HEI timing jump

[Shannen Durphey]

Clare Snyder wrote:
> 
> Matt Beaubien wrote:
> >
> > Hi all,
> >
> > There was some discussion a little while ago about how certain HEI modules
> > will suddenly advance the timing when not connected to the ECM. I would like
> > to use a couple of these on a motorcycle engine that has a missing timing
> > box. It has two Hall-effect  pickups and a coil pack. I could just use a
> > standard module but the thing would be hard to start with the proper amount
> > of advance.
> >
> > My question is what module do I need exactly? A couple were mentioned but
> > I'm not sure which I need. Also, how does it get wired?
> >
> > Thanks.
> >
> > Matt Beaubien
> > mbeaubie at gpu.srv.ualberta.ca
> > 3 x 510's
> > 1 x 300ZXT
> > 1 x Civic 1200
> >From what I figured out, will not give you advance with hall sensors as
> they are strictly a switch. The advance appears to be a result of the
> "trigger voltage" being reached more quickly at higher rotational
> speeds.
> Sorry the news is not better.
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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