Re: Driving an HEI Module with other signals

["mike mager" <mikemager@hotmail.com>]

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@sssnet.com>
> Reply-To: gmecm@diy-efi.org
> To: gmecm@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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