Quote:
Originally Posted by 40 Deluxe
"The spark happens when the points open." Thus timing of the spark is determined by point opening. Rotor position has no effect on when the spark occurs. Rotor position is fixed by the slot in the points cam. The lobes on the cam are what opens the points, so lobe position is what determines timing. Rotor position is coincidental. It just happens (by design) to be pointing at the number one contact when the spark occurs (at point opening).
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Spark does happen when the points open . Where the rotor tip points controls where the spark goes. Rotor position has more to do with timing than points .I tried to explain this in a previous post . Points gap and rotor tip position must work together if the timing is correct . If the rotor tip doesn't point in the correct place , the engine won't run . In other words spark occurs when the points begin to open . Rotor position controls where the spark goes . If the rotor isn't correctly adjusted it won't matter when the spark happens because the spark would be sent to the wrong place . I try to give helpful info. Timing and brakes are the two main things that so many can't seem ton understand .