nitrous plugs

I am looking to spray a 200 shot with a dedicated fuel system. right now i am running ngk tr6 plugs (one heat range colder) for a 200 shot should i go two ranges colder like an autolite 103. does ngk make a colder plug then the tr6?

I'm running a NX 175 shot with Autolite 103's. Runs great on and off the bottle. :)

103's over hear also.

I've heard alot of bad things with the NGK plugs, I've ran NOS for over 8 years now and I've always ran Autolight 104's (2 ranges cooler) and have never had a NOS problem. The only bad thing with too cold of a plug is a loss of power when running NA.


Brian

NGK TR7 is the same heat range as the autolite 103. NGK number goes up for a colder range - Autolite number goes down for a colder heat range ;)

While I'm currently running the 103,(auto store was out of stock on NGK), I've ran the NGKs over the past 6 years without a problem.