Some VSS info&questions

[Gary Derian]

If you are doing a Camaro - P245/50R16 tires that rotate 811 times per mile.
With a 40 pulse per driveshaft rev sensor and a 3.42 axle ratio, the output
is 110,944.8 pulses per mile.  Aren't there simple counter chips that can
divide by 55 to get 2018 pulses per mile?  (you can tell I'm an ME).   If
you have different tires or axle ratio, put in your own data.  Tire revs per
mile is 20,800/dia(in).
Gary Derian <gderian at cybergate.net>

-----Original Message-----
From: Andris Skulte <askulte at emerald.tufts.edu>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Wednesday, March 04, 1998 1:57 AM
Subject: Re: Some VSS info&questions

>You got it exactly right. I'm getting rid of my mechanical T5 and going
>to the electrical T56. I solved the speedo drive by using an electrical
>firebird speedo and VSS buffer box. I still need to convert the 40 p/rev
>to 2000 rev/mile. Someone mentioned using a frequency counter chip,
>changing it to voltage (another chip), adding an adj resistor to change
>(calibrate) voltage, and finally convert it down to frequency (third
>chip). I think I got it right... What parts do I buy (i.e. numbers) TIA!
>:)
>
>Andris