Author Topic: Top Fuel Dragster Fun Facts  (Read 2265 times)

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Offline Otto Puzzell

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Top Fuel Dragster Fun Facts
« on: October 02, 2008, 03:56:25 AM »
* One Top Fuel dragster 500 cubic inch Hemi engine makes more horsepower than the first 4 rows at the Daytona 500.

* Under full throttle, a dragster engine consumes 1½ gallons of nitromethane 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.

* 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 nitromethane 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.

* In order to exceed 300 mph in 4.5 seconds dragsters must accelerate at 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 red-line is actually quite high at 9500 rpm.
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Offline Ultra

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Re: Top Fuel Dragster Fun Facts
« Reply #1 on: October 02, 2008, 04:01:22 AM »
Only 900 revolutions under load.   :disbelief:

Great stuff, Karn.

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Offline Allan L

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Re: Top Fuel Dragster Fun Facts
« Reply #2 on: October 02, 2008, 06:11:56 AM »

* In order to exceed 300 mph in 4.5 seconds dragsters must accelerate at an average of over 4G’s. In order to reach 200 mph well before half-track, the launch acceleration approaches 8G’s.

300 m.p.h = 440 ft/sec.
440 ft/sec in 4.5 seconds = 97.7778 ft/sec/sec
g=32.18 ft/sec/sec therefore mean is 3.037g, not "over 4"

I'm sure the peak value is over 4, but not the "average"
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Offline neilshouse

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Re: Top Fuel Dragster Fun Facts
« Reply #3 on: October 02, 2008, 02:06:56 PM »
Amazing facts, thank you.

The one that amazed me the most was that a stock Dodge Hemi V8 engine cannot produce enough power to drive the dragster supercharger.

Offline Bezor

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Re: Top Fuel Dragster Fun Facts
« Reply #4 on: October 15, 2008, 01:24:43 AM »
Amazing facts, thank you.

The one that amazed me the most was that a stock Dodge Hemi V8 engine cannot produce enough power to drive the dragster supercharger.

Yes, that caught me back also!

Offline GRAYWOLF

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Re: Top Fuel Dragster Fun Facts
« Reply #5 on: January 31, 2009, 06:36:27 AM »
Is that the HEMI from 40 years ago or the current one?
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Offline Otto Puzzell

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Re: Top Fuel Dragster Fun Facts
« Reply #6 on: January 31, 2009, 06:56:04 AM »
Yes.
You wanna be the man, you gotta Name That Car!