Joined: Mar 2004
Is there some reason you don't want to raise your octane one time as a simple test? If you put some 100 octane racing unleaded in it will be IMPOSSIBLE to get detonation. If you still have the noise then you'll know it's something else. If the noise is eliminated you'll know it was pinging.
2016 GT350, tech pack, JLT intake, Lund flex tune