HEI timing jump

[Bruce Plecan]

From: Clare Snyder <snyder at huron.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
dzorde wrote:
>> Use a signal amp with voltage controlled gain, a F-V converted will give
you
>> the increasing voltage as your rpm's increase, which in turn will bump
the
>> gain on your amp.  A neat little all hardware method.
>> Dan     dzorde at geocities.com
>> >Would it be possible to build a signal amplifier for hall
>> >effect switches that will increase module trigger voltage as
>> >rpm increases?  Seems like this is what you need.
>> >Shannen
>Still won't work. It is not the absolute voltage that mnatters. Digital
>at ANY voltage will not produce the advance. It is the RATE OF RIZE of
>the voltage that is critical. The ignitor triggers at a particular
>voltage. This voltage is reached ealier or later depending onspeed due
>to the distictive qualities of an inductive pickup. Don't matter what
>you do to a switch, and a HALL device is just a switch, you will not
>duplicate the "built in advance" of a magnetic pickup with a hall on an
>HEI module. Forget trying - it will not happen.
>         Alls well that ends well!! www.snyder.on.ca is back
>                  E-Mail service is back to normal
                   Reply to Clare at snyder.on.ca

How about flipping from a rising to a falling signal trigger, no ramping
just all or nothing.
Bruce