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U4euh


Posted on Tuesday, February 08, 2005 - 03:27 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Emailed to me from another board, kinda interesting.

One Top Fuel dragster 500 cubic inch Hemi engine makes more horsepower
than the first 4 rows
at the Daytona 500.
Under full throttle, a dragster engine consumes 11.2 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 supercharger. With 3000 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 1.7:1 air/fuel mixture for nitromethane the flame front
temperature 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.
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.
Under 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 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 9500rpm.
The Bottom Line; Assuming all the equipment is paid off, the crew worked
for free, and for once, NOTHING BLOWS UP, each run costs an estimated US
$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).
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 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 1320 foot long race course.
Now that is acceleration!

HBJ

emailed to me from another board.
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Johnnylunchbox
Posted on Tuesday, February 08, 2005 - 10:31 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Good read
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Jlnance


Posted on Tuesday, February 08, 2005 - 11:41 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

So do you just throw the dragsters engine away after a run? I can't imagine that it lasts very long.
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X1tx


Posted on Tuesday, February 08, 2005 - 12:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

They typically do a rebuild between runs. Replace the burned pistons, etc. Buddy of mine worked on a funny car at the Houston round a while back. They gave him a used con-rod. That thing is BEEFY. I've also heard that the NHRA limits the final drive ratios they can use in TF. If they could use anything they wanted those cars would dip into the 3's. Of course, that would eliminate 3/4 of the tracks on the schedule because they wouldn't have nearly enough runoff.
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Cataract2
Posted on Tuesday, February 08, 2005 - 03:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Looks at Buell. hmmm......
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Davegess
Posted on Tuesday, February 08, 2005 - 04:08 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

That is quite fun, the ending is very similar to something Ken Purdy wrote in the 50's about the 1939 GP Mercedes.
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Drfuyutsuki
Posted on Tuesday, February 08, 2005 - 04:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Cataract... I know what your thinking and personally I dont want something like that, that close to my .... um yeah.... buell. What were you thinking? Good read and more useless information crammed into my cranium
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Cataract2
Posted on Tuesday, February 08, 2005 - 10:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Ohhh come on Drfuyutsuki. Think about how you'll explain how you died at the gates of heaven. Be a good one I bet.
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Gschuette


Posted on Wednesday, February 09, 2005 - 01:07 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Motor Trend had a similiar article a while back. It is amazing how violent and powerful those engines are.
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Blake
Posted on Wednesday, February 09, 2005 - 10:39 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Cool.
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Scrap
Posted on Thursday, February 10, 2005 - 05:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Bitchin, can I drive one?
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Hanses25


Posted on Thursday, February 10, 2005 - 09:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Sweeeeeet!!!!!!!!
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Wyckedflesh


Posted on Thursday, February 10, 2005 - 10:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Try standing less then 5 feet from one when they let it rip...even at a half throttle warm up blast in the pit, the exhaust blast will feel like someone just punched you with a full body fist...
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Ftd


Posted on Friday, February 11, 2005 - 07:40 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check them out on ESPN2 this weekend. First NHRA race of the season from Pomona. Qualifying is on late Sat. night and finals Sunday 7-10 (EST).

FYI
Frank
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Ceejay
Posted on Friday, February 11, 2005 - 10:54 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

even watching those guys on TV is a rush, put it through your reciever turn it up and drink a beer, if you can't be there of course. My son-not quite a year old, will come running-as much as he can run anyway, from wherever he is in the house just to get a better view/listen. good entertainment.
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