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This one is not the tune. Timing is where it should be and while your boost may or may not be accurate (likely it is not accurate) based on MAF flow rate increase it is likely not very high. We see this from time to time with a weak motor or with cars that have been boosted for years. Out of nowhere the knock counts start to go high despite conservative tuning, then an abrupt weight reduction as the internals and fluids make their exit. Very rare and unpleasant when it happens, but luck of the draw more or less.
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