Factory Instrument Panels

[Bruce Plecan]

-----Original Message-----
From: Scott Feaver <sfeaver at cgocable.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Tuesday, January 12, 1999 9:00 PM
Subject: Factory Instrument Panels


>Has anyone ever used a GM gage package in anything that they have adapted
to
>EFI?

I'm not an EE, but it is an air-core meter using a National Semiconductor
driver, 1949 comes to mind.  If you can't find
it it has been mentioned in the archives.
Bruce
>
>The reason I am asking is I need to adapt a tachometer module from a 90
>Turbo Sunbird to a 91 Sunbird.  The difference is the 90 is a four cylinder
>car, and the 91 is a 3.1V6.  The tach is reading about 50% higher in the V6
>(which makes sense because for every 2 pulses it expects to see, it
receives
>three).
>
>If there is no simple solution, does anyone have a circuit that will delete
>every third pulse from the spark module?  I don't know what voltage the
>signal is, but it is a 3.1V6 with the distributorless 3-coil module.  Since
>there fairly common, i'm hoping someone knows ;)
>
>Thanks,
>Scott
>