"Califbill" wrote in message
...

iBoaterer wrote:
In article , says...

On 9/10/2013 5:56 PM, Mr. Luddite wrote:
Since boats have engines and for a change of pace, I thought I'd
share
some info I recently received from a car nut. He's talking about
a
custom built, 500 cubic inch dragster engine based on the Chrysler
426
c.i. hemi design.

Here's a short list of it's specs and acceleration capabilities:

Produces 8,000 horsepower. That's more than the first 4 rows of
cars
at NASCAR's Daytona 500.
Consumes 11.2 gallons of nitro methane per second at full
throttle.
Dual magnetos supply 44 amps to each spark plug.
Capable of reaching over 300 MPH +... before you have completed
reading
this sentence.
Redlines at 9,500 RPM ...


only does 540 revolutions light to light in the quarter mile.

I want to quibble with the 540 engine revolutions for 1/4 mile.
But, the numbers tell the story.

Average drag tire is 30" tall, for a circumference of 94" or
7'10".
1/4 mile is 1320ft. 1320 ft / 7'10" equals 168.5 wheel rev's down
the
track. Assuming a final ratio of 3 to 1 (motor to wheel)
3 times 168.5 = 505 revolutions per 1/4 mile. (does not include
wheel
spin. Damn!
Mikek
Fun Fact.
When I was kid my grandmother lived 7 miles from Martin Dragway,
On Saturday nights we could hear the dragsters run the 1/4 mile
from her
house 7 miles away.

Yeah, 540 revs is not correct.

More like 633 revs. For 4 seconds at 9500 rpm. Not including
startup,
burnout, and shutdown. Also takes the power of one cylinder to run the
supercharger, and is near hydro lock with the amount of air and fuel.

---------------------------

633 revs assumes it's red lined at 9500 rpm throughout the entire
quarter mile. I don't think that's so.
The 540 revs given in the article was an approximate figure because it
doesn't take into account variables like wheel spin, etc.

Mikek's calculations seem spot on for a theoretical perfect run, light
to light with no wheel spin and not accounting for burnouts done
beforehand.
The article stated that Including the burnout, the engine must only
survive 900 revolutions under load. It's then rebuilt.

Other specs sent about this:

0 to 100 MPH in .8 seconds (the first 60 feet of t he run)
0 to 200 MPH in 2.2 seconds (the first 350 feet of the run)
6 g-forces at the starting line