Sorry cant help on the M800. But it might be helpful to know that we did try the AEM CDI ignition together with the AEM ECU on my supercharged motor. Whilst the AEM ECU is a fantastic piece of equipment, the CDI unit didnt show any apparent benefit. We didnt have enough dyno time to really mess about, but removing it seemed to let the motor produce consistently better results. Things seemed a bit erratic with the CDI.
