I have moved the issue to "mechanical problems" since I think your consultation is more successful in this forum. It can also help anyone who reads it.
The discharge valve or Waste Gut is only necessary in the overall gasoline engines.
I briefly explain to you, in a turbo gasoline engine, when you cut gas, you close the gase butterfly in the collector, at that moment there is a tremendous emptiness after the butterfly and a considerable increase in pressure in front of it. As a result, the turbo, which also on the turbine side has stopped receiving the blow of the exhaust gases, is greatly braking, so that when you accelerate again, the engine is lazy until the turbo is thrown again.
To prevent this from passing, the discharge valve is installed that what it does is "throw" the turbo air to the street or readmit it to the turbo compressor entrance to the gasoline injection engines to prevent the flowmeter from measuring over the real value when you close the gas butterfly.
The discharge valve consists of a body divided into two by a membrane on which a tarado spring acts, on one of the membrane faces acts the turbo pressure and on the spring's face, it also also acts the strength of the admission void, so that it only opens when the blow pressure is high and the emptiness after the gase butterfly is also high, (that is, it is high (that is to say, it is also high, (that is, it is high, it is high, it is high, it is high.
In a diesel engine this is of no use since they have no gas butterfly and all the air that the turbo can blow will be aspirated by the engine. So that the turbo does not stop when you reduce marching.
You are not going to increase the power because it has a discharge valve and I do not think you can make it jump because you need empty in admission, so you better leave it as it is.
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04 Aug.25