iron blocks
There is a huge difference between turbo horsepower, and supercharged horsepower when speaking about the block.
There is a turbo 2UZFE iron block in the US that goes 6.8 with 1,800hp using a four bolt main conversion and a brace with no damage.
We have a turbo 2JZ iron block here in Oz that has 2,000hp using 4 bolt mains with no damage (on 70 pounds boost!)
But stick a blower on any of these and the story changes radically. The affect of the wide blower belt pulling up on the crank (despite crank braces) and the torque produced tends to stress the block in ways that a turbo does not.
So the question remains - why bother with a blown combo.
Just drive one once and you will change your mind - haha
PC