Turbocharger Gasoline Fuel Consumption
Turbocharger Gasoline Fuel Consumption
(OP)
Say a gasoline engine produces 150 HP @ 4400 rpm and 180 lb.-ft. @ 4000 rpm. Now add a turbocharger that gives it an additional 60 HP. How much more gasoline would the engine need as it cruises down the highway at 60 mph (compared to the same engine with out a turbocharger)?
I don't need an exact answer. I'm trying to get an idea of how much gas it takes to get 60 HP out of a turbocharger running at peak performance.
I don't need an exact answer. I'm trying to get an idea of how much gas it takes to get 60 HP out of a turbocharger running at peak performance.





RE: Turbocharger Gasoline Fuel Consumption
To get the additional 60hp, you'll have to burn an additional 12 to 18 kg/hr of fuel (roughly). You won't be able to cruise at 60mph while using that additional 60hp (assuming the original vehicle could cruise at 60mph)- you'll have to cruise at a higher speed to use the extra power.
RE: Turbocharger Gasoline Fuel Consumption
If you do not drop the compression, you might need to run a more expensive fuel. It really does all depend on a lot that you have not disclosed.
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RE: Turbocharger Gasoline Fuel Consumption
As the others said, negligible
RE: Turbocharger Gasoline Fuel Consumption
The other aspect is slightly increased exhaust back pressure from the exhaust turbine. But, that is going to be fairly insignificant at small throttle openings, because exhaust flow will be very low. It is more a theoretical disadvantage, rather than a practical disadvantage.
RE: Turbocharger Gasoline Fuel Consumption
First of all, unless you really have a huge car (maybe several times the size of your jumbo size hummer) your engine will not produce anywhere near 150 hp to cruise at 60 mph.
Second, the typical car (non-hybrid) at "cruise" at 60 mph is only perhaps at one-quarter or one-third throttle.
Third, in a gas engine the turbocharger doesn't really become functional until the throttle is wide open. At cruise (or one-third throttle) the only effect of the turbocharger is to slightly increase exhaust backpressure and therefore decrease fuel efficiency.
RE: Turbocharger Gasoline Fuel Consumption
RE: Turbocharger Gasoline Fuel Consumption
Mike Halloran
Pembroke Pines, FL, USA