Quote:
Originally Posted by V6PowerStang
if they are going to stay in the car while daily driving, go one stage colder. if you are going to have a set of spark plugs for the track then get two stages colder. i don't use nitrous on the streets so i just run stock plugs until at the track. they are kinda bitchy to change on our cars (the 4.6l guys are lucky, they are easy on them) so do what you want. motorcraft copper AWSF-22C's are two stages colder and AWSF-32C's are one. -42C's are stock equivalent. i don't know the autolite equivalents but you can ask any chain auto store. gap bigger than .035-.038. don't go bigger than .045 though. run as high octane as you can, 91 or 93 depending where you live and what is available.