Driving an HEI Module with other signals

[mike mager]

The (however many wire it is?) HEI module was designed from conception to be 
operated by a logic signal!, so doing so means just that - connect a logic 
signal! - 'Turn on' the bypass mode, and just feed the logic input;  the VR 
input is needed/used only for starting/limp-home on those old things.

Without the VR _input_, you lose the _reference _output_.

The truth about about advance in the module when using the VR input only is 
a lot different than what I have seen in any of the books (they all say 'no 
advance');  the module provides a step advance above some RPM 2,500, or so 
(this means don't forget to plug in the distributor cable!

Mike


>From: Brent Obermiller <ober_b at sssnet.com>
>Reply-To: gmecm at diy-efi.org
>To: gmecm at diy-efi.org
>Subject: Re: Driving an HEI Module with other signals
>Date: Thu, 23 Mar 2000 09:41:10 -0500
>
>This may be more of a question than comment:  I thought I
>read somewhere that the electrical caused by the reluctor
>shifts phase at different rpm (or rate of cutting flux
>according to Maxwellian Theory).  Additionally,  it went on
>to say that the GM module compensated for that.  The point
>being (if this true) is that the point wouldn't shift and
>the module would introduce a skew to the timing curve.
>-Brent
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