Macrobb
Full Access Member
It's more effecient at making 185hp(rated HP), and would have better brake-specific fuel consumption. The problem is, when cruising unloaded you probably only need 50HP from the engine to maintain speed, and NA, the engine has more than enough air to burn that much fuel cleanly... so, at that load, the engine will be slightly less effecient with the turbo.How can it be more efficient but not increase fuel economy?
Once you start maxing out the engine power doing something,then the turbo can add more air and burn more fuel effeciently... but the fuel economy of doing that is less. Break-specific fuel consumption would be better at a high load, but that still isn't a huge MPG number, because you are doing more work.