Quote:
Originally Posted by Poochie
Maybe you breezed pass the part where I mentioned that "...the ubiquitous S55 motor is the bread-and-butter in the high-end M lineup."
Besides the new M2C, obviously the same crank hub was used in all those mentioned vehicles, throughout the S55 line-up.
However, all those "stock power" motor the output never crossed 500hp..
Other than a few isolated cases of stock setup, it's mostly people who venture pass that 500hp/to number is usually the ones that experienced a burn out crank hub..
One would assume, BMW built that part with a tolerance limit of up to 500hp.
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There is really no concrete evidence that spinning the crank hub is from power levels. IMO its a manufacturing defect from the factory.