Quote:
Originally Posted by BMW-RaceR
Nice numbers!
I like the HP curve at the top end.
But where is all the low down torque?? (below 3000rpm)
That dyno looks weird compared to the 118I and Cooper S... Or the character of the engine in terms of torque, but also a little in terms of low down hp.
Im guessing it is the dyno not showing the proper numbers at the lower RPMs???
Do you know how the car feel below 3000 RPM?
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Yes its alot better than it looks. You start feeling alot of pull from 2000rpm onwards. Its just that the dyno only starts capturing data from 2000rpm onwards (3rd gear) so the readings are somewhat delayed. Peak torque and HP are valid. Btw, these figures are what's captured AT THE WHEEL HUB itself. So what you're looking at is in fact power at the wheel hub, not flywheel power.
Its a dynapack so we take off the wheels and attach the dynapacks to the rear wheel hub. The only different difference between the dynapack and a rolling dyno is tire-friction loss (which depending on the condition of the tire, makes it less consistent in a minor way).
Here's another interesting tidbit - various driving modes (eco-pro, comfort, sport) come with their own maps. We tested on sport mode and the difference compared to comfort mode was around +5hp.