I dont recall my car doing this before but hey maybe its new. I have a gap of .023 and using BCPR-7ES11 @26psi. Would the temp of the plug have anything to do with this? All i have for ignition is the MSD Coil and NGK wires.(worked before). Any chance that might of went bad?

 

whats the power of your car, i think the threshold of those plugs is the 350-375 range, but i have seen poeple make 400 on em. my gap is about the same on those plugs and i spray at about 18psi.

i would try an NGK #8

 

didnt know there was a HP rating. I actually forgot all about that. It was fine at 420hp @19 psi but 24-26psi its blowing out. (480hp).