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      09-02-2013, 06:13 PM   #115
CarEnthused
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Quote:
Originally Posted by BlackLight View Post
How do you know this?
The NA V8 was lighter than the NA I6.
Adding turbos, intercoolers and plumbing does not reduce the weight...
The S54 was an iron block.
The S65 is an aluminum block which makes it substantially lighter.

If I recall correctly the S65 is roughly 33lbs lighter than the S54 but a lot changed over those years like the decision to use alluminum over a cast block.

Compare the S65 to the N54 in which the N54 is lighter than the S65

N54 Short block weight: 293.215 lbs
(see: http://bmwfans.info/parts/catalog/E9.../short_engine/)

S65 Short block weight (the non-discontinued, lighter version): 306.443 lbs
(see: http://bmwfans.info/parts/catalog/E9.../short_engine/)

Based on those numbers, the S65 is ~13.29lbs heavier than the N54 and the S65 and N54 are relatively old now. Just think what could be done to shave some extra weight now that 6 years have passed.

I may have over-reached by saying it would be a significant weight difference but at a certain point ever little bit of weight helps.
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