Quote:
Originally Posted by qbix
Can someone explain me howcome dyno results differ by those official stated by BMW by that much?
I don't believe that BMW doesn't know how to check and dyno their products.
It is also weird to me that NA engines always come out under rated opposed to FI engines.
Any thoughts?
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That is a big question several of us here are trying to figure out.
I have a hunch it has to do with testing standards and methodology when manufacturers establish their ratings. But I have not yet put the finger on the exact technical explanation.