I think the dyno graph shape for the S55 and N54 is very similar. I am not talking about numbers but the characteristic of the HP and torque lines.
Link to N54 stock dyno:
http://www.1addicts.com/forums/showthread.php?t=432677
Link to S55 manufacture "dyno":
http://f80.bimmerpost.com/forums/sho...d.php?t=893935
Both torque curves have the following characteristics: start with sharp rise, flat middle, and drops off at the end.
HP curve: start HP line slope is higher compared to middle, flat end.
Does this mean the S55 will feel similar to N54/N55?