[Mitch P]

Here's an update.

We have started our preliminary on-vehicle testing with a Series 2 AEM EMS and we currently have a running engine with full control over the port injectors, ignition, quad cam control and 2step launch control. (soon DBW throttle control) So, for those that plan on getting rid of the DI system altogether, we should have a port injection only system ready very shortly. This kit will disable the factory traction control system since the stock ECU will have no longer have control of the throttle or ignition system to reduce engine power.

We are also interested in running the DI system and have begun research into controlling it through the S2 AEM. Right now, we are very optimistic that we'll be able to do it. Thankfully, the Denso DI driver box looks to be a relatively "stupid" driver box, in that it doesn't have any serial/CAN data lines to the stock ECU and is controlled entirely through timed PWM signals. This makes controlling the DI box much easier because you don't have to reverse engineer the system databus as far as control, error checking, etc... and then have to replicate it. It's very akin to a CDI system, which is just a high voltage power stage, where the ECU just needs to send it correctly timed signals and it does the rest.

The Denso DI driver box also contains a driver stage for the high pressure fuel pump's spill control valve, which controls the fuel rail pressure. Because of this driver stage, interfacing it to the AEM will be easier. The fuel pressure control is a bit interesting in that the cam lobe for the fuel pump has 3 lift events per engine cycle (three points of peak lift) from which you must also time your control signals for proper operation of the spill control valve.

We will be doing some further DI control testing in the near future with the AEM S2 box, but if we find that it is not feasible, we will concentrate our efforts more on the AEM Infinity kit for these cars, which is also under development.