Output of distributer's magnetic pickup

[Paul E. Bueltmann III]

Bruce Plecan wrote:
> 
> ----Original Message-----
> From: Raymond C Drouillard <cosmic.ray at juno.com>
> To: fsj at digest.net <fsj at digest.net>; fsj-list at unix.off-road.com
> <fsj-list at unix.off-road.com>; diy_efi at efi332.eng.ohio-state.edu
> <diy_efi at efi332.eng.ohio-state.edu>
> Date: Saturday, April 11, 1998 1:16 AM
> Subject: Output of distributer's magnetic pickup
> 
> >I have a Motorcraft Duraspark ignition in my '89 Grand Wagoneer.  I am
> >trying to use a seven-pin GM ignition module so that I can control the
> >spark timing with the Holley Pro-Jection 4Di box.  I want to trigger the
> >GM module with the pickup coil output of the Motorcraft distributer.
> >
> >The seven-pin module is the one that is used in the GM HEI (High Energy
> >Ignition) systems - both coil-in-cap and the external coil module.
> >
> >This is rather obscure info, but maybe someone can help me.
> >
> >1) What is the voltage output of the ignition pickup coil that is used
> >for the Motorcraft Duraspark?
> >
> >2) What voltage is required to trigger the GM module?
> >
> >Do you know of anyone who has used a Motorcraft distributer to trigger a
> >GM module?
> >
> >Ray Drouillard

I measured the voltage at the pins on a napa echlin tp49 7 pin and
measured 3 volts at low rpm and 5 volts at the high rpm don't know if I
was measuring from the right pins. The pins I used were the b pin and +
pin on the 3 wire side.

later paulb3 at gte.net