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For all those 550i owners who think they've got smthg under the hood...

2286 Views 12 Replies 8 Participants Last post by  TOPVIEW
Now that I've got your attention... and angry grim on your face and flame gun ready to go off.... :D:rofl::D. Enjoy!

DEFINITION OF ACCELERATION

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 (0.15) of a second for all 6,000+ horsepower (some believe 8,000 HP is more realistic - there are no dynomometers capable of measuring) of an NHRA Top Fuel dragster engine to reach the rear wheels.
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 of nitromethane, the flame front temperature measures 7,050 deg F. (Oxy-acetylene on "cut" is 6,300)
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 one 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 instant.
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!

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When I was at the track last weekend, they held a Gambler's Race, or basically a handicap race. A Top Fuel dragster went against a regular car (I think a Charger) which had a 9 second headstart. The Dragster won! IIRC it ran a 4.94.

On the otherhand, the Charger won the round trip race hands down. The Charger drove itself back to run again, but the dragster needed a tow truck to bring it back. :rofl:

BTW, the math in the article is incorrect, since the Corvette will transverse the quarter mile in 4.5 seconds and unless the dragster is repeating his world record run (not after sitting for 30 secs) the Corvette wins. The dragster may reach 200mph in 3 seconds, but it is still well behind the Corvette at that point.
That vette vs dragster scenario would have been a blast to watch. I so wish they could arrange to actually do this.
Yeah, sure.

But how's the gas mileage, the room in the trunk, rear seat leg room, the stereo system, electrically folding mirrors, etc?

:bigpimp::thumbup:
And it will do just fine with some snow tires ...
And it's just an rwd...
Thanks for reminding me. :rolleyes:

In my futile quest to reach a 12.4 secsond quarter mile time, I tried folding my mirrors prior to one run. As I accelerated down the track, they unfolded automatically. :mad:
Yeah, sure.

But how's the gas mileage, the room in the trunk, rear seat leg room, the stereo system, electrically folding mirrors, etc?

:bigpimp::thumbup:
I knew I made a right choice :rofl:
And it's just an rwd...
LOL yeah they unfold @ about 25 mph:)
Thanks for reminding me. :rolleyes:

In my futile quest to reach a 12.4 secsond quarter mile time, I tried folding my mirrors prior to one run. As I accelerated down the track, they unfolded automatically. :mad:
Awesome read! Really puts things into perspective.
The only misplaced braggadocio I've seen in this forum recently was from a 535i owner who thought he had something really quick and generally being a douche towards a new 528 owner
For all those 550i owners who think they've got smthg under the hood...
Pick your best fact.

I loved that one, :D:D:D
That almost sounds BS!
A stock Dodge Hemi V8 engine cannot produce enough power to drive the dragster's supercharger.
Man oh Man, the one thing all these posts cant describe is the shear rumble these beasts generate. The fact you can literally stand 10 feet away from them when the warm them up in the pits and then you get some drivers that rap the throttle in the pits and it is a blast to watch first timers jump out of thier shoes

Even in the stands, when 16,000 horsepower whip by you, it is unbeleivablely loud and violet

Have not been to a race for a couple of years, but going to head to Chicago next summer, one of the best tracks for races
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