I am in the middle of trying to ramp up the power on my 2014 3.5 Ecoboost and I am running into some kind of limiter. The thing is, all of my sources look good and I am getting the correct desired brake torque/ETC requested torque(they match my driver demand at each RPM point), but my actual engine brake torque starts to drop below desired at about 3800 rpm. By 5800 rpm it is ~50 ft-lbs lower than the desired torque.

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Any ideas as to what could be causing the actual torque to be lower than desired?