Dwell Control

[Shannen Durphey]

I don't think attachments make it to the list.  Try sending it direct.
Shannen

Ward wrote:
> 
> On Sun, 11 Apr 1999 21:00:08 -0400, Shannen Durphey wrote:
> 
> The differance is in the phasing of the output DRP
> It was about 45 deg if I rember correctly.
> 
> Why, who knows,
> 
> See atachment.
> 
> Ward
> 
> > Ward wrote:
> > >
> > > On Sun, 11 Apr 1999 09:47:13 -0400, Bruce Plecan wrote:
> > > Good question, I can only guess that they also have a problem during
> start
> > > up.
> > >
> > > If you look close, you will see taht the module (early ver's) have two
> > > functions:
> > >
> > > 1) Convert an analog disrtibuter signal to a rectangular 0/5 VDC pulse.
> > >
> > > 2) Ignition Amplifer to charge and fire the coil, from a rectangualar
> pulse
> > > comminf from the PCM/ECM. The coil charges when the ECM/PCM sig is high
> and
> > > fires on the falling edge.
> > >
> > > Anouther note is that you must allow time for the firing to ringm\ prior
> to
> > > charging the coil for the next cycle, or you will shorten the firing
> period,
> > > (Bad).
> > >
> > > As to why so many is there are but two big cap types in the same form
> > > factor, and they have different zero corssing dectector phasing, which
> > > affect the pasing of the output DRP. The early units had a high RPM
> problem
> > > and were not long in service.
> >
> > Different in what way? and why?
> > Shannen
> >
> > <snipped>
> >
> 
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