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Originally Posted by 9114s
Thanks for posting. I have a couple of question
1) What is JB1 baseline? 270hp looks high for stock. Only 10% loss for AWD looks too little.
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Better called N55 Stage 1, that's just what the dyno guy put in the computer (JB1).
270 would be high for stock if the car was actually putting out around 300 fwhp. We suspect the engine is a bit under rated and actually putting out more. 270 seems to be in the ballpark for these stock.
Also the Xdrive seems pretty efficient. Compare some stock numbers between a 335i and 335ix