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Old 09-23-2010, 11:52 AM   #1
Sir Smirnoff
Registered User
Join Date: Jun 2010
Location: Baltimore, MD
Posts: 163
My Ride: 2002 330i
Difference between s54 and m54

I know it's somewhat comparing apples to oranges, but how the hell did BMW get an extra 105HP out of an additional .2L of displacement????

The difference between an m52b28 and an m54b30 is 25 HP @ the crank.
How did BMW get the extra 80? I understand that there are different camshafts, ITB's and a more aggressive tune, but that cannot make 80HP! People here change out the camshaft and tune all the time. They usually get only 15HP out of that. So now there is 65HP that is unaccounted for, or at least around there. I can't think of anything that could give you that large a jump in horsepower except boost! Can anyone explain this to me since, as far as I can see, ITB's make a lot more power. But if ITB's made even 45HP, I bet a lot more people would be doing it....
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