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      04-22-2012, 04:33 AM   #108
Asbjorn's Avatar

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

iTrader: (0)

Originally Posted by Gunzaro View Post
Asbjorn, your ESS tuned Z4 seems slow - seriously. Esp. compared to UBI's video. Although there is a big difference in ambient temps, for a TUNED Z4 it definitely should be faster. Should do a dyno test.

I remember I reset my adaptation values after the tune and it was faster, by using a Bavarian Technic tool.
Well, it does not feel slow, and I doubt I will be able to find a dyno here... If it is indeed not putting down the best numbers, it could be that my airfilter is full of dirt, because the air-polution is pretty significant over here and we also get dust storms and I never had it checked. Is it possible? Or it could be the poor fuel quality which varies from station to station in China. No matter, the differences between normal/stg1/stg2 are definetely there. I will try preparing some more videos and check back in with you...
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).