Are you still running the stock ngk zfr plug?
I’ll try it, thank you for your response and time. Trying to dial this in to hit 500hp.Try running a bkr7ev(4776), that plug might be too cold, and sometimes the iridium and higher plugs don't work so well in a high boost application, gap somewhere between 24 and 18
Yes around 7k it’s breaks up pretty badI run the BKR7e spark plug which are the 4644 plugs. I gap them around .024" and haven't had issues at 18 psi. COP should be taking up some of the gap for blow out. I'm guessing its breaking up up top?