Quote:
Originally Posted by JETmn
Yes, a very exciting time! One thing a lot of people aren't realizing is that casting has come a LONG ways recently. Cast parts from 10 years ago are not like cast parts today. That said, cast is still not as good as forged. I think this engine may surprise people and hold up to more than they expect. 4G63's and SR20's 20 years ago held up to over 100whp/cylinder with cast rods.
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Very true. N54 pistons are 100% cast, though it is a very high quality cast. Believe the N55 crank is cast, but regardless that takes huge torque to break. The rods are where I’d be worried from an internal perspective, and we don’t really know how well the head flows. But I bet it’ll hold up just fine, 500 to the wheels shouldn’t be an issue at all. IMO once that is cleared all bets are off. The N54 has proven it can hold well over 600whp stock, so we’ll see how the 55 goes.