I think detonation kills them, and all of the things to turn them into “torque motors” increase detonation. Detonation starts long before its audible. I think the idea that RPM will break the block is a myth (like losing torque with bigger ports) and sends people in all of the wrong directions. Peak torque is peak VE and thats where detonation is most likely.

Also, people like flat timing curves and the engines pick up power at 36-40 degrees so people run them there even though they lose peak torque. How many dyno sheets have you seen where they run a timing sweep and 33-34 makes the most torque but 36-40 makes the most horsepower?

Its apples to oranges, but look inside the bottom end of a Mitsu 4G63, regarded by many as one of the greatest engines of all time and 1000 HP capable, and tell me if it looks familiar. But they do also have much less swinging mass as well.

I believe there was a member on here making north of 1000 HP with a turbo on a stock block with a knock sensor.