3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
According to NGK the best way to close the gap is to tap the electrode against a hard surface. This doesn't seem to smart to me. My gap tool only makes the gap bigger.
To close the gap, use the same part you use to open it just pull it the other way. Put it on the end of the electrode and pull towards the plug instead of away. Hitting it on a hard surface makes no sense.
i use a hard surface. Been doing it for years. it DOES NOT take much effort at all to close the gap. Just begin tapping it lightly and checking the gap. You'll see it doesn't take much to close them up a little bit.
However, I would go with the gap provided. If you aren't having plug blow-out at WOT, then there's no reason to close the gap. A smaller gap will reduce engine performance. it may go un noticed, but it will reduce the power.
Try the plugs as-is and only if you notice a skip at WOT then reduce the gap, but generally you want your gap as large as possible without blow-out.
Blow-out is when the spark cannot sustain the gap bridge with an arch and the engine basically blows it out from high revving situations.
Being that the Pulstar plugs are suppose to generate a much larger spark off the same voltage as a standard plug, .040" you'll be fine.