Quote:
Originally Posted by phlfly
Why is that? Weight? But it could even better for sport car, with high temp it's stronger to with stand high temps.
|
When there are 500hp+ engines out there in cars that cost the same or less than an M3 and that have aluminum blocks, its clear that iron is not the answer. The only thing the iron block buys you is extra weight. And it is extra weight in one of the worst places - right over the front wheels (or, at least, in the front of the car).
The S63 or S65-turbo solutions have this same disadvantage. Either one will mean gaining engine weight vs. the current setup. An N54 or N55, on the other hand, weighs less than an S65.