[Gmecm] HEI module

[David Allen]

  Yes, I get it.  I was thinking of making a box using a PIC that would
buffer a points-type ignition signal and provide a clean 5V logic level
reference pulse.  This box could filter the signal by debouncing, and
filling in missing pulses, and limiting cylinder-by-cylinder timing
variation. Something I'll probably never do but it is interesting to think
about.
  Just an idea.  An electronic pickup is by far better in all respects.
Someone showed me an engine with a distributor so strange nobody makes an
electronic pickup for it. It was an old Ford Flathead with a front
distributor. It would probably be easier to fabricate a crank trigger setup
with a VR sensor and use the Flathead dist for cap/ rotor function only.
Easier than making such a program to do the above.
    Thanks,
David

----- Original Message ----- 
From: "WopOnTour" <wopontour at hotmail.com>
To: <gmecm at diy-efi.org>
Sent: Sunday, November 27, 2005 4:30 PM
Subject: Re: [Gmecm] HEI module


> David
> You may be able to accomplish what you are saying, however you will still
> need to use SOME form if signal generator referenced/synchronized to
> crankshaft position (aka IGN REFERENCE), in order to create the raw signal
> source that produces/influences the EST output signal. So you would
> certainly need to create a digital reference signal with either
conditioned
> VR or hall-effect devices that were triggered appropriately at your
desired
> firing frequency.
> So in short, NO IGN REF= NO EST
> JMO
> WOT
>
> ----- Original Message ----- 
> From: "David Allen" <davida1 at hiwaay.net>
> To: "GM-ECM" <gmecm at diy-efi.org>
> Sent: Sunday, November 27, 2005 6:24 PM
> Subject: [Gmecm] HEI module
>
>
> >  Guys, has anyone expirimented with firing an HEI ignition module using
> > only the EST and Bypass connections? In other words, pull "bypass" high,
> > and
> > pulse the "EST" line to create a firing event without any pickup coil
> > connected to the module?  I may do a bench test to see if this is
> > possible.
> > Just curious if this has been tried before?
> >  (I'm talking of the computer HEI units with the coil& battery plug,
GBRE
> > plug, and PN connector for pickup coil.)
> > Later,
> > David
> >
> >
> > _______________________________________________
> > Gmecm mailing list
> > Gmecm at diy-efi.org
> > http://lists.diy-efi.org/mailman/listinfo/gmecm
> >
> _______________________________________________
> Gmecm mailing list
> Gmecm at diy-efi.org
> http://lists.diy-efi.org/mailman/listinfo/gmecm
>