06 August 2013

Re-Post: Top Fuel Dragster Facts

-One Top Fuel dragster 500 cubic inch Hemi engine makes more horsepower than the first 4 rows at the Daytona 500. They have over half again as much horsepower in one cylinder as a Dodge Viper has in all ten. No one has ever successfully run one long enough on a dyno to get a horsepower reading. Current estimates are right around 6,000 horsepower.

-Under full throttle, a dragster engine consumes 1-1/2 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 drive the dragster supercharger. The fuel pump alone requires more horsepower to turn than the average street car produces.

-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.

-The 1.7:1 air/fuel mixture for nitro methane produces a flame front temperature measures 7050 degrees F.

-Nitro methane burns yellow. The spectacular white flame seen above the stacks at night is raw burning hydrogen, disassociated from atmospheric water vapour 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 the run, the engine is dieseling from compression plus the glow of exhaust valves at 1400 degrees F. The engine can only be shut down by running the car out of fuel. There is no way to cut off the fuel; the engine stops only when it blows or the tank runs dry.

-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.

-In order to exceed 300 mph in 4.5 seconds dragsters must accelerate an average of over 4G's. In order to reach 200 mph well before half-track, the launch acceleration approaches 8G's. To put this in perspective; a top fuel dragster, parked next to a Super Hornet on the steam catapult on the deck of an aircraft carrier, would be in the water and sinking before the Super Hornet was halfway down the deck.

-Dragsters reach over 300 miles per hour before you have completed reading this sentence.

-Top Fuel Engines only turn approximately 540 revolutions from light to light!

-Including the burnout, the engine must only survive 900 revolutions under load. They only survive about 80% of the time.

-Redline at 9500 rpm.

-Assuming all the equipment is paid off, the crew worked for free, and for once NOTHING BLOWS UP, each run costs an estimated $1,000.00 per second.

-The engine is entirely rebuilt every run, or every 900 revolutions. New pistons and rings, new rods, new rod bearings. Sometimes a new crank. The crew does this in about two hours between rounds.

-The current Top Fuel dragster elapsed time record is 4.441 seconds for the quarter mile. The top speed record is 333.00 mph (533 km/h) as measured over the last 66' of the run.

-Putting all of this 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 and ready 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 and past the dragster at an honest 200 mph. The 'tree' goes green for both of you at that moment. The dragster launches and starts after you. You keep your foot down hard, but you hear an incredibly brutal whine that sears your eardrums and within 3 seconds the dragster catches and 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 and not only caught, but nearly blasted you off the road when he passed you within a mere 1320 foot long race course. 

h/t MoBro


DR said...

Amazing technological achievement.

Teresa said...

I love drag racing. LOL.

Larry Sheldon said...

The most interesting view of a fuel dragster?

On short final.

Coming across the fence I (fortunately) realized that I was lined upon the drag strip, instead of the runway at San Fernando Airport.

I have no idea what the driver of the dragster thought.

For me it was a bowel-expanding experience.

Brock Townsend said...

I love drag racing

Me too. Totally bored by the others. Wish they would bring back Pinks.

Chickenmom said...

They are a lot of fun to watch - we used to go to Englishtown all the time when we were younger. Now only Hubby and oldest son go twice a year.

joated said...

With stats such as those you listed, II can only conclude that those who get into one of these machines for that 1/4 mile race are completely nuts!

They are exciting to watch, however.