Originally Posted by M3PO
Mike's description is correct. Basically, I dynoed stock 100E, tuned 100E, stock 231E (twice), and tuned 231E. Tuned 100E made great gains over stock 100E. Stock 231E made a bit more than tuned 100E. Tuned 231E didn't make much more than stock 231E, if any.
Gotcha. And thank you Mike for the explanation, so basically Evolve changed the maps, and that map change was the same, and BMW made changes that made power, which were not map-related. I'm still slightly confused on how that works, but no need to explain further, I'm sure that if someone had to explain it in-depth we'd be here for months.