Dwell Control

[Ward]

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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