Originally Posted by
deadmancourt
i have 3 n21bf's and love them!...i was just wondering what you guys would recommend on a plug choice!...i live in southern california where its always 80 degrees or hotter!....i am also currently running a jp4 pipe and header!...what pipe/header combo do you recommend running on these motors!
When the temps are colder outside or even a bit cool I like to run the mccoy mc-8 plug, it's a medium plug, but a bit warmer than a odonnell 99 plug. the 99 plug works great in the hotter months because the engine is running hotter by about 25-30 degrees and a thinner wire in the hotter plugs gets burned up too fast, try the odonnell 99 plug in the BF. and good luck at the races.....
Oh yeah, the most popular pipe is the top end 9886 with the medium or short header, and the 9853ss is my favorite with the short round header.....I have heard the jp4 works great on Novarossi engines, but I haven't tried them and I do recommend the Nova Pipes and Headers.....