Since a high performance turbocharger reduces engine lifetime, I had this idea.
The turbocharger turbine would be connected to a reductor instead of an air pump and then it would push an alternator. So, all parts that are normally connected directly to the engine, like oil pump, water pump, air conditioner compressor, power steering pump, would be pushed by electrical motors. The engine would get free from all that stuff without being damaged, and all the energy wasted in exhaust flow would be recycled by the turbo. Even the waste gate would not be necessary.
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