Originally Posted by
06300CSRT8
RPM limit has two, engine (PCM) and transmission (TCM). Engine can be set anywhere from the transmission limit and below but not higher, itll go into limp mode. Not sure if any of the major players in the hemi world have begun to tackle the new TCMs for the 8speeds.
Throttle delay not sure on, since I am sure you have already taken a stab at the tip in timing? There is a table that handles throttle voltage change versus timing retard.
Also you may be facing a mechanical delay, with the bypass closing slowly. With the higher boost, maybe its struggling to close fast enough.