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 of a second for all 6,000+ horsepower of an NHRA Top
Fuel dragster engine to reach the rear wheels.
Under full
throttle, a dragster engine consumes 1-1/2 gallons of nitro methane per
second. A fully loaded 747 consumes jet fuel at the same rate but 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 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 heat of the 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 deg F. The engine can only be shut down by cutting the fuel
flow.
If spark
momentarily fails early in the run, unburned nitro immediately builds
up in the affected cylinder 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 one 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 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!!