theres so many other factors besides how much horsepower that affect the resilience of rods in an engine. timing, air/fuel ratio etc. the whole 'safe for a certain hp' thing assumes the tune is safe. If the tuner puts your car on the dyno and leans the **** of the motor with high enough boost levels (which actually don't need to be that high on a high compression motor) then you'll have knock and possibly damage, ie, what happened to your car.
so yea, the fact that you weren't making as much hp as other vq37's, doesn't automatically mean you were safe.
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