I have been thinking lately that there may actually be a way to tune the ditech injection system with a Power Commander USB.
The PCIIIusb only looks at injection pulses and TPS reading...since the Ditech's injection system is propriatery and they will not let the secrets out of how to alter the stock mapping then we could just do like the car world and add a piggy-back box right? The PCIIIusb draws its power from the hot wire going to the injector and looks for something like ground interuptions to the other injection wire to build its mapping database against what signal it process from the Throttle Position Sensor (TPS). And then you can change the injection interval from your laptop...seems like it would work to me....and I am a sceptic....
So as long as the donor PCIIIusb was intended for a bike with a TPS signal in a range similar to the one on the Ditech's TPS we could be in business after a few wiring mods to attach the PC's ground wire and injector adapter...
Someone please tell me I am crazy and to forget about this! Like I need another project right now!
I have been reading through some technical articles about the Orbital injection system...Building a stand alone ecu that is tuneable is also possible if first you could determine the timing of the stock injection event, the duration of the event and the tps reading at which the event occured. The timing of the fuel injection event is increadibly important to allow the vaporization of as much of the fuel as possible in the pre-injection chamber. The timing of the air injection even is just really a function of the cam lobe shaped crank wheel and the air injection pump...probably beganning at about 85-95 degrees before top dead center and having about 10 degrees of duration...not sure on this one.
Basically the vast majority of the air that goes through the Ditech motor is not burned at all but rather heated by a small pocket of rich fuel/air mix provided from the pre-chamber during the primary injection (fuel and air) event. It is for this very reason that I have been able to operate the ditech fairly normally with the throttle body completley removed as long as the TPS was still hooked up. This motor is basically a lot more like a deisel than I had imagined.
What do you techie types think?