500-530 ft lb here...not one shred of metal. My bearings are surviving and my rods are straight. 2000 and counting, lets hope some of us can redefine the limits of the VQ.
Detonation will kill your engine ages before you over-stress internals. Throwing 11+ psi from anything in a pump gas is detonation inevitably, one hot day, poor components(IAT and fuel temps too high, poor boost control etc) and a bad batch of fuel will kill a 300ft lb car just as fast as a 500ft lb.
While torque is definitely the break limit, the tune can kill any build all the same. Get a great and efficient kit, get topshelf parts, handle the fuel problems and maybe **** wont break with shitty 350ft lb tunes. Just sayin.
But that's just how I think. I enjoy my >500ft lb...not one hitch yet. The oil doesn't lie friend.
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