Spark plug gaps
AC Delco Iridium, 19307141. All the other info is the same, 73 low compression 340 with only non-stock components is LD340 and R2R MsD.
Car runs good. Carb was tuned with these plugs and gaps but during tuning we didn’t consider the plugs.
I’ll definitely try a hotter plug in the NGK and start at .045, which is just .007 more than now.
I have always understood that heat ranges vary between mfg. but anyone know how much AC/D and NGK are apart from each other?
My bad. Not Autolite.
AC Delco Iridium, 19307141. All the other info is the same, 73 low compression 340 with only non-stock components is LD340 and R2R MsD.
Car runs good. Carb was tuned with these plugs and gaps but during tuning we didn’t consider the plugs.
I’ll definitely try a hotter plug in the NGK and start at .045, which is just .007 more than now.
I have always understood that heat ranges vary between mfg. but anyone know how much AC/D and NGK are apart from each other?
