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View Full Version : best spark plugs for supercharger

tomsGT
06-05-2003, 05:33 PM
What spark plugs do you guys recommend for superchared 4.6's?
GarrettW
06-05-2003, 09:43 PM
The Ford Motorcraft AWSF 22C is popular with both naturally aspirated and supercharged crowds. It's one heat range colder; gap at .35 for a supercharger. For more agressive applications the AWSF 12C is the coldest plug Motorcraft makes and is two heat ranges colder than stock. I have had great success with the Champion 685; a copper race plug with a tapered seat, standard raised electrode configuration and long threads. It is three ranges colder than stock I think.
Pull_T
06-05-2003, 10:27 PM
i use ngk tr6 gapped at .026 - two ranges colder than stock
DarkShadowZ06
06-14-2003, 03:10 PM
Denso Iridiums (one range colder) and they come pre gapped. cant beat them. If you cant or dont want to afford those then go with Todd, he was right on the money
Pull_T
06-14-2003, 08:44 PM
Originally posted by 03ShadowSnake
Denso Iridiums (one range colder) and they come pre gapped. cant beat them. If you cant or dont want to afford those then go with Todd, he was right on the money

I learned my lesson about "pregapped" plugs. ALWAYS check them yourself. My NGKs were supposed to be 0.030 out of the box and were actually 0.036-0.038.

Densos are a great plug, not one you want to use if you are sorting things out or tuning it initially though since they are expensive to replace if you foul them.