Definiton of acceleration!

Stroked68

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Just watched Ford and Team John Force win at Pomona! Robert Hight won! I was doin some searching on what Ford teams there were in top fuel. Found out that Ford will actually have their own motor called the "Boss 500". Guess most of the motors people use are Chrysler Hemi's or close to it. Happened across this interesting and amazing fact sheet about dragsters. Good reading!:sweet

One top fuel dragster 500 cubic inch Hemi engine makes more horsepower than the first 4 rows of stock cars at the Daytona 500.

It takes just 15/100ths of a second for all 6,000+ horsepower of an NHRA Top Fuel dragster engine to reach the rear wheels.

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's supercharger.

With 3,000 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 (stoichiometry: methodology and technology by which quantities of reactants and products in chemical reactions are determined) 1.7:1 air/fuel mixture of nitro methane, the flame front temperature measures 7,050 deg F. [/SIZE]

Nitro methane 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 halfway, the engine is dieseling from compression, plus the glow of exhaust valves at 1,400 deg 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.

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.

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

Top fuel engines turn approximately 540 revolutions from light to light! Including the burnout, the engine must only survive 900 revolutions under load. The redline is actually quite high at 9,500 rpm.

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

The current top fuel dragster elapsed time record is 4.428 seconds for the quarter mile (11/12/06, Tony Schumacher, at Pomona , CA ). The top speed record is 336.15 mph as measured over the last 66' of the run (05/25/05 Tony Schumacher, at Hebron , OH ).

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 pass 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 1,320 foot long race course.

...... And that my friends, is ACCELERATION!*

Now don't you feel better just knowing that little bit of info?"
 

DaveBen

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I got 701 revolutions in a 4.428 second run, light to light. That is hard to beleive it is that few revolutions.

Dave
 

JLDickmon

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I get more like 2100 revolutions in 4.5 seconds..
maybe 540 revs is the tires?
205/70R14 turns 741 revs in a mile...
 

DaveBen

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I took 9500 rpm as the engine speed over the run. (9500rpm/60seconds) X 4.45seconds = 704 revolutions.

Dave
 

JLDickmon

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so I'm a product of a public school education..

those engines are also sans cooling system.
the reason they're torn down between runs, is to cool the parts off.
 

BIG JOE

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My Definition of Acceleration, based on my edumacations iz: The :D I git.

:)
 

Stroked68

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I also found a video on the amount of fuel one cylinder gets at idle then when its runnin down the truck. They had a cylinder cut out hooked up to one of the dragsters fuel pumps and omg! Cant believe how much fuel is dumped into those cylinders!:eek: Amazing. Fastest motors on the planet baby! Now thats AMERICA!:sweet
 

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