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      10-11-2012, 07:17 AM   #1
First Lieutenant

Drives: 2009 330d M sport
Join Date: Aug 2007
Location: CZ

iTrader: (0)

50d engine power not up to BMW figures??

I recently saw 2 independent dyno test of 550xd, neither of them reached claimed 381hp.
The result were remarkably similar. Has anyone else also seen some other dyno tests?
Still hard to judge – maybe the engines were not fully run in or the petrol quality was low. I was also wondering what is BMW’s acceptable manufacturing tolerance in % of the claimed hp output.
Attaching one of the charts. Also I am not sure why the curve is kind of sinusiod shape in higher rpm...

Red is power, blue is torque
Attached Images

Last edited by michal12; 10-11-2012 at 08:32 AM.