 16bit ECU's. you will need a tune of course.
Yep, we connected everything and the engine started right up without a problem, no CEL or whatsover.


But why you say tunning is required? Since most if not all the parameters are the same? Can you share a little bit of info about that?
Thanks a lot!
Sir Francis is offline   Reply With Quote
Old 07-17-2017, 10:13 PM   #4
Titter
Scooby Specialist
 
Member#: 416107
Join Date: Mar 2015
Chapter/Region: International
Location: Ontario, Canada
Vehicle:
2002 WRX Wagon
EJ207 Spec C 4EAT

Default

mapping might be a bit different throughout the years. its just a precaution. u dont need a full dyno tune, but check the map to make sure everything is running smooth.
Titter is offline   Reply With Quote
Old 07-18-2017, 07:58 AM   #5
ShinjiML
Scooby Specialist
 
Member#: 257231
Join Date: Sep 2010
Chapter/Region: Tri-State
Location: Hudson Valley, NY
Vehicle:
2011 STI ShinjiTuned
DGM

Default

Quote:
Originally Posted by Sir Francis View Post
Yep, we connected everything and the engine started right up without a problem, no CEL or whatsover.


But why you say tunning is required? Since most if not all the parameters are the same? Can you share a little bit of info about that?
Thanks a lot!
Jdm Ej205 runs 9:1 CR while the ej207 runs 8:1 CR, so the timing tables will be quite different, at least from low to mid loads. The ej207's timing in those regions will be too high for the jdm 205 motor. Fueling strategy is probably different as well due to the CR difference.

You'll need a full retune or the 205 motor could get a good amount of knock.

I don't have time to look at the maps right this moment and compare, but you'll probably find a good number of differences.


Edit: you'll need a tune either way because even running the jdm motors on USDM 93 octane usually results in Knocks in the higher rpm regions.

Last edited by ShinjiML; 07-18-2017 at 08:39 AM.
ShinjiML is online now   Reply With Quote
Old 07-18-2017, 09:21 AM   #6
Titter
Scooby Specialist
 
Member#: 416107
Join Date: Mar 2015
Chapter/Region: International
Location: Ontario, Canada
Vehicle:
2002 WRX Wagon
EJ207 Spec C 4EAT

Default

^ thats a better answer than mine
Titter is offline   Reply With Quote
Old 07-21-2017, 06:41 PM   #7
Sir Francis
Scooby Newbie
 
Member#: 376979
Join Date: Dec 2013
Chapter/Region: International
Location: Chile
Vehicle:
2005 '05 WRX
Crystal Grey Metallic

Default

Quote:
Originally Posted by ShinjiML View Post
Jdm Ej205 runs 9:1 CR while the ej207 runs 8:1 CR, so the timing tables will be quite different, at least from low to mid loads. The ej207's timing in those regions will be too high for the jdm 205 motor. Fueling strategy is probably different as well due to the CR difference.

You'll need a full retune or the 205 motor could get a good amount of knock.

I don't have time to look at the maps right this moment and compare, but you'll probably find a good number of differences.


Edit: you'll need a tune either way because even running the jdm motors on USDM 93 octane usually results in Knocks in the higher rpm regions.
Thanks for the clarification!

However, I've never mentioned an ej207 here mate. The whole ECU and its harness is from a JDM EJ205 WRX (NB-R) and the engine we installed is a JDM 05 EJ205 as well (WRX) not a STi as you refer to ej207 I assume. So it's an ej205 ecu with an ej205 engine, both JDM. Now we have monitored the engine with software and there's nothing wrong in it as far as we have checked with the laptop.

It eventually will get tuned as soon as a wideband arrives from the shop but no detonations or knocks detected so far.

By the way, I live in Chile, South America, and the highest octane here is 97 (Shell V-Power), lowest being 93 and the "ficticious" 95 which is a mix of both.
Edit: the car boost at 1.1bar peak then lowers itself to 0.9bar which should be normal for a stock setup w/ stock boost control solenoid.
Sir Francis is offline   Reply With Quote
Old 07-24-2017, 06:53 AM   #8
Titter
Scooby Specialist
 
Member#: 416107
Join Date: Mar 2015
Chapter/Region: International
Location: Ontario, Canada
Vehicle:
2002 WRX Wagon
EJ207 Spec C 4EAT

Default 02' JDM WRX ECU (V7) with 05' WRX Engine.

just to clarify:

the title says V7. (i know it also says wrx)

here in north america, "versions" only relate to STi models and not WRX's. so saying you have a V7 says you have a EJ207.

also half these people dont know what bar is let alone how to convert it.

1bar = 100kpa = 14.5psi = 14.2kg/cm2

sorry for any confusion.


also your gas is 97RON which is about 92OCT in north america.
Titter is offline   Reply With Quote
Old 07-29-2017, 06:58 PM   #9
Sir Francis
Scooby Newbie
 
Member#: 376979
Join Date: Dec 2013
Chapter/Region: International
Location: Chile
Vehicle:
2005 '05 WRX
Crystal Grey Metallic

Default

Quote:
Originally Posted by Titter View Post
just to clarify:

the title says V7. (i know it also says wrx)

here in north america, "versions" only relate to STi models and not WRX's. so saying you have a V7 says you have a EJ207.

also half these people dont know what bar is let alone how to convert it.

1bar = 100kpa = 14.5psi = 14.2kg/cm2

sorry for any confusion.


also your gas is 97RON which is about 92OCT in north america.
Yep, I guess it was some sort of "misleading" title as I wanted to say that the sticker on the ECU says V7...I wasn't referring to a a V7 sti lol. So yep, sorry on that!

Anyways, the car is just normal and acts as it should. However I'm still in doubt if the engine has AVCS or not, can't figure out that but I'll post info on another section of the forum.

Just a little bit off-topic: which is the highest rating on OCTANE over the US? Just asking that because we don't have a higher oct rate than that down here and that's the "premium" we have, no more. I wonder if it would have problems with the car ignition or something related.

Anyways we are tunning tomorrow and I hope to post more results.

Edit: is it boosting "normally" for a stock setup?

Thanks Titter!
Sir Francis 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

All times are GMT -4. The time now is 10:25 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.