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Fun with Engine Management Systems
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Posted by: Daniniowa
Copied from a forwarded email:
Load the link and press play.
http://astro.temple.edu/~kmr/Chauffe2.mp3
First you'll hear a 10-cylinder, 750 horsepower Asiatech F1
engine being warmed up. Then it performs a rousing version
of "When The Saints Come Marching In", to the delight of
assembled pit staff and journalists.
Here's how the magic was achieved (technical/musical details
via F1 Racing magazine):
As we all know, a V10 engine produces five combustions per
revolution at a frequency per second of 60/(5 x revs per
minute), which equals 12/rpm. Therefore, to work out the
revs you need to hit a particular musical note, you multiply
the note's frequency by 12. To play a 440Hz 'A', for example,
you need 5,280rpm. For 'C', use 3,139rpm, for 'F' 4,191rpm,
and so on.
Asiatech's French technicians (the engine, despite its name,
is derived from a Peugeot design) simply programmed their
engine to run through the various rev/note ranges in the
correct sequence. The result is delightful. And think of the
possibilities - BMW's F1 engine, which howls all the way to
19,050rpm, could rip through the entire Hendrix songbook.
Even better: imagine a massed NASCAR choir performing "The
Star Spangled Banner"! Being eight-cylinder engines, the
frequency per second would be 60/(4 x revs), which means
you'd multiply the note frequencies by 15 instead of 12: 'A'
would arrive at 6,600rpm, 'C' at 3,923rpm, 'F' at 5,238rpm,
etc.
Mark my words, someone will be getting rich at Daytona next
year selling a CD of NASCAR patriotic anthems.
Posted by: marcusgunby
that is great.
Posted by: grass-digger
that was the most beautiful peice of music i have ever heard
Posted by: luvtolean
That was great!
Posted by: atc3434`
Amazing! That was so cool. I need to program the computer on my car to do that! Too bad I'm only good for 5500 rpm... won't be able to sing much. 
Posted by: Fark
Simply stunning. What kind of car ATC? I have a 99 hugger orange Z28 procharge'd. Still need to get a dyno/PCM tune however.
Posted by: atc3434`
Haha.... just my good ol 15 second Buick Century. 
3.3 liters of pushrod GM power. Seriously though, I've gotten a few times on the quater under 16 seconds, a best of 15.6 @ 85mph. Probably could do a lot better if I had more than three gears in the tranny. Good ol 89 Buick gets it done though... hands it to the import kids all night! Next month, its getting passed on to a sister that needs wheels, and I'll step it up to a late 80's Camaro. Can't wait for that.
Posted by: Fark
Not gonna reply, don't want to get the threads deleted. Word up man. Bracket race that sombitch! Keep on keepin on... life's a garden... dig it
Posted by: Roost165
Please i've belted out beethoven on my RM!!! LOL i wish.
Posted by: bclapham
came accross this the otherday
http://www2.us.porsche.com/english/usa/home.htm
Posted by: marcusgunby
bruce what am i looking for on the website?
Posted by: bclapham
whoops, look under entertainment and go to sounds!
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