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      09-26-2013, 09:14 AM   #32
mkoesel
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Quote:
Originally Posted by NISFAN View Post
Comparing the two pics in the previous page, and crudely measuring the various components, it is certain that the bore size is bigger than N55.
I looked at that also but came away unconvinced either way. It is hard to gauge scale.

Quote:
The strange thing is that block height is also bigger on S55.
Could it simply be a closer view?

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Block height is typically linked to stroke length (yes block height can be stretched to obtain a long rod to stroke ratio, but unless the ratio was way out on the comparable engine, a smaller stroke would alter this any way).
Deck height of an N74? Perhaps?

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My money is on this being a bigger displacement than 3litres.
I have to assume that if the reported bore number is indeed correct then so is the stroke and thus the displacement as well. But certainly the possibility for increasing displacement by the aftermarket would be there.