XFtoXE 14 Posted December 12, 2021 After some suggestions for spark plugs in a 302c Dynotec stage 3 cam, MSD ignition. RPM edelbrock. currently using bosch HR9BC+ but they are fowling up. Thanks Share this post Link to post Share on other sites
gerg 10,872 Posted December 12, 2021 After some suggestions for spark plugs in a 302c Dynotec stage 3 cam, MSD ignition. RPM edelbrock. currently using bosch HR9BC+ but they are fowling up. Thanks I would go NGK BP4FS, as as I have used 5s in the past and they ended up fouling. Just a heads-up, the MSD will chew through them pretty quickly. I wouldn't expect more than 20k out of a set. Sent from my CPH1920 using Tapatalk Share this post Link to post Share on other sites
bear351c 10,338 Posted December 12, 2021 Yeah, I use NGK BP5FS, just change them every 10,000. 1 gerg reacted to this Share this post Link to post Share on other sites