top fuel dragster engine specs

The oil system has a wet sump which contains 16 US quarts (15 l) of SAE 70 mineral or synthetic racing oil. A Top Fuel engine generates a BMEP of 1450 psi, making the combustion chamber one of the most inhospitable environments in the solar system. In a typical run the engine can consume between 12 US gallons (45 L) and 22.75 US gallons (86.1 L) of fuel during warmup, burnout, staging, and the quarter-mile run. There are three approved suppliers of these custom blocks. [citation needed] Compression ratio is about 6.5:1,[citation needed] as is common on engines with overdriven Roots-type superchargers. There are five main bearing caps, which are fastened with aircraft-standard-rated steel studs, with additional reinforcing main studs and side bolts("cross-bolting"). The engines use 42 mechanical fuel injectors with a mechanical fuel pump capable of pumping 100 gallons of fuel per minute. In some cases, teams are required to use technologies that may be decades old,[which?] However, while some basic facets of engine configuration are heavily restricted, other technologies, such as fuel injection, clutch operation, ignition, and car materials and design, are under constant development.[6]. ", "FORGET 8,000 HORSEPOWER ... TOP FUEL IS NOW OVER 10,000 HORSEPOWER! The manifold is fitted with a 200 pounds per square inch (1,400 kPa) burst plate. The size and weight of funny cars is regulated very closely. The massive airfoil over and behind the rear wheels produces much more, peaking at around 12,000 pounds-force (53 kN) when the car reaches a speed of about 330 mph (530 km/h). At maximum pressure, it takes approximately 1,000 horsepower (750 kW) to drive the supercharger. They can go from 0 to 60 mph in half a second. Valve sizes are around 2.45 in (62.2 mm) for the intake and 1.925 in (48.9 mm) for the exhaust. The block and heads are usually made by Brad Anderson or Alan Johnson. Since 2015, NHRA regulations limit the composition of the fuel to a maximum of 90% nitromethane; the remainder is largely methanol. The lightweight drag rails can travel a quarter-mile in 4.4 seconds while achieving speeds of more than 335 mph. NHRA Top Fuel dragsters are the world's fastest accelerating land vehicles. These engines put out an extremely large amount of horsepower, some at approximately 2500 to upwards of 4000 H.P. The supercharger is slightly offset to the rear to provide an even distribution of air. The plugs are placed in such a way that they are cooled by the incoming charge. These projects include turning a 500-pound billet into a streamlined Top Fuel dragster engine block. First formulated in the 1800s, the nitration process produces CH3NO2, which is used as an organic solvent in the chemical industry. A top fuel dragster accelerates from a standstill to 100 mph (160 km/h) in as little as 0.8 seconds (less than one third the time required by a production Porsche 911 Turbo to reach 60 mph (100 km/h))[1] and can exceed 280 mph (450 km/h) in just 660 feet (200 m). They are the most famous and recognizable class of drag racing cars, known around the globe. Securing the heads to the block is done with aircraft-rated steel studs and stud nuts. The engine is cooled by the incoming air/fuel mixture and the lubricating oil. The roller lifters are 1.68 inches in diameter with a valve lift of .8. A sound that intense is not just heard, but also felt as pounding vibrations all over one's body, leading many[who?] Normal ignition timing is 58-65 degrees BTDC (This is dramatically greater spark advance than in a petrol engine as "nitro" and alcohol burn far slower). They also mandated enclosed roll cages.[10]. In 1958, NHRA banned nitro in all categories; the American Hot Rod Association (AHRA) still allowed it, and Fuel Dragsters (FD), Hot Roadsters (HR), and Fuel Coupés (FC): this led to Fuel Altereds (AA/FAs), Factory Experimentals (A/FXs), and (ultimately) Funny Cars (TF/FCs). It was having trouble attracting full sixteen-car fields, leading to cutting back to eight-car rosters, while the International Hot Rod Association dropped Top Fuel entirely. The Ultimate Challenge. Due to the relatively slow burn rate of nitromethane, very rich fuel mixtures are often not fully ignited and some remaining nitromethane can escape from the exhaust pipe and ignite on contact with atmospheric oxygen, burning with a characteristic yellow flame. [citation needed] The first female driver in the Top Fuel category is also the most associated female in the drag racing world, Shirley Muldowney, who won three championships during her career. Top Fuel cars run on a mixture of approximately 90 percent nitromethane and 10 percent methanol called nitro. ENGINE: 1 Like the original Hemi, the racing cylinder block has a deep skirt for strength. Absolute manifold pressure is usually 56–66 pounds per square inch (390–460 kPa), but up to 74 pounds per square inch (510 kPa) is possible. Dragsters are limited to a maximum wheelbase of 300 inches (760 cm). The run including tire warming is about 100 seconds which results in a "lap" of about three minutes. [21][22], In 1984, Top Fuel was at a low point. Exhaust temperature is about 500 °F (260 °C) at idle and 1,796 °F (980 °C) by the end of a run. While others had been developed in the previous decade, it was the first successful one, winning the 1971 NHRA Winternationals. That surpasses even the most optimistic of estimates that the drag racing industry has tossed around for the past quarter century. As such, they, too, lack water jackets and rely entirely on the incoming air/fuel mixture and lubricating oil for their cooling. vehicles- Section 1A and 1B of the NHRA Rulebook- with the following exceptions. They are called "zoomies" and exhaust gases are directed upward and backwards. The NHRA also mandated that different rear tires be used to reduce failure, and that a titanium "shield" be attached around the back-half of the roll-cage to prevent any debris from entering the cockpit. Any breakthrough or invention that is likely to contribute to driver, staff, and spectator safety is likely to be adopted as a mandated rule for competition. resulting in cars that may seem substantially less advanced than the average family car. The engine will slurp about 1.75 gallons during the burnout and run. [11], Independent drag strips, not NHRA sanctioned, offered venues for the fuel racers. This "oil scraping" also provides a key heat removal step for the cylinder walls and piston skirts, the oil film is renewed as the piston moves upward after BDC. The International Hot Rod Association, which now sanctions Top Fuel in Australia, dropped the 1/4 mile distance in September 2017 after Santo Rapisarda, a car owner who often runs NHRA races in the United States, pushed for the change. Of course, those output figures are extrapolated based on time, speed, distance, and weight, because there isn’t a dynamometer in the world capable of verifying those numbers. On Friday, Brittany Force strapped into her Top Fuel dragster at Las Vegas Motor Speedway, waited for the lights to go out and pinned it. A 55-gallon drum of nitromethane today costs about $900. A funny car can have a wheelbase no longer than 125 inches and no shorter than 100 inches. Before their run, racers often perform a burnout in order to clean and heat tires. Requirements for Top Dragster are the same as those for E.T. In recent years, only exhibition races in Martin, Michigan's, US 131 Motorsports Park are run as Top Fuel races to the quarter-mile. As of 2010, a typical chassis cost approximately $20,000 and included extra items such as roll cage elements, fuel tanks and parachute-release levers. It must be concealing some kind of proprietary design to help this engine make an estimated 11,000 horsepower (8,202 kilowatts). It's like lighting a match in a room full of explosives to see where the door is. Intake and exhaust rockers are billet. The calculated power output of these engines is most likely somewhere between 8,500 and 10,000 hp (6,340 and 7,460 kW),[7] which is about twice as powerful as the engines installed on some modern diesel locomotives, with a torque output of approximately 7,400 pound force-feet (10,000 N⋅m)[8] and a brake mean effective pressure of 1,160–1,450 psi (8.0–10.0 MPa). * Under full throttle, a dragster engine consumes 1 1/2 gallons of nitro per second, the same rate of fuel consumption as a fully loaded 747 but with 4 times the energy volume. After each lap, the entire engine is disassembled and examined, and worn or damaged components are replaced. Measuring the power output of a top fuel engine directly is not always feasible. Based on readings from a torque sensor developed by AVL Racing, the US Army Top Fuel dragster recorded a peak 11,051 horsepower during a recent test in California. The typical Top Fuel engine displaces 496 cubic inches. However, this mixture is not mandatory, and less nitromethane may be used if desired. At the races, it's all about teamwork. Mandatory safety rules require a secured Kevlar-style blanket over the supercharger assembly as "blower explosions" are not uncommon, from the volatile air/fuel mixture coming from the fuel injectors being drawn directly through them. Antron captured the NHRA Top Fuel World Championship in 2012 driving the Toyota-powered Matco Tools dragster for Don Schumacher Racing. In some cases, teams are required to use technologies that may be decades old, resulting in cars that may seem substantially less advanced than the average family car. At present, final drive ratios higher than 3.20 (3.2 engine rotations to one rear axle rotation) are prohibited, in an effort to limit top speed potential, thus reducing the level of danger. Under full throttle a modern top fuel dragster engine burns approx.11 gallons of fuel a minute. [13] Bob Hansen won Top Fuel Eliminator (TFE) in his A/HR, with a speed of 136 mph (219 km/h). The engine is warmed up for about 80 seconds. In 1989 the McGee Cams dragster set track records at Famoso Raceway and LACR.

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