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      08-20-2010, 01:36 PM   #16
E60orBust
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Drives: "The Brothers //M-Sport" E90/2
Join Date: Jul 2007
Location: MD

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Quote:
Originally Posted by johnbmw6 View Post
It has the same block, but different Internals, run 600 BHP through it and see what happens.
Don't they have different internal engine codes too? like N54 and N55 for the 3-series.
If the N54 can hit 400HP with some bolt ons and ecu tweaks, I'd imagine 500HP is a good (and safe) range for the 550i. 500HP/550TQ would be flat out
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