[caffeineaholic]

Hi all,

(I have looked in some detail at how superchargers and turbochargers work. I also searched the forum but haven't found anything that helps me make sense of my confusion.)


I have heard that turbochargers increase engine efficiency (not just power) and fuel economy. How can this be (if it is true)? Forced induction adds more air to an engine, or the availability of air to be sucked in the combustion chamber. The amount of fuel must be increased to compensate for the extra air. Because more air and fuel is required doesn't this keep the engine efficiency just where it would be without a turbocharger since more input (A/F mix) is required to achieve more output (Power) with a turbocharger? Additionally, turbochargers must add some backpressure right?


Is there something I am not thinking of? Does it come down to little technicalities that I'm not seeing? Am I not seeing the big picture?

Thanks.