Quote:
Originally Posted by johnbmw6
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