Originally posted by SleeperZ:
Originally posted by Wijn:
So "cold copper plugs"...any spark plug names and numbers you want to throw out there?

Wijn



NGK TR6 stock #4177 is what I have always used.



That's the same plug a Duratec uses but the Motorcraft and Autolite lines show a different plug?

The Z in AZFS means "long travel" (~1") and the Duratec uses "short travel" plugs. That means the TR6 is ~.3" shorter in extension compared to the stock Zetec plug.

I wouldn't think the TR6 plugs would reach fully into the chamber???

Does the Zetec plug normally entend a great deal into the chamber?
If that is the fact then the shorter plug would make sense for any boosted application.

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.