Yeah, its pretty nuts. Our sled puller is daily driven and makes 906HP (1800approx TQ, our dynojet flatlines TQ at 1500, but Cummins are generally 2:1) on a single charger with no NOS or anything.
We are just starting to get into the DMEs for the Cummins (using EFI Live) and the results have been pretty impressive so far, but we have a LOT to learn. I imagine, in typical BMW fashion, that our DMEs are pretty complicated.