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      02-13-2013, 08:25 AM   #14
Asbjorn's Avatar

Drives: ESS twin-turbo roadster (E89)
Join Date: Mar 2012
Location: European in China

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Originally Posted by javol View Post
DPs are a really nice mod, the car feels smarter since the throttle response is improved (less turbo lag). No bad effects on the low-end torque. I could feel the DPs performance benefits with and without the JB4.
Again, perhaps a stupid question, but are you sure that is not because the turbo boost has increased as the exhaust flow is less restricted?

Or is it somehow controlled by the ECU? And if so, is the explanation that target boost is reached faster due to lower flow resistance?
Little known facts about BMW: 1) The N54 is still in production and used in the current Z4 35i and 35is. 2) In a Z4 you can get sport+ steering combined with normal suspension etc by selecting DSC=off. (Update: DSC=off also offers sports steering in the M135i) 3) All Z4s with 19" wheels are still only offered with the worst performing OEM tires ever sold with a DCT equipped BMW (Potenza RE 050 RFT).