Grip Grip,

You know who this is. The PTFC was needed to address closed loop boost concerns on your previous Hemi. However, on your factory Supercharged SRT-6, 14.7 afr under boost is not an issue as it would be for a modified N/A engine as your previous Hemi. This is with the assumption you are running factory boost. The engine and the ecu program are designed for the condition. Otherwise they could not warranty it. My former SRT-4 was exactly the same.

From your sig are you running 20psi? If so, then 10psi closed loop is likely abnormal. Your tune should address, but depends on whether you are getting any short term knock. PM me to discuss.