Re: Distributor Rotors
Posted: Tue Sep 06, 2016 10:28 pm
Out for a run today, and The answer to my last question popped into my head.
Running a feed from the 12V starter motor line seems like a great idea... Until you stop cranking, the solenoid cuts the 12V feed to the coil, and you are then feeding 9V to the starter motor from the coil +!! OK, we could fit a diode, but why complicate things. The 'ballast' solenoids have two tags, but I could just piggyback from the ignition key feed into the solenoid. "Same, same, but different!"
The ignition circuit doesn't go through the solenoid, Jan. The 9V coil is fed by the output side of the ballast resistor. I just wanted an easier way to get more juice to the coil during cranking. Not that having a ballast makes that much difference to me, as I have no points and the reduced voltage benefit of the 1R5 coil is not relevant. But, the original Lumenition coil was a 1R5 vs standard 3R, so I replaced like with like to be sure...
Running a feed from the 12V starter motor line seems like a great idea... Until you stop cranking, the solenoid cuts the 12V feed to the coil, and you are then feeding 9V to the starter motor from the coil +!! OK, we could fit a diode, but why complicate things. The 'ballast' solenoids have two tags, but I could just piggyback from the ignition key feed into the solenoid. "Same, same, but different!"
The ignition circuit doesn't go through the solenoid, Jan. The 9V coil is fed by the output side of the ballast resistor. I just wanted an easier way to get more juice to the coil during cranking. Not that having a ballast makes that much difference to me, as I have no points and the reduced voltage benefit of the 1R5 coil is not relevant. But, the original Lumenition coil was a 1R5 vs standard 3R, so I replaced like with like to be sure...