Take a look at vehicle voltage at the same time that you see the dip in ignition voltage. There are a few different types of voltage boosters, which came about when some guys noticed they had issues.
Caspers (I have two laying around) which ups the voltage from something like 14 to 17 volts at anything over 70% throttle.
Then there is a free one where you put a diode in line with the voltage sensing for the alternator. This usually brings voltage up across the board 1-2 volts.
ZZP booster - diode in a connector package that allows you to plug and play the above low cost diode.
And then..there's the ,.. why is voltage dipping question. Is it the waste spark? Is your gap too large, are battery cables corroded, are there other big draws going on in the vehicle.
