Correct. Disconnecting G1 and grounding that output pin will make the distributor output a 12/1 signal (12 per crank rev, and 1 per cycle). Not 12-1 (12 per rev and 1 missing per rev). Your settings would be Dual Wheel, Primary Base Teeth 12, Secondary Teeth 1. This would allow it to know cycle (cam) info, permitting sequential injection.
Correct, but it would technically be a 12/2. "+" or "-" indicate added or subtracted teeth on the same wheel, while "/" separates crank and cam signals (360°/720°) This will not allow sequential, as it sees a "cam" signal every crankshaft revolution. Speeduino may be confused as the two "cam" signals are so far apart, as it is expecting to see both /2 'cam' signals on the same crank 12/ revolution. So, 12/1 setting may actually work if using both G1 and G2 sensors. I have not tried that, so I can't say if it will work for sure.
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