Quote:
Originally Posted by tylerwillingham
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. |
those are short blocks. look at the long blocks, which would include the turbos and all the related plumbing. I would bet moneys that the N54 is heavier.