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      01-20-2013, 02:55 PM   #28
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Drives: 2018 X3 M40i
Join Date: Mar 2008
Location: Queens, NY

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2008 BMW 328xi  [4.10]
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Originally Posted by Propagator View Post
Thanks for the refreshingly unbiased review. People severely underestimate the power of placebo. There are entire industries run on that stuff. Human beings are very unreliable detectors, and any comment like "I definitely felt a difference", whether it is about an ECU re-flash, or a pure silver speaker cable, or a $1M violin, or a $100 bottle of wine, etc etc, doesn't mean jack without reproducible measurements to back it up.

I would personally pay that much money only to fix up the throttle delay, as I find it very annoying when I try to heel and toe. But I'm not surprised the power gain is very modest.
Thanks for understanding my review and you're welcome for it. There have been dyno sheets that've showed gains from the tune, but 10-15 HP is minimal, as are any gains from any performance mods to our engines. I just want people to know that I personally didn't feel a significant difference, but there's definitely one -- just not one that will blow your mind.