Originally Posted by Dave_3
Go to the UK section - There has already been well over 2 years of development on these engines.
No need to speculate.
I was looking at the times of this chipped 335d. Mid 13's at 105mph, right about the same as a stock 335i. But with great traction, (1.80 sec 60') high 12's are there. Not bad. How much faster will they go is the question.