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Discussion Starter #1
I got this email this morning and had to share it!

* 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 11/2 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 ½ 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 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 9500rpm.

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

The current Top Fuel dragster elapsed time record is 4.441 seconds for the quarter mile (10/05/03, Tony Schumacher). The top speed record is 333.00 mph. (533 km/h) as measured over the last 66' of the run (09/28/03 Doug Kalitta).

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.

That folks… is acceleration.
 

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and this is why you will find me at at least one NHRA national level event each year.

you can not put into words how these things run. I find it amazing that they share the same basic engine architecture as Pa Kettle's 'ol pickup truck.

If you are a gearhead of any type, you will not be disappointed by a top fuel race. [:D][:D][:D][:D][:D][:D][:D]

bring earplugs. and ear defenders to wear over the earplugs. [8D]

cheers
Pneuman
 

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Awesome

"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."

This just boggles the mind.
 

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Nice, I've seen them run but never thought of the 200 mph running start comparison, thats just plain awesome. A friend was talking with a mechanic for a top fuel team and he asked how long it takes to get the motor up to max rpm and the answer was 2 holes. 0-9000 rpm in 2 holes of a V-8.
 

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Thats cool..
 

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

Do you suppose this would solve our problem with fouled plugs on our swowmobiles??? LMAO!

That's an incredible mechanical acheivement. Everything about it.
I couldn't imagine getting an average 4 G's of acceleration out of a pair of rubber tires!
 

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I'd like to see some of the old pictures of that Rupp snowmobile with the V8 with the blower that broke the world speed record for a snowmobile
 

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Discussion Starter #10
Originally posted by hooha311
[br]I'd like to see some of the old pictures of that Rupp snowmobile with the V8 with the blower that broke the world speed record for a snowmobile
That would be cool! What speed did they record?
 

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that is some sweet info
 

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I agree an National NHRA Event needs to be 'seen' in person to get the full effect! THe sound a Top fuel car makes is so load the sound like reverberates inside your chest. Those that have been near the starting line during a race know what I mean.

On a nother note check this site out for your V-8 rupp (page 2 I think) If you think we TODAY are on top of sledding HP, you will be sadly mistaken. Those 'good ol boys'back in the 70's were making some serious HP in a snowmachine.
Heres the link; http://www.vintagesleds.com/restoration/rarebirds/index.htm
I hope it works, check all the pages....
xc5
 

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Originally posted by Flange
* Under full throttle, a dragster engine consumes 11/2 gallons of nitromethane per second; a fully loaded 747 consumes jet fuel at the same rate with 25% less energy being produced.
this is wrong. their full tank is about 15 gallons I believe, and holds just enough for the burnout and the run... It's around 11 gallons burned for the burnout and the run combined...

But yes, i go to BIR for a national event every year, and it is AWESOME!... check my website for pics and a video.
 

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I think that is saying one and one half gallons per second which would give them about enough for 2 second burnout and a 5 second run on 15 gallons.
 

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Discussion Starter #18
Originally posted by hotrod
[br]Ok you lost me on the Rpm line. explain please?
They say the engine turns 9500 rpm or 158 revs per second. The engine is idling most of the time. It's only under load for the 1-2 second burnout and a 4.5 second run...that's not many actual revs when you do the math.
 

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i always knew lots of tech went into that, but never knew they were THAT high performance....
 
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