Monday, September 27, 2010

The debate to keep the V8

When getting a car, you will find a lot of things you should always think about. One of them is fuel productivity. You need to always be mindful of what you’ll save at the pump when selecting a new car. The car industry definitely knows that. The bestselling cars in the world are small sedans with 4 cylinder or small 6 cylinder engines. Believe it or not, some autos can actually get good gas mileage with an 8 cylinder.

Easy science

Fuel efficiency, or gas mileage, is related to a simple principle of physics. It is called mechanical efficiency. Simply put, mechanical efficiency is the ratio of the energy used to achieve a task. The result tells you something. More energy used, equals less efficiency. The equation is easy:

Efficiency = Input/Output

In other words, a small engine that has to do more work than a larger engine for the same task could be a lesser amount of mechanically efficient. Thus, it will not perform as well. Performance affects other things. One of the large ones is gas mileage.

Larger is far better

The reason for a V8 is simple, in that they produce more horsepower. That said, motors that large aren’t used as widely too much anymore. Most applications for V8 engines are in already large cars. The Chevy Silverado 1500 has a V8 and gets 15 mpg. Nevertheless, here comes the twist. The Corvette has the same 6.2 L V8. Nevertheless, this is where the difference comes in. The Corvette gets 26 mpg. There is a good reason for it. The Corvette has a lesser amount of weight to pull.

{A lesser amount of work is also less strain|Efforts additionally is strain|Less effort means simpler efforts|Simpler signifies less stressful work|A lesser amount of strain equals more productivity

In a larger car, say a minivan or mid size SUV, if the car is pulling the driver and a full passenger and gear load, the gas mileage will actually drop drastically with the smaller, less-powerful engine. This benefit is realized by vehicles smaller than a full size, as the engine will not have to work as hard to pull the load and therefore be more efficient. The work and tension also signifies greater damage, so a more efficient engine also means a longer lifetime.

Additional reading

Wikipedia

en.wikipedia.org/wiki/Mechanical_advantage



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