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.