Quote:
Originally Posted by m2ss
Is that because the S55 has better cooling?
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It's a lot more than that. It's a closed deck design, vs the open deck of the N55. The extra cooling and I don't mean just the extra radiators, but the intercooler too. The fact that it power doesn't drop off like a rock past 5000 rpm and so on. It's an engine made to be driven at high rpm for extended period of time. There is a reason a FBO N55 will make like 430hp whereas a S55 with just a flash tune will make 500. They simply aren't on the same planet, and it's not just the engine.
