Are NGK spark plugs any good. Also, what is the best spark plug to use for a 75 or 100 shot of nitrous. I'm told the tr-6 which is one step colder...but some people are telling me the br7ef which is two steps colder? Help?
Autolite 103s or ngk tr6. Gap from .032 to .038 most people go in the middle with .035 gap. My tuner told me to gap at .034 on My setup. Colder plugs do affect performance n/a. Some nitrous companies also make their own plugs but are more expensive than autolite or ngk. 1 step colder is good enough for you but any bigger of a shot you would want two ranges colder or better depending on how big the shot is.
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