I had some really cold autolite plugs in my car when I had my ZEX kit on it. Well I took those out and put in TR-55's and am wondering if these will be safe for the spray. I plan on spraying a 150 shot on the stock motor using my Compucar plate kit. I plan on only spraying when I am on race fuel but don't know if I have to change the plugs again cause I really don't want to.

 

Why take the chance put in some ngk tr6 or equivilant colder plug and be done with it. It wont effect your every day driving.

 

I ran my best NA time so far on Autolite 103's. So the cooler plug seems to work equally well for NA and nitrous use.