to compare the experience of watching a Top Fuel dragster make a pass to 'feeling as though the entire drag strip is being bombed. The lightweight drag rails can travel a quarter-mile in 4.4 seconds while achieving speeds of more than 335 mph. , Independent drag strips, not NHRA sanctioned, offered venues for the fuel racers. … 3.6 seconds. Fuel is injected by a constant flow injection system. NHRA Top Fuel teams get 75 minutes between rounds to do a complete engine rebuild. Haul your horses with this Ferrari 412 pickup conversion, Wrenchin’ Wednesday: Efficient, no-mess grease packing, Chip Foose reimagines the iconic Jaguar E-type, Chip Foose reinvents the 1966 Ford Bronco with street-savvy style, First wash in 40 years: Detailing our Barn Find Chevy with Larry from Ammo NYC | Redline Update, Moving a Ferrari and a Cobra to get to a Triumph and Morgan Plus 8 | Barn Find Hunter – Ep. The laminar flame speed and combustion temperature are higher than gasoline at 0.5 m/s (1.6 ft/s) and 2,400 °C (4,350 °F) respectively. The plugs are placed in such a way that they are cooled by the incoming charge. How is nitrous used in stock cars if the driver has it installed. It has press-fitted, ductile iron liners. Thus, to attain maximum performance, before each race, by varying the level of fuel supplied to the engine, the mechanical crew may select power outputs barely below the limits of tire traction. Q: How long does a Top Fuel piston last? Jon C. 3,214 posts ... Steve Read conducted an impromptu experiment along these lines last year in … 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. , Like many other motor sport formulas originating in the United States, NHRA-sanctioned drag racing favors heavy restrictions on engine configuration, sometimes to the detriment of technological development. This means that a "fueler" engine will provide power over a very broad range from very lean to very rich mixtures. There is an engine driven mechanical fuel pump and about 42 fuel nozzles. Larger bores have been shown to weaken the cylinder block. 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). While nitromethane has a much lower energy density (11.2 MJ/kg (1.21 Mcalth/lb)) than either gasoline (44 MJ/kg (4.8 Mcalth/lb)) or methanol (22.7 MJ/kg (2.46 Mcalth/lb)), an engine burning nitromethane can produce up to 2.4 times as much power as an engine burning gasoline. . Power outputs which create tire slippage will "smoke the tires" and as a result the race is often lost. These superchargers are in fact derivatives of General Motors scavenging-air blowers for their two-stroke diesel engines, which were adapted for automotive use in the early days of the sport. ", "FORGET 8,000 HORSEPOWER ... TOP FUEL IS NOW OVER 10,000 HORSEPOWER! Seats are of ductile iron. Multiply by 4.5 seconds = 600 rpqm. The shortening of the distance was used by the FIA at some tracks, and as of 2012 is now the standard Top Fuel distance defined by the FIA. The ignition system provides initial 60,000 volts and 1.2 amperes. Such is the strength of a top fuel crankshaft that in one incident, the entire engine block was split open and blown off the car during an engine failure, and the crank, with all eight connecting rods and pistons, was left still bolted to the clutch. 0.3 seconds. At temperatures over 30˚ Celsius, diesel typically lasts six to twelve months. Much of organized drag-racing is sanctioned by the National Hot Rod Association. That compression of the tire expands the contact patch to almost 250 square inches—larger … Top Fuel dragsters are the NHRA's loudest cars, in part because of the way the engine is mounted. He also noted that torque specs for the engine internals are much higher than in a stock engine—cylinder heads are ran down to 140 lb-ft of torque compared 85 lb-ft on a regular Hemi. This also was the result of the fatal crash at Gateway International Raceway. As the increased engine speed builds up pump pressure, the mixture is made leaner to maintain a predetermined ratio that is based on many factors, especially race track surface friction. This is made possible by the fact that, in addition to fuel, an engine needs oxygen in order to generate force: 14.7 kg (32 lb) of air (21% oxygen) is required to burn one kilogram (2.2 lb) of gasoline, compared to only 1.7 kg (3.7 lb) of air for one kilogram of nitromethane, which, unlike gasoline, already has oxygen in its molecular composition. After 100 years the engine will only have 10,000 miles on it.  (Nix tried to persuade Chrisman to get Mercury Racing Director Fran Hernandez to allow him to run his Comet's 427 on nitro, as a way to gain leverage on NHRA, so Nix could use nitro himself). Securing the heads to the block is done with aircraft-rated steel studs and stud nuts. They inspect for microfracture after each run to hope for 3 runs. While many of the parts look brand new as they go back together, our rebuild showcases a balance of refurbished parts and new. - posted in The Nostalgia Forum: When was the last time that a front-engined slingshot Top Fuel dragster competed in a NHRA event? Since 2015, NHRA regulations limit the composition of the fuel to a maximum of 90% nitromethane; the remainder is largely methanol. 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. The pump can flow 100 US gallons (380 l) per minute at 7500 rpm and 500 psi (3,400 kPa) fuel pressure. Because of the speeds, this class exclusively races to only a 1,000 foot (305 m) distance, and not the traditional 1,320 feet (400 m). Valve retainers are also made of titanium, as are the rocker covers. The long duration spark (up to 26 degrees) provides energy of 950 millijoules (0.23 calth). Billet steel crankshafts are used; they all have a cross plane a.k.a. 6 seconds. 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 manifold is fitted with a 200 pounds per square inch (1,400 kPa) burst plate. Since 1955, the association has held regional and national events (typically organized as single elimination tournaments, with the winner of each two car race advancing) and has set rules for safety, with the more powerful cars requiring ever more safety equipment. Is it a constant flow or is it staged or what? After the warm up the valve covers are taken off, oil is changed and the car is refueled. 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. Pistons are made of forged aluminum. Complaints from teams in regards to cost, however, has resulted in the rule being rescinded starting in 2008, when the fuel mixture returns to 90%, as NHRA team owners, crew chiefs, and suppliers complained about mechanical failures that can result in oildowns or more severe crashes caused by the reduced nitromethane mixture. The pan is made of titanium or aluminum. Titanium can be used to prevent oil spills in the event of a blown rod. Of course, between each run the engine received a thorough refresh that included pistons, cylinder heads, a new supercharger belt, and a full tank of specially brewed oil. The ignition system limits the engine speed to 8400 rpm. 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. Before their run, racers often perform a burnout in order to clean and heat tires. With only 35 minutes or so between elimination rounds, any time they can get back by doing a task more efficiently is great.”. There it earned the #1 qualifier spot (to say he was a proud papa would be an understatement) before being knocked out in the second round. Thank you The dual valve springs are of coaxial type and made out of titanium. At peak power, each 62ci cylinder generates 1,000-plus horsepower, equaling 16 … , Jimmy Nix, who previously ran a Top Gas dragster; Jim Johnson, who ran a Dodge Polara stocker, and who had won the B/SA title in 1963; Jim Nelson; and Dode Martin pioneered TF/FC. Currently, the most prolific active driver in Top Fuel is Tony Schumacher, and the most successful crew chief is Alan Johnson, who was the crew chief for six of Schumacher's championships, the back-to-back titles won by driver Gary Scelzi and was the crew chief for his brother Blaine for his entire professional career. The intake valve is made from solid titanium and the exhaust from solid Nimonic 80A or similar.  Compression ratio is about 6.5:1, as is common on engines with overdriven Roots-type superchargers. The supercharger must be a 14-71 type Roots blower. However, this mixture is not mandatory, and less nitromethane may be used if desired. At maximum throttle and RPM, the exhaust gases escaping from a dragster's open headers produce about 900–1,100 pounds-force (4.0–4.9 kN) of downforce. 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.. The 426 Hemi-based engine block is aluminum, as are the supercharger, massive cylinder heads, and rods. "Winter Heat: '87 NHRA Wnternationals", in, Learn how and when to remove this template message, "The Mag: Drag racing, the loudest sport", "FORGET 8,000 HORSEPOWER ... TOP FUEL IS NOW OVER 10,000 HORSEPOWER! The tools aren’t expensive, but they are purpose-built by the team for one job only. How much fuel does a Top Fuel Dragster burn in one .250 mile run? Top Fuel monsters put on notice: 5,000-hp electric dragster has 8 world records in its sights The massive torque channeled through the rear axle shifts the load of the car rearward and tries to twist the tire on its 16-inch beadlock rim. Both during the teardown and reassembly, Davin was impressed with the specialty tools and rigorous strategy that Don Schumacher employs to made each task just a bit easier and faster. A Top Fuel engine will consume more than 14 gallons of fuel over the entire time from start-up to the finish line. Typical safety equipment for contemporary top fuel dragsters: full face helmets with fitted HANS devices; multi-point, quick release safety restraint harness; full body fire suit made of Nomex or similar material, complete with face mask, gloves, socks, shoes, and outer sock-like boots, all made of fire-resistant materials; on board fire extinguishers; kevlar or other synthetic "bullet-proof" blankets around the superchargers and clutch assemblies to contain broken parts in the event of failure or explosion; damage resistant fuel tank, lines, and fittings; externally accessible fuel and ignition shut-offs (built to be accessible to rescue staff); braking parachutes; and a host of other equipment, all built to the very highest standards of manufacturing. A 180 degree crankshaft is also about 10 kg (22 lb) lighter than 90 degree crankshaft, but they create a lot of vibration. I was wondering the other day about rpqm's. Power output can be increased by using very rich air-fuel mixtures.  These cars ran in NHRA's S/FX class, variously defined as "Super Factory Experimental" or "Supercharged Factory Experimental". Beryllium-copper has been tried but its use is limited due to its toxicity. The next event was at Bristol where it was #2 qualifier and ultimately went on to win the Wally for the weekend. Think of a 1916 car engine that is driven only 100 miles a year and put in storage after each use. When Hagerty resident wrench Davin Reckow called Don Schumacher Racing with the idea of doing a Redline Rebuild for one of its Top Fuel engines, we weren’t sure what the answer would be. The 54-year history of NHRA has provided hundreds of examples of safety upgrades. They are the most famous and recognizable class of drag racing cars, known around the globe. There are three approved suppliers of these custom blocks. The cost of a complete top fuel dragster engine is in the $58,000 range depending on options. This top fuel dragster quiz will amaze you with its raw power. 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. Ear plugs and even earmuffs are often handed out to fans at the entrance of a Top Fuel event. 180 degree crankshafts have been tried and they can offer increased power. A 4.1875-inch (106 mm) bore with a 4.5-inch (114 mm) stroke are customary dimensions. Cracking open the 500-cubic-inch V-8 was more of a lesson in heavy-duty parts. chassis: BME #02: engine displacement: 500 cubic inches: power: 10,000 horsepower at 8200 rpm: weight: 2350-lbs: wheelbase: 300 in. , In 1984, Top Fuel was at a low point. This how long does a top fuel dragster engine last is ignited by two 14 mm ( 0.55 in ) spark plugs per cylinder has been tried its... Five runs ] [ 22 ], in 1971, Don Garlits introduced the Swamp Rat XIV a... 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