After going to bed and thinking this through, I concede. You are correct. The timing light will only be triggered by the pickup which is effectively locked to the rotor. Although the rotor is moving forward in relation to the engine, it is not moving from its point of reference, the pickup, unless influenced externally by retards, etc... Thanks for the edumacation. signed RED IN THE FACE
The pickup is mounted to a base plate. The trigger star wheel is fixed with the rotor. The mechanical advance Rotates the rotor and its Trigger wheel in reference to the stationary pickup, thus altering the timing.
Then the vacuum advance can rotates the pick up plate in relationship to the rotor and its trigger wheel further advancing timing.
Maybe you need another nights sleep to further think this through.
If Im wrong, I only have two posts showing it. Boy , if Roberts wrong, hes got like 4 pages of Wrong.
