Re: Audio Tachometer for 2 stroke engine

On Wed, 27 Apr 2005 11:02:33 GMT, "Mook Johnson" <mook@xxxxxxxx>
wrote:

>This is precicely what I'm after and trying to avoid (wires and special
>mounts)
>
>I guy wants to know how fast his hot boat is running and what RPM range its
>operating in, just velcro this puppy on and go for a spin bring it back.
>You will have a log of the run. He can tweek from there if he's losing too
>much RPM in the turns or it's slowing down at the end of the straights.
>

After all this chewing around without reaching some consensus, why not
do some practical experimentation? Stick a mic somewhere close to an
engine, stationary of course, and scope it. My guess is you'll see a
rather well defined waveform from the exhaust with some higher
frequency low level crud superimposed.

- YD.

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