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      03-12-2013, 03:14 AM   #31
Brigadier General

Drives: 130i
Join Date: Nov 2011
Location: QLD, Australia

iTrader: (0)

Originally Posted by Obioban View Post
That dyno is from a Z4 3.0si (also an N52). It's that because that's what SS used as the development car.

SS's dyno can measure drivetrain power loss when it's winding down. They do a pull up (blue), pull down, and then add them together-- the result is engine HP (light red). They then do it again with the exhaust mod (in this case headers) and repeat (dark red).
that's not how it works [in real life] and is very dodgy

plus again, 220bhp was never offered in N52B30 so very inaccurate

but ok thanks for informing me