@George B. that is certainly
@George B. that is certainly not true whatsoever. If you add a turbo to an engine designed without one, then you are adding more stress than the block, pistons, piston rings, etc. we're designed for.
But an engine that is designed to have a turbo is completely different. For example, how many Cummins turbo-deisel engine have 1,000,000 miles on them? Diesel designs already put more stress on the components than gasoline designs. But how can they add a turbo and not blow it up?
Because the manufacture used parts that are designed to withstand the pressure, that's why.