Seeing the what is the best spark plug for a 3.6 makes me wonder if they are truly an improvement over Iridium?
My recommendation is use the plugs the factory calls for. You know these work and last a long time and a long time based on real world testing by Dodge.Seeing the what is the best spark plug for a 3.6 makes me wonder if they are truly an improvement over Iridium?
There is no benefit in this regard. The coils still still generate the same high voltage regardless of the plugs used.It's not just more miles out of the plugs. It seems they supposedly use less voltage to fire.
Being an Oldsmobile guy, I have dealt with the .080" factory gap, it wore a bit and it doesn't start. Oldsmobile actually had a TSB to change it to .060". I run them at a loose .045".Spark plugs fire at the lowest possible voltage depending upon condition of the plug and gap distance. You can prove this with a conventional coil and a high-voltage ignition tester. A gap of only .020" will fire at 9K volts. Open the gap to .060" and the voltage will be about 22K volts. Electricity is lazy. It fires at the least possible voltage. When the primary field of the coil collapses, it induces a high voltage in the secondary. During the rise time, the spark will jump the gap at the LOWEST possible voltage depending on conditions stated. Another thing. If both electrodes are sharpened to a pinpoint, the plug will fire at an even lower voltage.