Polaradude

* One dragster's 500-inch Hemi makes more horsepower then the first 8 rows at Daytona.

* Under full throttle, a dragster engine consumes 1 1/2 gallons of nitro per second, the same rate of fuel consumption as a fully loaded 747 but with 4 times the energy volume.

* The supercharger takes more power to drive than a stock hemi makes.

* Even with nearly 3000 CFM of air being rammed in by the supercharger on overdrive, the fuel mixture is compressed into nearly-solid form before ignition. Cylinders run on the verge of hydraulic lock.

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

* At stoichiometric (exact) 1.7:1 air/fuel mixture (for nitro), the flame front of nitromethane 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.

* 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 off its fuel flow.

* If spark momentarily fails early in the run, unburned nitro builds up in those cylinders and then explodes with a force that can blow cylinder heads off the block in pieces or blow the block in half.

* Dragsters twist the crank (torsionally) so far (20 degrees in the big end of the track) that sometimes cam lobes are ground offset from front to rear to re-phase the valve timing somewhere closer to synchronization with the pistons.

* To exceed 300mph in 4.5 seconds dragsters must accelerate at an average of over 4G's. But in reaching 200 mph well before 1/2 track, launch acceleration is closer to 8G's.

* If all the equipment is paid off, the crew worked for free, and for once NOTHING BLOWS UP, each run costs $1000.00 per second.

* Dragsters reach over 300 miles per hour before you have read this sentence.

Did you know …

… that the nitromethane-powered engines of NHRA Top Fuel dragsters and Funny Cars produce approximately 7,000 horsepower, about 37 times that of the average street car?

… that one cylinder of the eight cylinders of a Top Fuel dragster or a Funny Car produces 750 horsepower, equaling the entire horsepower output of a NASCAR engine?

… that the gasoline-powered engines of NHRA Pro Stock cars produce about 1,200 horsepower, about eight times that of the average street car?

… that an NHRA Top Fuel dragster accelerates from 0 to 100 mph in less than .8-second, almost 11 seconds quicker than it takes a production Porsche 911 Turbo to reach the same speed?

… that an NHRA Top Fuel dragster leaves the starting line with a force nearly five times that of gravity, the same force of the space shuttle when it leaves the launching pad at Cape Canaveral?

… that an NHRA Funny Car is slowed by a reverse force more than seven times that of gravity when both parachutes deploy simultaneously?

… that NHRA Top Fuel dragsters and Funny Cars consume between four and five gallons of fuel during a quarter-mile run, which is equivalent to between 16 and 20 gallons per mile?

… that NHRA Top Fuel dragsters and Funny Cars use between 10 and 12 gallons of fuel for a complete pass, including the burnout, backup to the starting line, and quarter-mile run?

… that NHRA Top Fuel dragsters and Funny Cars travel the length of more than four football fields in less than five seconds?

… that NHRA Top Fuel dragsters can exceed 280 mph in just 660 feet?

… that from a standing start, NHRA Top Fuel dragsters accelerate faster than a jumbo jet, a fighter jet, and a Formula One race car?

… that a fuel pump for an NHRA Top Fuel dragster and Funny Car delivers 65 gallons of fuel per minute, equivalent to eight bathroom showers running at the same time?

… that the fuel-line pressure for NHRA Top Fuel dragsters and Funny Cars is between 400 and 500 pounds, about 20 times greater than the pressure on passenger-car fuel pumps?

… that depending on size and angle, the large rear wing on an NHRA Top Fuel dragster develops between 4,000 and 8,000 pounds of downforce?

… that the 17-inch rear tires used on NHRA Top Fuel dragsters and Funny Cars wear out after four to six runs, or about two miles? Some brands of passenger-car tires are guaranteed for 80,000 miles.

… that it takes just 15/100ths of a second for all 7,000 horsepower of an NHRA Top Fuel dragster engine to reach the rear wheels?

… that it's desirable for an NHRA Top Fuel dragster to race with its front wheels inches off the ground for about the first 200 feet of the run? This ensures proper weight transfer to the rear wheels, a crucial part of a good launch and quick run.

… that the nitromethane used to power the engines of NHRA Top Fuel dragsters and Funny Cars costs about $30 per gallon?


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67 GTX

WOW to everything, but especially this
the engine diesel's, and still picks up speed?

78D200

When I was a junior in highschool, there was a picture of a top fuel dragster in my physics book. I told the teacher that the motors in those car make ~7,000 HP. He looked at me and laughed and said there was no way. I told him to look it up and see for himself. The next day I asked him if he looked it up and he said he wasn't going to waste his time. So I placed a printout I found online about dragsters (much like this) infront of him. His eyes got big and mouth dropped.

Polaradude

I thought the Forum might like this, it's cool eh ?

78D200

Look out world, I'm getting smarter.


(why can I see this comment coming back to bit me in the @$$)

Polaradude

It's a sad day Tim when you don't learn something new buddy.

67 GTX

lol
by tomorrow, Tim's gonna be like, "did i really say that?"

Polaradude

lol, he won't remember...

67 GTX

lol
probably not

67 GTX

how does the engine still pick up speed after it diesel's?

Polaradude

well a diesel engine works on compression right ? No spark plugs right. It's the same with the nitro hemi, after the plugs toast off there is enough heat and compression to keep the combustion cycle going. Clear as mud ?

67 GTX

haha
well, i get it
it just amazes me

BuckNeccid

The most powerful Locomotive engine in use now (16 cylinder deisel) only produces 6,000 hp.

67 GTX

haha
"only"

MReeves

I wonder how I could get one of them in my Barracuda???? A door car running Top Fuel??? HUMMMMMM..........

67 GTX

dont get to many crazy ideas now
lol

Polaradude

Just a bump so the new folks could have a read.

SCAMP TRAMP

That was awesome, Thank you Polaradude for putting that info up

1OldFordMan

Very interesting info. Well worth the read.

78D200

How much torque is that thing pumping out though? I'd be willing to bet close to if not over 5 digits.

SCAMP TRAMP

Ya that would an interesting number to see, on low sulpher fuel 10 to 12 thousand ft/lb @ 1600 prm would be realistic I think ..... just looked at this Russian gas turbine on line 11,000 HP and a 17 ton fuel tank to feed the beast .....wonder if it comes in a Hemi head version lol

78D200

I miss the drag trucks....

SCAMP TRAMP

Your not alone there ....

Buffalojoe426

This is mind blowing! Now I know why drag racing appeals to me more than nascar.

RROriginals

I have a friend that runs a 'Cuda on Jet fuel, costs him $15/Gal

SCAMP TRAMP

lol I'm with ya there .... how about not only the first HEMI Chrysler built but the biggest

XIV-2220
Liquid cooled Supercharged inverted V16
5.8" Bore
5.25" Stroke
2219.35 ci / 36L
SOHC
2500 Horsepower @ 3400 rpm
2440 dry weight

Orignally made for P-47 Thunderbolts in WWII but war ended before they went into production, 3 known to exsist with 1 being in the Chrysler musume
Motor had to be inverted so the pilot could see over the cowl and prop placement

SCAMP TRAMP

up to $28 a gallon some places here ...

RROriginals

Ouch $28/Gal? The guy I know drives it with JF daily, think of how much that costs him a week?

SCAMP TRAMP

lol nothing like working all week to feed the car, sounds familiar

RROriginals

Lol, it's insane though, I mean C'MON Jet Fuel for a week?!