<all> home dyno kit??

[Roger Heflin]

On Sat, 30 Jan 1999, Mike Pitts wrote:

> >Electromotive and many other systems uses a wheel with many thoths,
> >it could give nice resolution for computing accleration, ...
> 
> Also, if it has enough teeth, you can detect weak cylinders 
> by comparing the waveform in the range of each cylinder. 
> (ie: the teeth will slow ever so slightly for when a weak cylinder 
> if firing)
> 

It is teeth every 6 degrees.  So there are quite a few teeth.  I
thought GM was using a wheel with 4 teeth (every 90 degrees) to catch
misfires, so every 6 degrees would seem to give really accurate info.

I have one of those trigger wheels.  Any ideal where I can get a crank
sensor and what I would have to do to it to make this work?   Run it
into an op-amp and amp the signal and then do something with it?  At
6000 rpm thought, those signals will be running at 3khz so an audio
recorder may be a problem, and a more exoitic signal recorder or
circuit may be required.

				Roger