NEED HELP RB20DET HIGH RPM MISFIRE

[Southnspirit73]

NEED HELP RB20DET HIGH RPM MISFIRE

Hey guys i was hoping to get some assistance i own a R32 GTS-T had a blown head gasket at that point could still rev to red line... now i have had the car repaired changed the head gasket water pump timing belt and kit all drive belts had the head machined cleaned and crack tested arp head bolts added brand new iridium spark plugs brand new splitfire coils and a new coil loom etc car is all back together now starts perfect feels fine but when u give it a good rev starts mising at 6000rpm  only things i realy havent changed are igniter afm or exhaust im hoping some of you may be able to assist with some ideas or if you are local to even come out and look over it with me this is my first skyline so i am new to the scene but if what i have stated here isnt enough feel free to ask me direct questions id be happy to brain storm  thanks guys!

[Spark Automotive]

Stock boost mate?? I'm currently having a similar symptom with a customers car so I'm keen to see any solutions I haven't tried already.

[Southnspirit73]

hey buddy i fixed my issue as i was using iridium plugs with a 1. somthing gap = default gap i got some NGK gaped to 0.8 and it has since fixed the misfire so im happy got a perfect RB20DET