millhouse
Founding Member
Lets remenber what really splits blocks -detention- Nitrous and boost will put a lot more stress on the block than n/a does I will give you the perfect example What is the resaon we runn forgerd pistons with power adders, the extra amount of stress in the combustion camber the cast piston will not handle yet I can run hyper pistion on n/a all day and make 650+ hp and it will not effect the piston. In fact I knew I guy running a 200 shot on a small block chevy that all ready made 536 at the fly plus the 200 put him in the 7-800 realm with hyper pistons and it never blew buring a run and it was in the 10.5:1 compression range the only way it would hold together is he had the proper tune other wise it would of blew with the first shot.
What really splits blocks is the lack of material in crucial areas. The cracks typically start at the main journals and work their way up through the lifter valley. Detonation is not the cause of the block weakness. That's not to say that it wont contribute to failure...it's not the cause. What really splits the block is the exceding of the torque limits put on the mains and webbing.
I've said it before, stock internals will outlast the stock block...be them forged or hyperutectic.
As far as n/a outlasting f/i goes...I don't see it happeing at similar h/p levels. To reach the h/p levels you get with forced induction requires extremely high compression and extreme rpms. Your streesing the living hell out of the block doing so...and it's not going to be any more safe than a f/i or nitrious setup.