Quote:
Originally Posted by Bluenose-2er
"Fundamentally superior engine"? Can you provide references for that? There has been a lot of discussion on this topic, and a lot of back and forth on the details. But that is a pretty strong statement to make with limited data.
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N55 has an open deck, so it'll always be limited in terms of boost. B-series engines are closed deck, which is the ideal configuration for aluminum motorsports engines with high boost. Porsche, Subie STi rally racers, etc are all closed deck aluminum engines. There are always compromises; closed deck designs are more expensive and generally require a bigger cooling system.
N->B wasn't just about improving NVH and efficiency; they are fundamentally more robust engines thanks to the move from open->closed deck.