Quote:
Originally Posted by Racer20
Just because transmission aren't exploding as soon as a car is tuned doesn't mean "it handles the power fine."
A transmission is designed to withstand a certain amount of stress in order to be reliable under all conditions for some amount of miles.
Exceeding that stress reduces performance or increases the likelihood of failure. Period. Either BMW is willing to accept that increased risk of failure, or they will need to improve the design.
It's called a safety factor, and it's a basic tenant of engineering. You have no way of knowing what the design limits of this trans are or what it would take to handle the extra 46hp.
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I'd say it's not only the transmission, but also the interface between engine and transmission that is at stake. Maybe a higher tune version of the B58 could be more prone to failure from mishandling through a manual transmission.