- Fri Oct 16, 2020 7:29 pm
The following are generalities and assumptions, based on similar units, only for concept. Most CDI (Capacitive Discharge Ignition) units of this type are integrated controllers, meaning they typically contain sections and controls to read signals, determine timing delays for timing advance, provide step-up power to the CDI firing capacitor, and contain a firing output section to connect to the coils. More or less, they only need sensor signals and power in order to time and fire the coils as an integrated unit, using factory-programmed parameters.
For your next question, yes, Speeduino could control CDI units, but you would have to be familiar with electronics with an integrated unit such as this. Simpler units often only need the trigger signal from Speeduino's IGN channels to control timing and firing, but this one is all tied together internally, which can be very confusing. In-general, this makes it less suitable for Speeduino to control (from a user perspective), and typically users will either replace the box with a simpler version, or convert from CDI to IDI (Inductive Discharge Ignition) coils, coil drivers, and control. Likewise, the crank angle system should have higher resolution (more "teeth") for the predictive timing method Speeduino uses if it were to attempt control with good accuracy.
Optionally is to let the CDI system function the ignition as-is, and let Speeduino control fuel-only. This is viable, but misses the opportunity to control and alter ignition timing, which is integral to extracting maximum performance from the altered fueling. Which path you choose is entirely your decision, based on your skills and willingness to research, balanced with your purposes, goals and budget. Hope that helps.
-= If it was easy, everyone would do it =-