Quote Originally Posted by ct9a gsr
What's the drivetrain loss on your bimmer?

On Evo's it's usually about 13% - 15% when comparing base factory #'s to the crank with dyno results on an AWD DynoJet.
I do not know much about Evo's and whether they have particularly efficient AWD drivetrains, or are underrated from the factory, but I have seen many dyno's where S4's and WRX's are losing 20-22% compared to say 12% for rwd.