SC Spark Plugs

DynoDaddy · December 27th, 2004, 02:27 PM

To my suprise Denso irridiums are not available for the Viper. What brand of plugs and heat rating are you PSI guys running? I searched and it looks like champions on all motor seem to be the choice. Thanks for the suggestions

gtsbob · December 27th, 2004, 03:32 PM

I've been using NGK6418 irridiums for about 14 months. I tried a lot of plugs before I settled on these. They seem to be the perfect heat range for my setup. They are expensive but good for a lot of miles. I think I got them from NAPA.

1TONY1 · December 27th, 2004, 04:50 PM

I have run the Iridiums in the Viper...I don't know the number right off.

RedGTS · December 27th, 2004, 08:59 PM

Autolite 3923. Seem to like a really tight gap too.

DynoDaddy · December 28th, 2004, 12:08 AM

What are you guys gapping your plugs at? .030?

DynoDaddy · January 11th, 2005, 01:12 PM

Just for search purposes later on. NGK 6418's are the irriduium one step plug.
2667 is a 2 step colder irridium plug.
Summit sells these for 6.99 and 7.99 compared to the 12.50 at local stores.