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      05-24-2010, 11:12 PM   #7
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Drives: 2008 335i Sedan
Join Date: Aug 2009
Location: Chicago, IL

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2008 335i E90  [4.00]
Originally Posted by cholmes1 View Post
Thanks for all of the info. I am posing the same question to the European forum, but based on these responses a consistent driving style and a better intercooler and I would be in as good or better shape.

Any recommendations on chips or the intercooler? Don't want to stress out the transmission.
I would wait a little bit. The 335d is a relatively new engine for the North American market and the tuning companies have not had a chance to dig into it deep enough. However, there are already products for the 335d that you can buy right now.

Here is a software upgrade for your ECU made by a highly reputable BMW tuner:

Also, Burgertuning is working/experimenting on a diesel version of their JB3 piggyback unit.

Intercoolers would be rather easy to make.

I predict that within 1-2 years we will definitely see a big surge in performance products for the 335d engines here in the USA market. We are not too far from a point where well tuned 335ds will be on par with well tuned N54 engines.