Mercedes Mullins
Top Fuel dragsters are some of the fastest-accelerating machines in the world, capable of covering a drag strip in less than 3.7 seconds at speeds of over 330 mph. These dragsters are powered by supercharged and fuel-injected 500-cubic-inch adaptations of the famed Chrysler Hemi engine, burning up to 15 gallons of nitromethane fuel during a single run. Under full throttle, a dragster engine consumes 1.5 gallons of nitro per second, the same rate of fuel consumption as a fully loaded 747 but with four times the energy volume.
| Characteristics | Values |
|---|---|
| Fuel consumption per second | 1.5 gallons of nitro |
| Fuel consumption per run | 15-20 gallons |
| Fuel consumption per minute per cylinder | 8 gallons |
| Horsepower | 7,000 |
| Weight | 2,330 pounds |
| Length | 25 feet |
| Top speed | 330 mph |
| Time taken to reach top speed | 3.7 seconds |
| Fuel | Nitromethane |
| Fuel pump capacity | 65 gallons per minute |
| Fuel-line pressure | 400-500 pounds |
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What You'll Learn
- A Top Fuel dragster consumes 1.5 gallons of nitromethane per second
- A Top Fuel dragster's fuel pump delivers 65 gallons per minute
- A Top Alcohol Dragster may use a methanol-burning engine
- A Top Fuel dragster's engine can only be shut down by cutting off its fuel flow
- A Top Fuel dragster can burn up to 15 gallons of nitromethane fuel per run
A Top Fuel dragster consumes 1.5 gallons of nitromethane per second
The nitromethane-powered engines of these dragsters produce approximately 7,000 horsepower, which is about 37 times that of an average street car. To put it into perspective, a single cylinder out of the eight cylinders in a Top Fuel dragster produces 750 horsepower, matching the entire horsepower output of a NASCAR engine. The fuel efficiency of these engines is remarkably low, with a stoichiometric (exact) air/fuel mixture ratio of 1.7:1 for nitromethane.
The supercharger on a Top Fuel dragster demands more power than a stock hemi engine can generate. Under full throttle, the supercharger forces 3000 CFM of air into the cylinders, compressing the fuel mixture into a near-solid form before ignition. The spark plug electrodes are completely consumed during a pass, and the engine can only be shut down by cutting off the fuel flow. The intense combustion of nitromethane produces a yellow flame, and the white flame visible above the stacks at night is caused by raw burning hydrogen dissociated from atmospheric water vapour.
Top Fuel dragsters are constructed of chromoly steel tubing and carbon-fiber composite, weighing around 2,330 pounds when race-ready. These vehicles are among the fastest-accelerating machines in the world, often referred to as the "kings of the sport." They are powered by supercharged and fuel-injected 500-cubic-inch adaptations of the famed Chrysler Hemi engine. While the fuel consumption per second may seem extraordinary, the total fuel usage during a single run is typically between 15 and 20 gallons.
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A Top Fuel dragster's fuel pump delivers 65 gallons per minute
The fuel pump plays a critical role in delivering the necessary fuel to the engine, which consumes an astonishing 1.5 gallons of nitromethane per second when under full throttle. This fuel consumption rate is comparable to that of a fully loaded 747 jetliner, but with four times the energy volume. The nitromethane-powered engines of these dragsters produce approximately 7,000 horsepower, which is about 37 times that of an average street car.
Each cylinder of the eight cylinders in a Top Fuel dragster produces 750 horsepower, matching the entire horsepower output of a NASCAR engine. The fuel pumps are designed to deliver 8 gallons per minute to each cylinder, contributing to the overall impressive performance of these vehicles.
The construction of Top Fuel dragsters also contributes to their remarkable speed and power. Made from chromoly steel tubing and carbon-fiber composite, these vehicles weigh around 2,330 pounds and are 25 feet long. The supercharged and fuel-injected 500-cubic-inch engines are adapted from the renowned Chrysler Hemi engine.
In summary, the fuel pump's capacity of 65 gallons per minute is a key factor in enabling Top Fuel dragsters to achieve their extraordinary speeds and performance. With their powerful engines, advanced construction, and high-performance fuel systems, these dragsters truly deserve their reputation as the "kings of the sport".
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A Top Alcohol Dragster may use a methanol-burning engine
Top Alcohol Dragsters may look like Top Fuelers, but they have significant differences. Top Fuelers use supercharged, nitro-burning engines, whereas Top Alcohol Dragsters may use a methanol-burning engine.
Top Alcohol Dragsters are restricted to a maximum wheelbase of 300 inches, and their performances can be in the 5.1s at more than 285 mph. They are similar in appearance to their nitro-burning Funny Car counterparts, but Top Alcohol Funny Cars are restricted to the use of methanol fuel and have a three-speed transmission.
Methanol-burning engines in Top Alcohol Dragsters can produce approximately 4,000 horsepower. This is significantly less than the 7,000 horsepower produced by nitromethane-powered engines in Top Fuel Dragsters, which is about 37 times that of the average street car.
Top Fuel Dragsters can burn up to 15 gallons of nitromethane fuel during a single run. Under full throttle, a dragster engine consumes 1.5 gallons of nitro per second, the same rate of fuel consumption as a fully loaded 747 but with four times the energy volume.
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A Top Fuel dragster's engine can only be shut down by cutting off its fuel flow
Top Fuel dragsters are the quickest-accelerating racing cars in the world and the fastest sanctioned category of drag racing. They are capable of covering the dragstrip in less than 3.7 seconds at more than 330 mph. They are powered by supercharged and fuel-injected 500-cubic-inch adaptations of the famed Chrysler Hemi engine.
The engine of a Top Fuel dragster generates around 150 dB of sound at full throttle, enough to cause physical pain or even permanent damage. Before a run, race announcers usually advise spectators to cover or plug their ears. Ear protection is often handed out to fans at the entrance of a Top Fuel event.
The nitromethane-powered engines of Top Fuel dragsters produce approximately 7,000 horsepower, about 37 times that of the average street car. One cylinder of the eight cylinders of a Top Fuel dragster produces 750 horsepower, equaling the entire horsepower output of a NASCAR engine. Under full throttle, a dragster engine consumes 1.5 gallons of nitro per second, the same rate of fuel consumption as a fully loaded 747 but with four times the energy volume.
The supercharger takes more power to drive than a stock Hemi makes. The fuel pumps can pump 8 gallons per minute for each cylinder. A Top Fuel dragster can burn up to 15 gallons of nitromethane fuel during a single run.
Due to the high temperatures and pressures involved in the operation of a Top Fuel dragster engine, the engine can only be shut down by cutting off its fuel flow. The spark plug electrodes are totally consumed during a pass. After halfway through the run, the engine is dieseling from compression and the glow of the exhaust valves at 1400 degrees F. If the spark momentarily fails early in the run, unburned nitro builds up in the cylinders and then explodes with a force that can blow cylinder heads off the block in pieces or blow the block in half.
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A Top Fuel dragster can burn up to 15 gallons of nitromethane fuel per run
Top Fuel dragsters are among the fastest-accelerating machines in the world. They are capable of covering a dragstrip in less than 3.7 seconds at speeds exceeding 330 mph. These dragsters are powered by supercharged and fuel-injected 500-cubic-inch adaptations of the famed Chrysler Hemi engine. They burn up to 15 gallons of nitromethane fuel per run, with each cylinder receiving 7-8 gallons per minute.
The nitromethane-powered engines of NHRA Top Fuel dragsters and Funny Cars produce approximately 7,000 horsepower, which is about 37 times that of the average street car. To put this into perspective, one cylinder of the eight cylinders in a Top Fuel dragster or Funny Car produces 750 horsepower, equaling the entire horsepower output of a NASCAR engine.
Under full throttle, a dragster engine consumes 1.5 gallons of nitromethane per second, the same rate of fuel consumption as a fully loaded 747 but with four times the energy volume. The fuel-line pressure for NHRA Top Fuel dragsters and Funny Cars is between 400 and 500 pounds. The supercharger takes more power to drive than a stock Hemi makes.
Top Alcohol Dragsters may look like Top Fuelers, but they differ significantly in their engine and fuel usage. While Top Fuelers use supercharged, nitro-burning engines, Top Alcohol Dragsters may use a supercharged methanol-burning engine or an injected nitromethane combination.
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Frequently asked questions
A dragster can use up to 15–20 gallons of nitromethane fuel during a single run.
A dragster engine consumes 1.5 gallons of nitromethane per second when at full throttle.
The fuel mixture of a dragster is mostly nitromethane, with the rest being alcohol or methanol.
A dragster engine consumes 22.75 gallons of fuel during warm-up, burnout, staging, and the quarter-mile run.
A dragster can reach speeds of over 300 miles per hour in just 4.5 seconds.
