Zfan

What NGK spark plug are you guys using in your LS3 headed motors? Mine is an L76, LS2 with LS3 heads and intake running a EPS cam and 150 shot. It still has the AC Delco Iridium plugs in her and I usually only run NGK's in my motors.

Thanks
Mike

C5natie

iTrader: (1)

I was using tr6 for my cammed LS3 but I went back to Autolite 103's. I felt the car liked them a bit more at higher revs and theyre slightly colder so I bumped the timing up a bit.

Zfan

Thanks, appreciate the info.

Alvin@PCMofNC

We run NGK Iridiums here. TR7 irids in my own personal 700rwhp LS3 camaro, and also in my s/c TBSS (which is running LS3 heads). The copper versions are great too but there's better longevity with the iridiums, and I think they idle smoother as well.