if in facyt it will run on gas then you could control the timing by the heat applied to the plug 1.5 volts would be hotter than 1 volt so it should fire sooner.whatcha thinks? if this does indeed work I will make all my conversions with a 3 volt pack with a petentiometer to adjust the heat(timing)you could always use the glow driver from a power panel you can adjust the heat it and see if it works.

Darin

ps. keep us posted ,this would really be the ticket for alot of people.