For all the naysayers saying all or most of the new cars come with aluminum blocks look at the new Challengers with the Hi Po motors using iron blocks instead of aluminum.
True, but some counterpoint examples - 13/14 GT500's have an aluminum block, unsleeved, with a plasma bore coating. The newer GT500's have conventional aluminum blocks with sleeves. They are good for 1200+ hp. Lots of LS's making above that as well. It can be done.
Agree the ring seal is a little better on alumimum vs. cast iron, but like Tig said- what's going to help the car more overall? Losing 30 hp from not quite as good ring seal, or losing 150 pounds off the nose of the car? Bench racing, at 2800 pounds and 850-820 hp, the weight savings with 30 less hp would be 0.05 quicker than more power with an iron block.
