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      11-11-2006, 08:17 AM   #18
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Drives: E90 330i 6MT
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Originally Posted by n1smo
I was told in another thread that the butterfly valve stays wide open after the car is warmed up because the Valvetronic takes over the tasks of what the throttle body used to do. With that said, the only gain you will see is from the throttle body being bored out by 3mm. And I don't see how it will help since it is just at the point of the throttle body, its not like the entire inlet air track was bored out by 3mm.
Good point.