Hey all, I'm new here and trying to figure out what an acceptable amount of Knock Retard (if any) is okay for the 392 hemi? I have a 2014 Jeep Grand Cherokee SRT and it shows 2.5* knock retard. I put different fuel in and a octane booster (3 numbers) and it got it down to 1.5* KR at WOT. I'd like to have zero if possible. Wondering if this is normal or what?
I plan on checking around the sensors to see if a heat shield is loose or something and then replacing the sensors if I have to