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Acceleration

Spanky

Moderator
Staff member
Top Fuel dragsters are the quickest accelerating racing cars in the world and the fastest sanctioned category of drag racing, with the fastest competitors reaching speeds of 335 miles per hour (539 km/h) and finishing the 1,000 foot (305 m) runs in 3.64 seconds. Here are some fuel facts.

* One Top Fuel dragster 500 cubic-inch Hemi engine makes more horsepower (11,000 HP) than the first 4 rows at the Daytona 500.

* Under full throttle, a dragster engine consumes 11.2 gallons of nitro methane per second; a fully loaded 747 consumes jet fuel at the same rate with 25% less energy being produced.

* A stock Dodge Hemi V8 engine cannot produce enough power to merely drive the dragster's supercharger.

* With 3000 CFM of air being rammed in by the supercharger on overdrive, the fuel mixture is compressed into a near-solid form before ignition. Cylinders run on the verge of hydraulic lock at full throttle.

* At the stoichiometric 1.7:1 air/fuel mixture for nitro methane the flame front temperature measures 7050 degrees F.

* Nitromethane burns yellow. The spectacular white flame seen above the stacks at night is raw burning hydrogen, dissociated from atmospheric water vapor by the searing exhaust gases.

* Dual magnetos supply 44 amps to each spark plug. This is the output of an arc welder in each cylinder.

* Spark plug electrodes are totally consumed during a pass. After 1/2 way, the engine is dieseling from compression plus the glow of exhaust valves at 1400 degrees F. The engine can only be shut down by cutting the fuel flow.

* If spark momentarily fails early in the run, unburned nitro builds up in the affected cylinders and then explodes with sufficient force to blow cylinder heads off the block in pieces or split the block in half.

* Dragsters reach over 300 MPH before you have completed reading this sentence.

* In order to exceed 300 MPH in 4 seconds, dragsters must accelerate an average of over 4 G's. In order to reach 200 MPH well before half-track, the launch acceleration approaches 8 G's.

* Top Fuel engines turn approximately 480 revolutions from light to light!

* Including the burnout, the engine must only survive 900 revolutions under load.

* The redline is actually quite high at 9500 RPM.

* THE BOTTOM LINE: Assuming all the equipment is paid off, the crew worked for free, & for once, NOTHING BLOWS UP, each run costs an estimated $1,000 per second.

0 to 100 MPH in .8 seconds (the first 60 feet of the run)
0 to 200 MPH in 2.2 seconds (the first 350 feet of the run)
6 g-forces at the starting line (nothing accelerates faster on land)
6 negative g-forces upon deployment of twin ‘chutes at 300 MPH An NHRA Top Fuel Dragster accelerates quicker than any other land vehicle on earth . . quicker than a jet fighter plane . . . quicker than the space shuttle.

The current Top Fuel dragster elapsed time record is 3,628 seconds for the 1000' track (2018, Clay Millican). The top speed record is 336.57 MPH as measured over the last 66' of the run (2018, Tony Schumacher).

Putting this all into perspective:

You are driving the average $140,000 Lingenfelter twin-turbo powered Corvette Z06. Over a mile up the road, a Top Fuel dragster is staged to launch down a quarter-mile strip as you pass. You have the advantage of a flying start. You run the 'Vette hard up through the gears and blast across the starting line & pass the dragster at an honest 200 MPH. The 'tree' goes green for both of you at that moment.

The dragster launches & starts after you. You keep your foot down hard, but you hear an incredibly brutal whine that sears your eardrums & within 3 seconds the dragster catches & passes you.

He beats you to the finish line, a quarter-mile away from where you just passed him. Think about it - from a standing start, the dragster had spotted you 200 MPH & not only caught, but nearly blasted you off the road when he passed you within a mere 1000 foot long race! That's acceleration!
 
Cool information, or interesting information.
A friend (now deceased) Bob Grietz, from dragster fame, used to tell some wild stories about the engines that he built. Look him up sometime on Google.
 
Cool info. Sort of makes that 12 second gear grinding run in the old Chevelle seem anti climatic, lol... I often wonder how the pilots and drivers of such machines retain consciousness. I have a motorcycle that is pretty fast and has a lot of torque, for a bike, and under full acceleration, it actually makes my vision blurry, and feels like the verge of blinking out. That may be partially due to being un-young, and having a bumpy and road behind with some scars and injuries, but comparing it to a jet, rocket, or rail dragster.... those guys must be in good physical shape.
 
those guys must be in good physical shape.

These days, anyone who drives a race car - whether sprints, NASCAR, Indy cars or dragsters - must be in good physical shape. Modern cars are very fast, and also very demanding. They can't afford to let their guard down even for a moment or their life is in peril.
 
Used to watch the NHRA races all the time on TV, even got to a few live events.
Nothing like feeling that power!
I grew up in a small country town named Kirkersville, Ohio, and there is a drag strip nearby: National Trails. Every year they hosted the Spring Nationals, Mopar Nationals, Nights Under Fire, and numerous other events. The town was overtaken by the racers and fans during the events... The town had two bars, two carry outs, a gas station, and a Tasty Freeze ice cream store, that drew the crowds after racing. If we couldn’t get in via the gates, we knew how to access the grounds by following the back roads or the river and get in or hang out at the finish line. Fun memories.
 
I'm a native of Florida and lived in Orlando for a few years. There was an outlaw track outside of town that held races on what I think was an old airport runway. The races were at night, and for illumination they used a pair of those big mercury vapor 'searchlights' behind the starting line shining down the track. No big names ever appeared there, but the racing was fun and there were some really fast cars. There were no fences between the spectators and the track - really dangerous - but we were teenagers and didn't know any better. :rolleyes:
 
Been there, done that, Also had fires in two drums,, one on each side of the strip at the far end that you stayed between as pretty dark down there. Thinking that was at Sanford, FL Grew up in Daytona Beach.
 
I'm a native of Florida and lived in Orlando for a few years. There was an outlaw track outside of town that held races on what I think was an old airport runway. The races were at night, and for illumination they used a pair of those big mercury vapor 'searchlights' behind the starting line shining down the track. No big names ever appeared there, but the racing was fun and there were some really fast cars. There were no fences between the spectators and the track - really dangerous - but we were teenagers and didn't know any better. :rolleyes:
I’d give anything, everything, to go back and live that part again. If I had any clue how good those times would seem looking back, I would have spent much more time doing it.
 
Back when I lived in Kent, WA I owned a house that was about 1000 feet from the starting line at (Then called Seattle Intnl Raceways) Now called Pacific raceway. I lived there 25 years. I went to a lot of races and enjoyed the Nationals each year. One thing that was cool was they usually televised live Friday night qualifying. I was close enough to the starting line, that if there was a south wind blowing, I would get rubber smoke and nitro fumes blowing across my yard. I would throw open the south windows in my house and tune my TV to the Qualifying coverage and it was just like being in the stands, the smell of rubber and nitro and the thunder of the cars was awesome. I finally moved to a more quiet and mellow place here on the Ocean shore. at my age now I just listen to the ocean and breathe clean air.
 

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