Quote:
Originally Posted by Kuwen
If BMW subscribes to a rating philosophy similar to that of the 1M, wouldn't even 450hp be low? From the bit of research I've done over lunch, most 1M's were dyno'ing their factory rating which could have the F80/82 pushing 480+hp at the crank (depending on your assumed drivetrain loss).
Am I crazy?
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You can't carry over the exact same logic or percentage to M4 because it still has the same displacement and there is a limit to what can be extracted from a 3 liter engine no matter what turbo technology that they have used. Being safe in terms of cooling and keeping decent throttle response and no lag are also fundamentally important.
Don't forget that as long as turbos are stock even best and most aggressive FBO tuned 1Ms could yield around 450hp and 500tq, that is what you can do most if you care about the reliability as well.
So I agree with people who comment that this won't be that much tune-needing and tune-liberal engine as versions of N54 was, there were too many restrictive components present with the N54, it was BMW's first try on a relatively lag free turbo technology, now after seven years, the new engine of the M3/M4 might be already where sensible owners would prefer to leave it as it is...oh well, almost.
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