Vehicle: 2009 Challenger 6.1L, 6 speed manual with Whipple supercharger /CAI kit. Engine and exhaust is otherwise stock. When taking long highway trips on hot summer days I get the CEL with P0175, 2nd bank too rich. (NO OTHER CEL FAULTS OCCUR.) Fault doesn't occur 'till after 40 or 50 miles. After clearing the fault with a code reader, it doesn't reoccur unless I take another long highway trip on a hot day. In doing some research, I reasoned that the fuel trims can't compensate enough to lean out bank 2. I haven't driven with the HP Scanner connected as, due to my schedule, most of my trips are shorter during cooler evening hours.
For the Whipple supercharger tune, the only mods I've done are in the DRIVER DEMAND section to help driveability. I've checked the FUEL section of the tune but don't find anything remotely referencing fuel trims. I'm a BEGINNER tuner and understand air/fuel or fuel/air ratios but tuning by torque is bizarre. Perhaps I need Harry Potter and a magic wand!
Assistance from an experienced tuner would be GREATLY appreciated. Thanks.