Spark plug question for experienced tech.'s or racers please
#1
Spark plug question for experienced tech.'s or racers please
My car loves Autolite 103's gapped @ .042". Has intake, heads, & mild cam. I know that many people use NGK's, but, mine seems to like these best. Anyone know a lot about these old faithfull's? Is there any advantage in increasing the gap to say .046? Car makes 380RWHP & 420 #-ft. tq.. Thanks.