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I believe he's using a methanol injection system and running 25 psi of boost to reach those numbers. His airflow was ~38-40 lbs/min on that pull as well if I remember correctly. A setup like that is very streetable as long as you make sure your injection media does not run out. The "fine tuning" as you put it is necessary regardless of what turbo you use, and gets to be easier with experience so I don't see that as a huge problem.
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Tom
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