Quote:
Originally Posted by kcgman
I'm a new BMW 335d owner. Bought the car two weeks ago and still going through the break in process (<3500 RPM and under 93 mph). Even at under 3500 rpm the car really seems to move. I'm looking forward to getting past the 1200 mile break in period. I have two questions about the turbos on the car.
1. When do the turbos kick in? I've put the car up to 3200 rpm (quite accidentally) while merging into highway traffic when two trucks had me in an awkward spot. The car accelerated VERY quickly at that point and probably engaged one of the turbos -- but in truth I don't know. Since then, I've been below 2500 rpm.
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I believe with the sequential turbos, the smaller turbo is almost always going at the lower RPMs, then as you continue to speed up and get to the higher RPM's, that's when the second, larger turbo kicks in, giving you the quick acceleration you felt.