I have the NGK BPRs in my 82...my gap is 0.031in(0.8mm) This is from the 82 TSRM. but they are platinum and they run fine You can also Index the plugs. This can help.AJ said:NGK BPR5EP-11 gap .043" or 1.1mm
Why would aiming the gap at the intake valve cause the electrode to break if the engine pings? Specifically how does the intake valve affect the electrode.Dragonfyre said:ping once and it's bye bye electrode.