Re: [Chrysler300] Distributor rebuild - where?

["Don Verity" <d.verity@xxxx>]

Dwell is the time in degrees that the coil is building up energy to fire the
spark plugs. More is better, to an extent. To much will leave you with a
small point gap and they will burn rapidly, to little and you will not get
enough coil saturation time and will wear the rubbing block on the points
faster. The reason for duals is to get more dwell without the bad effects of
a small point gap. Just before the first set closes, the second starts to
open, so you get the combined dwell of both sets. Each runs at 28-32
degrees. With both running you get almost 40. I usually change the points in
my G every couple of years. Back in the "old days" when all cars had points
and were daily drivers, tune-ups were a twice a year thing. Changing your
point gap will change the timing, as will point wear.Worn bushings on an
electronic distributor won't effect dwell. If it's bad enough though, the
reluctor will contact the pick up coil with bad results! Worn bushings in a
point set up will definitely effect dwell because the shaft is moving around
changing the point gap. On most single point systems, the vacuum advance
will change the dwell also. Sometimes by 4-5 degrees. The dual systems
breaker plate rides on a bearing and is much more accurate, usually within a
degree.
300ly,
Don
----- Original Message -----
From: Owen & Jo Grigg <ram300@xxxx>
To: <chrysler300@xxxxxxxxxxxxxxx>; John Hertog <crossram@xxxx>
Sent: Monday, December 16, 2002 1:15 PM
Subject: Re: [Chrysler300] Distributor rebuild - where?


> Hi John & all
>
> I am running a Pertronix unit on my 300C, doesn't seem to be any
noticeable
> difference in idle or performance. Haven't checked the dwell, just
installed
> the Pertronix and put a timing light on the crank. I thought the main
> reason for correct dwell angle was to take the heat away from the
> points....stop them burning out? Does it also effect ignition timing? Can
> you compensate by turning, advancing/retarding the distributor? Could it
> just be flogged distributor bushes causing problems on some cars with
> Pertronix systems?
> As you can see I'm a bit of a novice when it comes to distributors.....so
go
> easy on me ok.
> What are the symptons I should be looking for??Don't much like changing
> points, but if it makes more power.......
>
> Owen
>
>
> ----- Original Message -----
> From: John Hertog <crossram@xxxx>
> To: John L. Chesnutt <chesnutt@xxxx>;
<chrysler300@xxxxxxxxxxxxxxx>;
> Vath, Michael J. <mjvath@xxxx>
> Sent: Tuesday, December 17, 2002 6:56 AM
> Subject: [Chrysler300] Distributor rebuild - where?
>
>
> > Hi Mike,
> >
> > The actual bushing is available from NAPA . I don't recommend the
> > Pertronix - dwell is unacceptable, and cars I installed Pertronix on had
> to
> > be reconverted to points. As far as rebuilder, you might want to contact
> Don
> > Verity - d.verity@xxxx ; he has a Sun distributor machine, and can
set
> up
> > the distributor properly as per spec once he has rebuilt it. Don's
rebuilt
> a
> > few for me.
> >
> > John
> >
> >
> >
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