Turbine not turbo

Not sure if this exists but if a person was to hook up some sort of electrical turbine at the middle or maybe even the end of the exhaust, to create a Vacuum, and i mean a lot of vacuum, such as 5 to 25 inches of vacuum, wouldn't this free up a ton of horse power, you could even hook up a turbo to boost intake pressure. Point being that is you could get the engines stress level to a minimum then would you stomped down on it, in theory it should be like practically adding a second engine. Only problem i see with this is that your rings might not hold up, and you would have a severe problem when deaccelerating. But if a person was to use a rotary engine then the vacuum effect of the turbine should really make the engine scream something fierce. unlimited horsepower {well almost} should be at the fingertips of a boost and vacuum adjustment switch., All in theory of course. Give me some feedback..I think it would work..Not all the details are given here but you got the general idea.