Quote Originally Posted by DennyW
We run the plugs that cost $1.89 and can't tell any difference in the dyno room or on the track over all the other hi dollar plugs.
That 1.89 spark plug comes up as Saab NGK 2.0 liter.

I don't believe the 8 out of 10 guy thing either.

At the track here, that number refers to Autolites.
O.K,maybe it was only 7 out of 10 guys run the NGK plugs.
I will say some of the plugs that use the "trick" materials may last longer but I doubt they make any more power.
The hi-dollar plugs will actually make your ignition system work that much harder when you try to lite it all off.
Keep in mind electricity always tries to follow the path with the least resistance which might mean with a cheap or stock ignition system you might loose hp in the higher rpm area do to the ignition system having to work that much harder.
The Split-Fire plug is nothing but a clever marketing scheme.
I showed one of these to my Dad when the first came out and he dug around in the top of the old tool box and found a plug from the early 60's that looked much like the Split Fire's.
Denny we really need to work on your sense of humor I think it might be starting to slip again.