army_greywolf
New member
in the cases your referring to the turbocharger is used to compensate for a economy oriented camshaft so the motor maintains N/A expected power at similar displacement but effectively gets better gas mileage. similar in effect to turbocharging a prius....yea. Also in todays engines the use of camshaft phase timing and multiple spark/injection event per cycle produces better mileage allowing a car to be run VERY lean and not overheat doing it.
There is a formula out there, it's based on an engine calibration that runs the engine at it's optimum V/E rpm at 80% load where fuel consumption is measured against aggregate total output at the crankshaft. This is the only real measurement to use in determining actual "fuel economy" and can be done on a dyno measuring fueling rate (injector pulse widthXpsiXpounds per hour rating) against your output minus parasitic drag measurement (also done on the dyno). The rating is fuel amount per horsepower per hour, usually xxHP/GPH and yes you can have your engine tested under this standard, I'll find an article for the SAE testing and paste it here.
There is a formula out there, it's based on an engine calibration that runs the engine at it's optimum V/E rpm at 80% load where fuel consumption is measured against aggregate total output at the crankshaft. This is the only real measurement to use in determining actual "fuel economy" and can be done on a dyno measuring fueling rate (injector pulse widthXpsiXpounds per hour rating) against your output minus parasitic drag measurement (also done on the dyno). The rating is fuel amount per horsepower per hour, usually xxHP/GPH and yes you can have your engine tested under this standard, I'll find an article for the SAE testing and paste it here.