best sparkplug?


okay i have a autolite 3910x sparkplug, is that good for a open clone running 109 octane turbo blue from sunnoco

clone king

New member
just keep the plug cleaned off with some quick revs while on the starting grid, or better yet fire it up and hit the track. the x plug will foul easily if running a Rich low side jetting, and you let it load up on low idle.
Actually i prefer an iridium core nipondenso for hi compression and race fuel or methanol.