the thing is that if you cannot afford to break it you shouldnt be modding it anyways. I think most of us doing turbo setups know what can happen. look at brians twin setup, he is making over 600 and motor is fine. the more I have been dealing with these turbo setups, I have talked with a lot of people. Several of the people buying are shop owners/tuners and a lot stress that the tune is one of the most important aspects of keeping the motor together. One guy in specific that is doing some of our setups had quite a few cars over 600 and been on the road for years with stock blocks. He swears by just good tuning. Maybe the guy is lucky, maybe its the truth, I dont know but just my .02 from talking with people on this situation