Whats the difference between a trigger from a magneto and a crank trigger?
The main difference is the stability of timing in most cases the generators are driven by a drive system from the block in a single or dual configuration. To provide clearance the drives are designed with an offset driven by a belt arrangement or a set of gears. Belt stretch or backlash can affect timing accuracies as well as the cam to crank drive suffering from the same problem. This theory was unproven until RacePak developed their newest software that can monitor timing during a run. Here we have a run showing the difference in timing in the generators vs. crank triggers. Notice how much the timing changes with the generator and how much smoother the timing is on the crank triggers. With the timing moving that much from base timing it explains the some of the catastrophic failures.
