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Message: [QUOTE="TooMuch03, post: 565621, member: 5993"] I have talked to several people who build and/or tune compound VGT setups on duramaxes, like Industrial Injection and Duramax Tuner. They never use a wastegate around the VGT, whether it is a stock or upgrade one. They said that it is far to difficult to control the VGT vanes when you can't 100% know exactly what the wastegate is going to do. According to the guys at Duramax Tuner, the vanes can be opened enough to be as effective as a wastegate at relieving backpressure on the high pressure turbo. I am no tuner or expert on this by any means, just relaying information that I have been told, for food for thought. [/QUOTE]

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