does anyone have the old link to the do it yourself tach calibration that was sticky posted here? i need to know the frequency and if it was a square wave....
Ron
Full Version: tach calibration
Ron I don't have the link but I do tach calibrating. I am in Coon Rapids MN. $15.00 plus shipping. Same day turn around. Riley
I'd do that. It isn't worth the headache of doing it yourself. $15 $ well spent. 
Had mine done by Goodwin for $20. Mine was pretty much on the mark at peak RPM, from 7000 - 7800 rpm it was either dead on or off by 50.
That old post required sound files at the correct frequency to operate the tach. A polaris 6 pulse tach requires 800 Hz to reproduce an 8000rpm reading.
The way I do it is to attach a frequency meter (cheap Craftsman Voltmeter) to the lighting circuit and check the frequency while running the engine at various RPMs and reference it to the tach reading. Take your frequency reading and divide it by 6 and then multiply it by 60 and thats the rpm. (Hz/6)*60=Engine RPM This is for 6 pulse Tachs. If you have anything else, divide by 2 or 4 instead of 6.
The way I do it is to attach a frequency meter (cheap Craftsman Voltmeter) to the lighting circuit and check the frequency while running the engine at various RPMs and reference it to the tach reading. Take your frequency reading and divide it by 6 and then multiply it by 60 and thats the rpm. (Hz/6)*60=Engine RPM This is for 6 pulse Tachs. If you have anything else, divide by 2 or 4 instead of 6.
QUOTE(PolarisNut @ Aug 25 2004, 01:39 PM)
That old post required sound files at the correct frequency to operate the tach. A polaris 6 pulse tach requires 800 Hz to reproduce an 8000rpm reading.
The way I do it is to attach a frequency meter (cheap Craftsman Voltmeter) to the lighting circuit and check the frequency while running the engine at various RPMs and reference it to the tach reading. Take your frequency reading and divide it by 6 and then multiply it by 60 and thats the rpm. (Hz/6)*60=Engine RPM This is for 6 pulse Tachs. If you have anything else, divide by 2 or 4 instead of 6.
The way I do it is to attach a frequency meter (cheap Craftsman Voltmeter) to the lighting circuit and check the frequency while running the engine at various RPMs and reference it to the tach reading. Take your frequency reading and divide it by 6 and then multiply it by 60 and thats the rpm. (Hz/6)*60=Engine RPM This is for 6 pulse Tachs. If you have anything else, divide by 2 or 4 instead of 6.
Thank you
Ron
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