Get a boost gauge.... you are not boosting man. What kind of WG do you have? Fix that piping problem. If your AFC does not past zero then you are not boosting. It doesnt matter if your BOV whistles. It doesnt mean you are boosting. And since you are not, chances are your engine is working harder now since it has to draw air all the way through the piping from the TB to the compressor inlet.
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