I'd remove 2 degrees of timing from 4k-5k and retest.

Be sure to disconnect the battery to clear the 1 degree of LT knock retard before testing.

Do you have a wideband O2 at all? A reading of actual A/F would be nice.

I do not have a wideband. In your opinion, what should removing 2 degrees of ...

I'd remove 2 degrees of timing from 4k-5k and retest.

Be sure to disconnect the battery to clear the 1 degree of LT knock retard before testing.

Do you have a wideband O2 at all? A reading of actual A/F would be nice.

I do not have a wideband. In your opinion, what should removing 2 degrees of ...

Sorry guys it's taken me so long to run tests a second time. I've made a few mods to my car and added the rpm range to my diagnostics. If you download my log, you will find the action range between 5:00 and 5:20 there is a slight retard issue a little later. Someone please give your thoughts. TIA ...

Thanks duster, I log rpm and re-run test. Not sure what your telling me about the plugs tho.

I'm attaching a data log. I think of interest in this log is my WOT run from 5:47 to 5:53. Can any of you smart gearheads out there tell me what's happening? Im running Exxon 93 Oct on an 09 Challenger R/T Automatic.
Mods:
MM 85mm TB
JMB CAI
Blastin Bobs Resinators
BT Catch Can
DS U7135
Rev 9r17
DS ...