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The line is only in a slight vaccum when the engine is decelerating. other than that it is under pressure.I drilled the line about a half inch from where it goes into the compressor housing. Thats where my guys told me to do it at.
i deff gonna try it... but im gonna wait till i get my booast gauge comes so i can have some visual satisfaction along with the seat of the pants satisfaction.. or atleast know if it actully made a diffrence or if it was just in my head.