rob wrote:
Thinking about it more, I don't think there would be any issues with this. ...... The fact that you have it working with a stock G ECU and Mike has my tune running on the dual igniter setup, that pretty much cements it. ..... It seems all you would need for a GD conversion is to run 4 wires from the ECU to the coils, +Batt to each coil (maybe tapped from the injectors?) and the ground wire to the mounting bolt. I don't know enough about the 22t coil pack to guess if the GD coils would give more output or not.
Our Legacies have the ECU mounted under the dash, over the pedals. For me the "correct" way to install the extra ignition channels is to pull the dash and fender, unwrap the harness and add the circuits, and then put it all back together. That's a ton of work, but likely worth it in the end. I did it on my winestone Legacy, but have not ran that conversion yet. I found the white car and haven't looked at the winestone in a long time.
I'm rehashing some info here, but I'm unaware how up-to-speed you are on the early Legacies.
The Legacy turbo used an 8 bit Hitachi ECU, however the pinouts are exactly the same as the EJ20G. The only exceptions are the 2 extra ignition channels, one sensor ground location (MAP), and a few diagnostic and misc wires that the EJ20G doesn't need/use.
On my white Legacy, I kept the wasted spark by using a simple ECU jumper harness and ignitors mounted inside the cabin. I cut ZERO wires and the mod is completely reversable. My write-up is a thread titled "4 channel ECU How-to". I have successfully used both an EJ20G Legacy ECU and an EJ20G Apexi Power FC on the stock EJ22T motor. I then used the exact same set-up on a proper EJ20G when the head gaskets on the EJ22T popped from user error induced boost spikes.
I've never had it on a dyno, because I don't consider myself a tuner and am just now getting a smal grasp on the concepts. I've done tons of tweaking to the PFC and feel I have a safe tune, however, I always planned to eventually get it tuned professionally. It never seems to come together regarding time, money and desire. That's the reason I'm interested in your tune. I'm to the point I just want it to work....nothing more.....nothing less. I want it to work like it came from the factory with 300HP.
I have a spare EJ22T ECU you can "have" for an extended period of time.
'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