DEFINITION OF ACCELERATION

Discussion in 'General Conversation' started by Phil Washburn, Oct 28, 2009.

  1. Phil Washburn

    Phil Washburn New Member

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    for you gearheads:smile2:


    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 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
    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 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 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 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 friends, is ACCELERATION!
    Now don't you feel better just knowing that little bit of info?
     
  2. JEFFRODAMIS

    JEFFRODAMIS New Member

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    i could beat it on a road course in a pinto :smile2:
     

  3. JEFFRODAMIS

    JEFFRODAMIS New Member

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    they are impressive to say the least

    as is lingenfelter..i had a intake ported by his shop for an lt1 i never finsihed
     
  4. oh no

    oh no New Member

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    Hey top fuel is great,,, I seen them chest thumpers at US 131 a couple months ago,,,,,
     
  5. roadkill636

    roadkill636 New Member

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    I belive drag BOATS reach a bit faster speeds than this,,, in the 1/4
     
  6. Phil Washburn

    Phil Washburn New Member

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    could be, Jeremy, but they do it from a ROLLING start - makes a difference:wink:
     
  7. postbeetle

    postbeetle New Member

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    Sure beats my 94 GMC 1/2 ton Phil. Don't think the dogs that usually ride with me could catch that sucker and whiz on its tires.
     
  8. corklabus

    corklabus New Member

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    359
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    Even after all this "eloquence" you've neglected to point out that because of all this explosive speed, the "drag race", even though still "called" the quarter mile, has been shortened to a mere 1,000 feet. Leaving the remaining 320 feet to assist in getting these rockets stopped safely without adding extra cost and realestate to the tracks they run.
    Had this NOT been done, just how fast would these things really Go ?
     
  9. Phil Washburn

    Phil Washburn New Member

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    cecil, the only measurements for drags i am familiar with are 1/4 mile, 1/8 mile, and my local street years ago...care to link me to your assertion that drags have been shortened 320 feet?
     
  10. corklabus

    corklabus New Member

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    359
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    This was done a couple of years back. NHRA promoted and supported it. All sanctioned drags now, to my knoledge, are only 1,000 feet. Especially in fuel classes. I've also noticed that you don't hear much about it anymore. I thought it was accepted across the board by Pro racers and fans alike. I admit I don't follow the sport as closely as I did when I was involved, but I ain't THAT far gone.
    As for Street and other off track stuff, I'm as dumb as the folks doin' it.
     
  11. oh no

    oh no New Member

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    11,108
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    As it is they are half way cheating,,, the track is sprayed with this sticky junk,,,,,,walk across one and your shoes will stick,,,lol

    But Top Fuel is something everyone needs to see in person,,, you need to feel the pounding in your chest,,, you need to use your fingers and ear plugs to try and drown out the noise,,,,,It is Awsome when they take off.
     
  12. Phil Washburn

    Phil Washburn New Member

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    yep - they are the real ground-pounders Jim:big_smile:
     
  13. Phil Washburn

    Phil Washburn New Member

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    look again, Cecil - these are high dollar events. the measured 1/4 is sacred. if i am wrong, i will apologize. however, all sanctioned events i have seen, been to, and heard about were true 1/4 mile.

    let me ask you once again to link me to sanctioned events that are not 1/8 or 1/4 mile tracks.
     
  14. Phil Washburn

    Phil Washburn New Member

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    hey, Jim, wasn't it garlits years ago that put dual wheels on the back of his top fuel car? went out and literally ripped the asphalt up - the track had to cancel the event:eek:oooh:
     
  15. Snagged2

    Snagged2 New Member

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    Haven't watched too many "Car" drags,, but, the AHDRA sure puts on a good show!!!

    Love,,NITRO!!!

    In Vegas, because of weather,, they shortened the sanctioned track of 1/4 mile to 1/8 because of wind.. for safety..
     
  16. corklabus

    corklabus New Member

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    I can't really provide any links in the subject. I just saw it all on tv watching funny car finals before John Force had that terrible wreck. Another point on links.....I'm so dang computer dumb, I probably couldn't make one if I tried. I''m sure a few Googles will point ya in the right direction.
    I can't say much about 1/8 mile stuff either. I'd rather watch Monster trucks or sloppy mud bogs.
     
  17. Phoneman53

    Phoneman53 New Member

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  18. Phil Washburn

    Phil Washburn New Member

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    thanks, Bill. that article states that it is an interim step, not permanent yet. and it was more than a year ago. it only affects top fuel and funny. i am trying to find out if they made it a permanent step, and if affects all sanctioned events/tracks.

    it is news to me - i wasn't aware of it
     
  19. Slatebar

    Slatebar New Member

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    I never cared for car races, but man I found that to be some really interesting facts and reading. That sure would be one fun ride:big_smile:
     
  20. restorerancientiron

    restorerancientiron New Member

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    Top fuel and funny cars have raced at 1000 feet instead of the 1320 all of the 2009 season to date.This was implemented mostly due to death of Scott Kalitta.Scott made it down the 1/4 mile but could not stop in time to avoid crashing into the barrier at the end of the track.The resulting crash and flipping of his car was said to what proved to be fatal.They did not want to make all sanctioned events change so they decided to shorten the track as a cheap but effective safety measure.They also put the sand traps at the end to gradually slow the car down.To my knowledge they will be keeping it this way from now on in the mentioned two classes.These two were the only classes that would not stop in time at all tracks in case of another parachute failure either mechanical or as a result of a driver being unconscious.