Changing Spark Plugs

kramer03gt said:

Also why does the NGK plug or one of its type perfered over the stock plantium type plug or an normal plug i guess i could say, does it have something to do with the spark burn?? and how it affects performance??

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I honestly don't buy into most of the new spark plug gimmicks out there, but I believe the groove that is manufactured into the NGK center electrode tip really makes a big difference.

Everybody just assumes that it is an explosion that pushes the piston down on ignition. Well it's not an explosion at all, it's a controlled burn. If you do a search on the internet, you can find some high speed video showing the spark and then the flame kernel as it slowly develops and turns into a sweeping and expanding flame front.

The groove in center electrode tip forces the actual spark to the outer edge of the ground electrode. This puts the spark closer to the a/f mixture and promotes the flame kernel growth, all of which make more power. And trust me, you will feel a difference.

kramer03gt said:

so this is all starting to make some sense.. so then i guess why did ford put the platinum plugs in to the car to begin with?? rather than using something like the NGK's, was it due to the longevity of things??

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Exactly. The only thing platinum plugs are good for is longevity. A platinum plug in our motors will actually perform worse than a standard plug.

Now Iridiums are a different story. They will perform well to, but until the price comes down a little, I will just stick to the NGK's for now.