»  BC-BF Legacy Discussion »  Electrical
#Adapting an EJ20G ECU

Custom Search
Login | Register




Post new topic Reply to topic  [ 67 posts ]  Go to page Previous  1, 2, 3  Next
Author Message
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Wed Sep 01, 2010 8:53 pm 
First Gear
Joined: Thu Jun 26, 2003 5:44 pm
Posts: 183
Location: Puyallup WA
My goal is to have fabbed PCBs by next week. It may take another few days to assemble. That is the best case.

-Rob


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Tue Nov 09, 2010 10:09 pm 
Second Gear
Joined: Sun Jun 15, 2008 4:40 am
Posts: 306
Location: Ellensburg, Wa
hey rob,

can you show us how to make the 20g ecu fit in the stock legacy location please :D

_________________
VF43 custom FMIC APEXI intake Invidia 3" TBE JDM Ver. 4 RA STi trans (4.44) SPT short shifter rear LSD WRX rear axels coilover suspension JDM 4-pot front brakes drilled slotted rottors Greddy EBC tuned 20G ECU sti 550cc injectors Jecs MAF walbro 255


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Tue Nov 09, 2010 11:55 pm 
Fifth Gear
Joined: Mon Nov 06, 2006 3:41 am
Posts: 8352
Location: Tenino, WA
Zip ties is how I had to do mine. I also had to saw off the mounting bracket that came on the EJ20G ECU because it didn't allow it to fit up in there.

_________________
98 Metro Hatch Daily Driver :)
91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Wed Nov 10, 2010 5:11 am 
Second Gear
Joined: Sun Jun 15, 2008 4:40 am
Posts: 306
Location: Ellensburg, Wa
I did that, wasn't to crazy about trying to remove the ECU board, works good and is out of my way now so I can actually drive the car comfortably. :D

_________________
VF43 custom FMIC APEXI intake Invidia 3" TBE JDM Ver. 4 RA STi trans (4.44) SPT short shifter rear LSD WRX rear axels coilover suspension JDM 4-pot front brakes drilled slotted rottors Greddy EBC tuned 20G ECU sti 550cc injectors Jecs MAF walbro 255


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Wed Nov 10, 2010 3:31 pm 
Fifth Gear
Joined: Fri Jun 20, 2008 8:17 am
Posts: 6287
Location: Lakewood, Wa 98439
i don't know if this has been covered in this post or any post on here, but will the 20G board fit in the turbo ecu housing?

_________________
91 L-TW Wagon with a full Swap -RIP
92 SS Prefaced, GD dash swapped, 22T/205 Hybrid 20 psi - BEAST!
93 SS Bone Stock Gone!
94 TW Bone Stock Gone!
91 SS 4EAT Sold!
98 LGT 4EAT
98 LGT Wagon 4EAT


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Wed Nov 10, 2010 5:03 pm 
Second Gear
Joined: Thu Nov 23, 2006 1:07 am
Posts: 454
Location: Maine
no

_________________
94 Supra Turbo 6 speed. build in progress
98 Lexus GS300, single turbo 2JZGTE swap. daily driver
93 Impreza wagon, home brewed n/a-t ken block themed winter drift missle

*sold*
94 Alpine Sport Wagon... STi conversion, rotated turbo etc


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Wed Nov 10, 2010 6:55 pm 
Fourth Gear
Joined: Thu Aug 11, 2005 4:34 pm
Posts: 1980
Location: Lake Elsinore, CA
The EJ22T turbo ECU is a Hitachi and the Hitachi housing and not compatable with the EJ20G ECUs.

*SOME* non-turbo ECUs are JECS and close relatives of the EJ20Gs. I have not found any that are 100% compatable, but the work to make one fit should not be extensive. When I get back to my SS, it's one of the projects I have planned.

_________________
'93 Winestone SS Auto, '91 Pearl White SS.
'93 Pure White SS EJ20G slanty intercooled, SIDESWIPED! In stasis.
'94 FWD and '95 AWD Laguna Blue SVXs.
2017 Pure Red BRZ Limited w/Performance pack


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Wed Nov 10, 2010 9:09 pm 
Fifth Gear
Joined: Mon Nov 06, 2006 3:41 am
Posts: 8352
Location: Tenino, WA
cj91legss wrote:
i don't know if this has been covered in this post or any post on here, but will the 20G board fit in the turbo ecu housing?


Nope, I tried that before cutting the bracket off my EJ20G ECU.

_________________
98 Metro Hatch Daily Driver :)
91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Thu Nov 11, 2010 7:26 am 
Second Gear
Joined: Sat Mar 03, 2007 8:10 am
Posts: 321
Location: arvada co
cj91legss wrote:
rob wrote:
I have seen them on ebay, but for something like $130. It's really looks to be a small number of changes (5 + the ignition changes). You could do this in a way that would make swapping back to stock pretty easily.

-Rob


A person could just go to a junk yard and snip out the ecu connectors and grab the ecu from an N/A and make their own harnes.




I've done this and its a b^^^^



Rob do you by chance have a ej20g ecu???

_________________
91 SS, v9 ej207 twin scroll swap, Gda wrx dash swap.
2002 wrx sport wagon


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Fri Nov 12, 2010 1:54 am 
First Gear
Joined: Thu Jun 26, 2003 5:44 pm
Posts: 183
Location: Puyallup WA
Indeed I do have a spare EJ20G ECU.

As for fitting the ECU, I will post pictures how I did it. Basically I used the top half of the G case and the bottom half of the 22T case.

-Rob


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Fri Nov 12, 2010 1:55 am 
Fifth Gear
Joined: Mon Nov 06, 2006 3:41 am
Posts: 8352
Location: Tenino, WA
Does the ECU use the body of the ECU as a grounding point?

_________________
98 Metro Hatch Daily Driver :)
91 SS EJ20G Engine/Tranny/Diff Swap Build Thread Here
"Your testes are close to your bottom but you still play with them all the time." Jeremy Clarkson


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Fri Nov 12, 2010 5:32 am 
First Gear
Joined: Thu Jun 26, 2003 5:44 pm
Posts: 183
Location: Puyallup WA
Nope.


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Fri Nov 12, 2010 5:38 pm 
First Gear
Joined: Thu Jun 26, 2003 5:44 pm
Posts: 183
Location: Puyallup WA
Added case pictures to the first post.


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Tue Jan 04, 2011 7:38 am 
First Gear
Joined: Mon Nov 16, 2009 5:49 am
Posts: 176
Location: socal
any updates on IGNITION CHANGE???


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Thu Jan 27, 2011 7:24 pm 
First Gear
Joined: Thu Jun 26, 2003 5:44 pm
Posts: 183
Location: Puyallup WA
updated ignition section.


Profile  Offline
Reply with quote  
 Post subject: Re: Re: Adapting an EJ20G ECU
PostPosted: Fri Jan 28, 2011 9:02 am 
Second Gear
Joined: Sat Mar 08, 2003 6:53 am
Posts: 355
Location: Western Nevada
rob wrote:
updated ignition section.


Very, very interesting and encouraging. I would love to swap out my 440's and vf8 for 550's and vf43 if this swap and tuning proves feasible.

Sent from my ADR6300 using Tapatalk

_________________
1991 SS build thread: viewtopic.php?t=40430


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Fri Jan 28, 2011 5:08 pm 
Second Gear
Joined: Thu Nov 23, 2006 1:07 am
Posts: 454
Location: Maine
its very feasible. it took me less then 2 hours to add a second igniter and keep my stock coil pack. 290whp on this setup, id say its worth it.

_________________
94 Supra Turbo 6 speed. build in progress
98 Lexus GS300, single turbo 2JZGTE swap. daily driver
93 Impreza wagon, home brewed n/a-t ken block themed winter drift missle

*sold*
94 Alpine Sport Wagon... STi conversion, rotated turbo etc


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Sat Jan 29, 2011 12:16 am 
Fifth Gear
Joined: Fri May 04, 2007 4:09 pm
Posts: 2253
Location: N. ID
EDIT: The JECS-labeled case from a '92-'94 NA/non-turbo Legacy ECU works well w/the EJ20G's ECU board (not the '90-'91). The screws on the side match up and hold it in place like stock.



Thanks for the ignition info....and the LINK to Rob's NASIOC write-up on converting an old EJ20G coil on plug (CoP) to work with '02+ WRX ignition coils (this isn't the EJ22T Wasted Spark>>CoP).

_________________
Turbo Subies:
'87 GL-10 Turbo 4WD Wagon (pre-Loyale) - SOLD
'90 BJ, EJ22T/DOHC and 5-speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX GG-SOLD
'96 BD - turbo'd-SOLD


Last edited by wtdash on Wed Jan 01, 2014 6:49 am, edited 2 times in total.

Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Wed Feb 02, 2011 8:41 pm 
First Gear
Joined: Thu Jun 26, 2003 5:44 pm
Posts: 183
Location: Puyallup WA
I have updated the igntion section. I was asked a very basic question that I had not considered.....will the COP coils actually fit in the EJ22T heads? I have no idea :)

So option 1 of the ignition change over is on hold until this can be verified. Anybody with experience want to add their thoughts?

-Rob


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Thu Feb 03, 2011 7:10 pm 
Site Admin
Site Admin
Joined: Tue Oct 15, 2002 11:37 am
Posts: 27267
Location: Houston, Tx
I have my doubts the WRX style COP will fit. Here's a picture I found with a quick search.

http://media.photobucket.com/image/suba ... G_1860.jpg

You might be able to get them to work, but I think you'd be better off using an off-mounted coil/ignitor combo and then run short plugs.

_________________
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
1997 Impreza OBS

If you need to get a hold of me please email me rather then pm


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Fri Feb 04, 2011 11:41 pm 
Fifth Gear
Joined: Mon Mar 08, 2004 2:30 am
Posts: 2275
Location: Auburn, WA
If you have WRX plugs, you can always come by and test fit. ( You have to PM and call first of course)

_________________
Yes I have too many Subarus
No you can't have one
05 GD-STI
01- RS- Swapped-07 STI
00- GF
93 SS- "the original Robtune" (now in new hands)


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Sat Feb 05, 2011 4:09 am 
Fourth Gear
Joined: Thu Dec 24, 2009 1:24 am
Posts: 1173
Location: Lynnwood, Wa.
Rob did you get my email/pix?

_________________
1994 Legacy Sport Sedan.
1991 Legacy Sport Sedan.


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Sat Feb 05, 2011 5:39 am 
Third Gear
Joined: Mon Apr 26, 2004 4:20 am
Posts: 698
Location: Calgary, Canada
Just checked again tonight, WRX coils will not work on our stock heads. The coil portion is too big to fit in such a tight area, also the angle inst helping anything.

_________________
1994 ABM Sport Sedan-Not stock
1990 L series/turbo-Rally project


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Sat Feb 05, 2011 6:52 pm 
First Gear
Joined: Sun Mar 01, 2009 2:52 am
Posts: 170
Location: Denver
I have some EJ20R coils and head covers. Doesn't look like they'll fit at all to me.

_________________
91 SS with a bunch of parts waiting on the shelf
94 SS with things and such
08 STI with stuff and junk


Profile  Offline
Reply with quote  
 Post subject: Re: Adapting an EJ20G ECU
PostPosted: Wed Feb 09, 2011 5:13 am 
First Gear
Joined: Thu Jun 26, 2003 5:44 pm
Posts: 183
Location: Puyallup WA
Florin did a test fit on both his EJ22T and EJ25D heads. From the pictures, it looks like it *might* be possible for them to work on the EJ22T heads, but it would depend on if they are long enough to seat on the spark plug and some sort of custom hold down bracket would have to be made.

For the EJ25D head they fit as expected.

The EJ20R/H heads should work as well, but you will have to modify the coil bodies a little bit. This is the same as the early Legacy EJ20G versions. You can tell those because they have 2 bolts instead of one holding the coil in place.
http://forums.nasioc.com/forums/showpos ... tcount=213
http://forums.nasioc.com/forums/showpos ... tcount=216

I will update the first post to reflect this info.

-Rob


Profile  Offline
Reply with quote  

Display posts from previous:  Sort by  

Post new topic Reply to topic  [ 67 posts ]  Go to page Previous  1, 2, 3  Next


Who is online

Users browsing this forum: No registered users and 1 guest

Panel

Top You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
Search for:
Jump to:  

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Dizayn Ercan Koc