Originally Posted by
Jabawocky
What I said was the ACTUAL spark timing , when the plug actually fires is anywhere up to 13-16 degrees BTDC. I can show you this on the dyno runs during the APS class.
Jabawocky,
I'm curious about this. Where does the delay between the opening of the points and the firing of the spark come from?
Current in the primary windings continuing to flow after point opening as the capacitor across the points charges?
Time for the field in the coil to collapse, producing the current in the secondary winding?
Something else?