Benefit of a "Vortex Generator" in a turbocharged automotive applications As the title states, What is, if any, benefit of creating a vortex in the air flow prior to it entering the turbocharger. Here is a photo of the "Vortex Generator" in question. http://forum.gtiroz.net/files/forsale9_713.jpg [Broken] Air goes into the opening in the middle of the photo, passes through the fins, and then travels through the rest of the pipe and out the other end where the blue connector(that is visible on the left) is connected to the vehicles turbocharger. The claim is that a vortex of air is generated, spinning in the same direction as the fins on the turbocharger therefore causing less friction for the fins when they "grab" the air forcing it into the other side of the compressor. Therefore allowing the turbocharger to spool up faster than if there was no pre-existing vortex. What I would like to know, is that would these fins create enough of a "vortex" to make a measurable gain in performance? Does creating a "vortex" actually help the air pass through the fins easier? Or would it be like going up stream in a motor boat?