When Headswap is done I will be spraying 150shot, so i need to know what 1 step colder plugs would be if running NGK's?? Or will i need to go 2 steps colder? If so what NGK plug will i need to use
i run autolite 103's copper. they are range colder. we dont benefit from platinum plugs...i'm also on a 125 shot completely untuned and my A/F is fine and have sparyed 40bottles through it with zero problems