From a recent log file he sent me it was around 2 - 2.5 for a romp through 1-3, later in the log another series of WOT runs showed 0 to 0.5 deg of short term knock. Another log showed it peaked at 3 on a couple of WOT runs (1-3, and one in 3rd).

He lost et and mph, the motor is down on power.

A 2009 5.7 should put 300 (give or take) to the wheels stock on a Mustang dyno, after installing a canned tune I'd expect more than 292...

A 2009 Challenger R/T like his (5.7) with the same tune put down 325 hp / 383 tq on the same dyno on the same day.

A 2009 5.7 should put 300 (give or take) to the wheels stock on a Mustang dyno, after installing a canned tune I'd expect more than 292...

A 2009 Challenger R/T like his (5.7) with the same tune put down 325 hp / 383 tq on the same dyno on the same day.

Then there is the clear loss of ET and MPH ...

Perhaps we should have reloaded the stock tune and see if it made any more power.

I believe you dyno'd 322 hp / 340 torq stock right? Did you get a dyno with the r14 tune loaded?

At what point were you forced to do a DCX file update via the predator?
Did that take place at some point between r14 ...