OT: Acceleration, and you thought GT2's were fast!

[A Quiet Boom]

A Definition of Acceleration.

* One Top Fuel dragster 500 cubic inch (8.1 liter) Hemi engine makes more horsepower than the first 4 rows of NASCARS at the Daytona 500.

* Under full throttle, a dragster engine consumes 1-1/2 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'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 for nitro methane, the flame front temperature measures 7,050 deg F.

* 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 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 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 estimated $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).

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Putting all of this into perspective:
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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 1,320 foot long race course.

... and that my friend, is ACCELERATION!

[bigrubberjeep]

Blah! Just buy a patriot missle and duck tape it to your roof. Then light the flent.

I'll smoke that dragster!

[Larry Harris]

Gotta be careful with those nasty flents.

[Jgordon]

What if you put an ERam on the dragster?

[porscheboy16]

repost

[Jack Olsen]

Here, and -

Here, and -

Here.

[A Quiet Boom]

Originally posted by JackOlsen
Here, and -

Here, and -

Here.

Sorry!

I've been a fan of drag racing for years and never saw all these facts before tonight when my brother sent them via email. I didn't think to do a search since I figured most of you guys were the road racing types and wouldn't have seen this info before. I'll search next time.

I meant to add in my original post that all TF dragsters run MFI (911 content) due to NHRA regulations trying to keep the speeds down to a reasonable (relative term) level. They also run dry sump oiling like a 911 in an effort to keep the oil/nitro slush from exploding in the crankcase.

[alf]

I have a box of 5.56 ammo that will out accelerate that dragster. Too bad the bullets, like the dragster, could not take corners like my 911

alf

[Fidalgo911S]

Great article. I think the acceleration is about the same as a catapult shot off an Aircraft Carrier. The Navy jets go from zero to 150-170 Knots in about 1.5 seconds. The top speed is something quite substantially more.

[Bothari]

talking about acceleration, you guys ever seen the video with that veilside gtr going 0-300 km/h in 13.7 seconds? the guy even missed a shift...
linky

[911ctS]

wheeew....and i thought you knew all that stuff off the top of your head. Made me feel kinda dumb for a sec.

[lparker]

Credit where credit is due:

http://www.automobilemag.com/columns/0403_americandriver/