1. Will the pcm still pull timing in event of detonation?
Yes. The pcm control is still there, the timing module is just making calculations of the existing timing signal, therefore the pcm is setting the 'base' timing.
2. Why use two maps that controls fuel?
Well, the airflow map is good to get the system close, but it is less precise for control of fuel delivery. Consider that the MAF is still an 'input' sensor which can be modified or overridden by the pcm.
Lengthening the injector pulse-width is a very simple and precise way to add fuel at specific points. It is also an 'output' signal to the injectors so the pcm can not override the signal. The only way it can modify the added injector pulse width is during closed loop operation where the pcm uses the O2 sensors to calculate rich/lean conditions. It can then reduce the 'base' injector pulse-width.
3. Are any Maps a function of throttle position?
Yes, The airflow map is a function of throttle position, but the injector and timing maps are functions of rpm and airflow. This is because you don't want to advance timing at some % throttle because the airflow isn't always proportional. This safeguards the engine by adding fuel, or changing timing only when there is sufficient air.
I agree with your last statements that the chips are still valuable to move limiters for speed and rpm. The eManage cannot do that.
I think these very detailed and probing questions have finished illustrating the important points of the eManage, thanks.
As an update, I have been running this thing since the end of February and I have no bad things to say about it. The flexibility is as good as I've claimed in that you can save as many maps as you have hard drive space and load them to the unit in a matter of seconds. The real-time data displays are proving invaluable as I am now able to completely graph things like injector duty cycle/pulse-width versus rpm or airflwo or throttle position, etc. The map-trace feature is usefull to tell me exactly what cells in the map are being hit at a specific time during an acceleration run so I know where to make modifications.
Switching out injectors or MAF's is as easy as uploading a new map to the unit.
Timing module is still under developement but is almost done. Even without it the device has proven its value.
My recommendation is: Buy it!
warmonger
