adapting a EJ20g Robtune to a 1993 SS

Headlights to tailights and everything in between.

Moderators: Helpinators, Moderators

Post Reply
xbmxxx
In Neutral
Posts: 31
Joined: Tue Apr 15, 2014 1:34 am

adapting a EJ20g Robtune to a 1993 SS

Post by xbmxxx »

I am going over this thread reading about ignition converters

http://bbs.legacycentral.org/viewtopic.php?f=19&t=47252

However, I have a JDM 20G intake manifold complete with the COP ignition. Will this intake plug in to my harness and not need an ignition converter?
Legacy777
Site Admin
Site Admin
Posts: 27889
Joined: Tue Oct 15, 2002 11:37 am
Location: Houston, Tx
Contact:

Re: adapting a EJ20g Robtune to a 1993 SS

Post by Legacy777 »

To my knowledge the stock SS wiring harness does not have the extra wires for the COP setup. You also need a four channel igniter and would need to run two extra wires from the ECU to the igniter, and then run the wiring from the igniter to the COP.
Josh

surrealmirage.com/subaru
1990 Legacy (AWD, 6MT, & EJ22T Swap)
2020 Outback Limted XT

If you need to get a hold of me please email me rather then pm
wtdash
Fifth Gear
Posts: 2346
Joined: Fri May 04, 2007 4:09 pm
Location: N. ID

Re: adapting a EJ20g Robtune to a 1993 SS

Post by wtdash »

Hi,
Get the Ignition converter from Rob and you can run either an EJ22T or EJ20G ECU, per Rob. And you'll need the matching parts for the ECU - injectors, MAF, etc. and make the minor wiring changes (noted in my Thread) if it's the EJ20G ECU.

But you don't need the extra COP wiring or igniters.

TD
Turbo Subies:
'87 GL-10 Turbo - SOLD
'90 BJ EJ22T/DOHC & 5speed swap - SOLD
'04 FXT, Forged internals, VF39, STI TMIC, Cobb AP- SOLD
'93 Legacy SS - 5-speed, SOLD :-(
'02 WRX -SOLD
'96 BD-turbo'd-SOLD
'98 SF - NA-T
robertpaige
Fourth Gear
Posts: 1232
Joined: Tue Jul 31, 2012 10:32 pm
Location: Portland, Oregon.

Re: adapting a EJ20g Robtune to a 1993 SS

Post by robertpaige »

Rob's converter is honestly the cleanest way to go.
the guy who had the really low winestone SS on the corvette wheels
James614
Fourth Gear
Posts: 1744
Joined: Sun Jun 10, 2007 4:35 am
Location: Arkansas

Re: adapting a EJ20g Robtune to a 1993 SS

Post by James614 »

I did the COP conversion, and while it wasn't that hard, if I did it again I'd go with the ignition converter honestly.

If you do want to run COP, I'd strongly recommend getting 02-05 WRX coil packs which allow you to bypass the ignitor entirely. This is actually much easier than trying to tie the stock 4ch ignitor into the system without a complete harness. Hell, I had a complete harness and and t was still easier to run the GD coils.
93 Touring Wagon (EJ20G 5spd Swap) -- Finally back and running strong as ever!

05 Outback 2.5XT 5spd -- Now the wife can have her SUV and get in on the turbo Legacy goodness at the same time.
jessman1942
First Gear
Posts: 121
Joined: Mon Jan 20, 2014 10:13 pm
Location: Spokane WA

Re: adapting a EJ20g Robtune to a 1993 SS

Post by jessman1942 »

James614 wrote:I did the COP conversion, and while it wasn't that hard, if I did it again I'd go with the ignition converter honestly.

If you do want to run COP, I'd strongly recommend getting 02-05 WRX coil packs which allow you to bypass the ignitor entirely. This is actually much easier than trying to tie the stock 4ch ignitor into the system without a complete harness. Hell, I had a complete harness and and t was still easier to run the GD coils.


is their a guide to this conversion anywhere using GD coils?
88 Honda civic wagon B20VTEC SWAP-RIP
85 Subaru loyal sedan-SOLD
95 Subaru impreza $500 BEATER-SOLD
91 Subaru legacy SS jdm ej20g swap

CHECK OUT MY ej20G BUILD HERE>> viewtopic.php?f=25&t=53766
James614
Fourth Gear
Posts: 1744
Joined: Sun Jun 10, 2007 4:35 am
Location: Arkansas

Re: adapting a EJ20g Robtune to a 1993 SS

Post by James614 »

Here's Rob's writeup explaining how to do it on his Impreza RS with an EJ20G swap:
http://forums.nasioc.com/forums/showthr ... ?t=1192028

EDIT: Kimo wrote a very good writeup that's specific to our cars: http://bbs.legacycentral.org/viewtopic.php?f=19&t=53990
93 Touring Wagon (EJ20G 5spd Swap) -- Finally back and running strong as ever!

05 Outback 2.5XT 5spd -- Now the wife can have her SUV and get in on the turbo Legacy goodness at the same time.
Post Reply