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I am not disagreeing, you posted that the vanes in the turbo and a waste gate are the same thing, they are not.
Thanks for the reply. I have done further research and now realize that the turbo through the use of the variable vanes increases the boost and hence pressurizes the cylinders to create greater resistance.
In essence and to a lesser extent a waste gated vehicle does the same thing through an increase in back pressure but does nothing to increase intake pressure. My original statement was that variable vanes created additional back pressure which is partially correct but their primary braking effect is through greater compression of intake air, something the waste gate cannot do. I never stated that waste gates and variable vanes are the same thing. I did state, although not fully correct, that the results were the same by increasing back pressure engine braking was accomplished. Until late last night I did not realize the full effect by the vgt in added compression. I have always known the hardware and technology to be completely different but I did miss the added benefit of the compressor.