Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Welcome to the new NAXJA Forum!
If your password does not work, please use "Forgot your password?" link on the log-in page.
Please feel free to reach out to [email protected] if we can provide any assistance.
Cant pull the gap larger? Or are you concerned about piston contact?
I used Champion rc9yc from the renix years on my forced induction 4.0L. They have a much more shallow tip compared to the extended plugs. The heat range may not work out for you.
When I spoke with NGK Friday, they only recommended a max of .008" larger. There is no concern with plug length but I really need to get to about .050-.065" gap. Today I'm going to pick-up some factort plugs and see how far I can take them!
I safely/concertively was able to get .047" out of a new set of ZFR5N's, could probably stretch that a little more but the radius of ground electrode comes into play. I can certainly get by with this to get started and see what the future holds.