11-28-2012, 06:07 PM
Officially Welcomed to the 'Fest
Location: Scottsdale, Arizona
Join Date: Jun 2012
Mein Auto: 2013 650i Coupe
Agree the BMW engines are factory under-rated but no way a stock 2012 engine is over-rated by BMW 100+ HP.
Originally Posted by haastx10
So here are the numbers from the Dyno. The legend to the graphs is on the right. I in fact was wrong... the car actually produced 405 WHP Pre, and 457 WHP Post Dinan Stage 3. I understand that these cars are notoriously under rated by BMW. So irregardless of the actual HP, and how much it is influenced by relative humidity and other factors, we are looking at about 50 hp increase and I'm telling you the car drives GREAT! I confirmed the numbers with Dinan and they said it is "Spot on"! That is the bottom line! I have yet to find anybody post actual Dyno numbers of their cars on this site... but there are lots of people out there that talk theory...
With your 405 WHP Pre Stage III we are looking at 510 HP at the crank/engine with a modest 20% drive train loss.
Also where did you get that first 328 WHP Pre-Stage III number?
2013 650i Coupe
BMS JB+ Stage 1
Merino Opal White
20" 373 Wheels
Full LED Lighting
Piano Finish Black Trim
Imola Red Diffuser/Gloss Black Wrap
Last edited by ShakeDaddy; 11-28-2012 at 06:27 PM.