Top Fuel

Top-Fuel Racing refers to a class of drag racing in which the cars are run on 85% nitromethane and about 15% methanol also known as racing alcohol, instead of gasoline. The nitromethane used to power the engines of top fuel dragsters costs about US$30 per U.S. gallon (US$8/L). Top Fuel dragsters use between 10 and 12 U.S. gallons (38 to 45 L) of fuel for a complete pass, including the burnout, backup to the starting line, and quarter-mile run. The engine makes about 3.4 times as much power as a similar displacement engine running gasoline.

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The engines are purpose-designed V8 engines, whose basic design is descended from the Chrysler Hemi engine. The engines can typically produce at least 8,000 horsepower (6000 kW). The supercharger alone requires 1500 horsepower (1100 kW) to turn it to generate the great intake manifold pressures for the engines. While going down the track the engines run on the verge of hydraulic lock (that is, the air-fuel mixture is compressed so much it is almost a liquid). Two spark plugs per cylinder are the rule, with some teams experimenting with three. The spark plug electrodes are completely consumed during a run, but spark ignition is not necessary after the first half of the pass, since the motor is dieseling (igniting the air-fuel mixture without the help of a spark) because of the compression and extremely hot exhaust valves. After each pass, the whole engine is taken apart and gone through, and much of it is replaced. The engine is therefore designed for quick and easy disassembly and reassembly. On average, each run costs about $2,000 - $3,000.

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These cars compete in a 1/4 mile (0.4 km) race and complete it in less than 4.5 seconds at upwards of 330 mph (530 km/h). Top Fuel dragsters are the fastest linear accelerating vehicles in the world. A Top Fuel dragster accelerates from 0 to 100 mph (160 km/h) in less than 0.8 second, almost 11 seconds quicker than it takes a production Porsche 911 Turbo to reach the same speed. They can exceed 280 mph (450 km/h) in just 660 feet (0.2 km).

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Drag racing: Drag racing is a form of auto racing in which cars or motorcycles attempt to complete a fairly short, straight and level course in the shortest amount of time, starting from a dead stop. Drag racing originated in the United States and is still the most popular there. The most common distance is on...

Nitromethane: Nitromethane is a chemical compound with chemical formula CH3NO2....

Gasoline: :Petrol (petroleum spirit) redirects here. For the seabird, see petrel, spelt with an 'e'....

Top Fuel related Images and Photos (experimental)

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