Special thanks to Cossie, BarryC, and Todd-W over at OpenECU.org for helping me through the swap. Here are the details.

First, compare the USDM Evo 8 pinout to the Evo 6 TME:






Based on the pinout comparison, the follow harness changes are necessary:

Swap pins 8 and 22
Connect 31 from the ECU to 34 on the vehicle harness
Connect 31 from the ECU to 20 on the vehicle harness
Connect 32 from the ECU to 21 on the vehicle harness
Disconnect pin 87

I used a patch harness to make the changes and not have to cut the actual vehicle harness. All connections were soldered and then protected with heat shrink tubing. Any flying leads remaining were folded over and shrink tubed as well. Here are pictures of the work:







Once the harness was finished, I needed the proper ROM for the ECU. BarryC provided a JDM Evo 8 GSR ROM file and xml definitions with the rear O2, EGR, and immobilizer disabled.

My TME fired up right away, and has thrown no codes. I took it immediately over to our emissions station, where it passed their ODBII check. (The emissions test started me down this path in the first place. The Evo 6 TME ECU would not talk to the emission station computer via the OBDII port.)

Very happy to have the swap complete, and can't wait to start logging and tuning.

Thanks again,
Tim

 

nice... I have an evo 8 ECU on an evo 7 engine in an evo 6. I did have a problem, that was the immobilizer. I used the tatrix and the OpenECU software to disable it.
You can able to swap evo 8 and 7 ecu to the CP9A IV, V, and VI but can't swap the old version to the current CT9A.

 

Thanks Tachyon.

I just noticed I posted this in the wrong forum. Mods please move as appropriate. Thanks.

 

Nice work. Are you the first to do this?

 

congrats.

 

I think I met you at DTM, hope you get that leak fix, your TME evo is really clean! Congrats on the swap.

 

pics!

 

Well once your ready for big power then you can upgrade to a AEM then you will be set.

 

why are u connecting pin 31 to two different pins on the vehicle harness?

 

It has been done many times already. I have converted 6 cars myself and many have done it in the UK also.

 

That's a mistake.

 

what is the benefit of this?

 

For most people it would be so they can flash their ECU. The earlier Evo stock ECU's can only be flashed by EcuTek dealers.

 

whats the advantage of using a e8 ecu on a e7 engine?

 

Many have done it with the EDM and JDM ECUs but as far as I know, this is the first USDM 8 Ecu swap into the Evo 6. The pinouts are slightly different between them.