I have a 6.4 that is raced in NHRA/NMCA Stock Eliminator. I am using a Holley Dominator system on the car. 2019 1320 Challenger. I use a leaded race gas (Renagade 116). What has anyone experienced with ignition timing? I use 26 - 27 degrees total above 6000rpm, generally finish line rpm about 7600-7700. I have been told that is max timing to use because of detonation above 27*. Anyone run 28 to 30* of timing and did you pick anything up? Thanks, Dyno