zbbow1974

guys i got my nos installed and my car tuned for it i just need to make sure i got the right plugs, they are autolite copper core i think it is, they are 2 stages colder than stock and shorter they dont seem to have as many threads going into the heads, is this what i need to run? i am new to all this stuff, the guys at speedydyno said they looked ok for nos to them but you guys are the real pro's got pics of my car in my garage now

96Supedupstang

Hey,
Congrats on the mod!
If their only one or two threads shy don't worry about it! But anymore then a few, look out, you don't want the plug to far out of the cylinder chamber to where its not sparking where you need it in the charge. But only a couple of threads shouldn't make that big of a difference!

zbbow1974

oh it drives just fine no miss or anything i was just afraid of the premature spark thing i have been hearing about