To increase the gap you will need a 'sport coil' vs the standard coil or you will over drive the coil. Most people just get the sport coil and don't know they need to increase the gap settings to gain the performance increase and the spark stays exactly the same.. no hotter spark, no greater spark... just the same with a fancy new coil.
Once you get a sport coil and increase the gap, you will never go back to a standard coil again.
Keep pounding Michigan!!!!!
ND Trivia question: What team beat the 4 horseman both home and away prompting ND to remove them from their schedule?
-Rick
It's my understanding that a resistor circuit allows the coil to cut back 50% after you release the starter switch. If you don't use the resistor then you would need a coil designed to run without it or you will be running the coil in the starting mode 100% of the time.
When I replaced a points system with the Pertronix ignition, the instructions had me upgrade to a non-resistor coil and remove the resistor connection and with the new coil I could increase the spark plug gaps from .25 to .35 b/c of the hotter coil.
Good luck
-Rick
It was replaced with a non-resistor type coil, so by increasing gap in spark plugs would change heat at coil??