positive:obviously the turbocharger paired with the engine increases the power output and speed
The quest for better turbocharger compressors
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typically there are large trade offs when having a turbo charger
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negative: unwanted emissions which contribute to decrease in engine performance
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with two turbochargers it may allow higher compressor-stage effincencies to be achieved
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to keep the turbochargers performance up most rely on heavy exhaust gas recirculation (EGR)
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designs have evolved to a point where a change in the overall design concept to improve one part of the design usually results in a negative outcome in some other area of the design
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based on engine downsizing focus is going to turbo aerodynamics to achieve better single stage compressors