i have read so many times on this forum a couple of you guys are able to make 550whp+ on stock ignition, therefore i didnt bother to use that fancy MSD parts

but unfortunately i got a call from the guy that was tuning my car , he said that my car was misfiring on high revs

ecu is Autronic PnP , dizzy has done 83xxx miles, msd leads, heat range 8 spark plugs

what should i do now ??

oh car was only boostin 15psi and making 360whp ~8000rpm

thanks guys

 

Might try a different heat range like BKR7E and a smaller gap (depending on the gap you are running now.

Are you running an external coil, or the stocker?

 

mine pops up top at like 8500 i have 7's gapped at .020 and am trying 8's in iridium as per john at ngk. i am at 520 with no timming yet. hopefullywe can get it on the dyno tonight and see whats up.