Question:
Hi,
Is it true turbos use up alot more fuel then non-turbo cars? I understand that the turbo compresses more air into the cylinders and that the turbine is powered by the exhaust venting - please correct me if im wrong. Or is the fuel/air vapour being compressed, not plain air.
Thanks,
Adam
Answers:
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depends on the amount of horsepower/torque being required. A 2.0 liter non-turbo charged engine uses the same amount of fuel at the same engine turbo'd at 100 horsepower. the difference would be the rate of acceleration and max horsepower being requested and the added weight of the turbo components and the larger components to handle the increased cooling, torque/ horsepower, and speed. The turbo is run off the exhaust turning the turbine wheel that is on the same shaft as the compressor wheel that compresses the inlet air (plain air not air/fuel, the fuel is added later)that other bloke is on the right track, it will use more fuel yes, you are right about how a turbo works, the fuel is added to the compressed air, and not compressed its self. With a turbo more air goes in for the simple reason you can then put more fuel in, so less economy, but more power, a responsibly driven car is always going to get better economy than a thrashed car, but i know how your going to drive it, why else would you buy a turbo ;-)
if you "baby it " you should get better mileage , some early models used a blow through system where the carburetor was in a box and the air/fuel mix was pressurized , but with the perfection of fuel injection air only is compressed
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