Rob,
This sounds right to me also, It's been years since I ran std points, but I
remember a 12V coil and
a resistor to run thru from the ignition to the coil, otherwise the points only
lasted a few months before
being burned and pitted. The reason the wire goes from the starter to the
supply side of the coil is
when you are cranking the engine, the entire system voltage drops to about
10.5V (high load from starter)
and this maintains about 10V to the ignition system.
Sheldon Schmidt '56 napco 4x4
I could be wrong here, but isn't this sorta backwards? In other words,
shouldn't you use a resistor with the 12 volt coil if using a 12 volt
battery/system, but if running a 6v system (battery and coil) then no
resistor is necessary. Now, if you are using a 6v coil in a 12 volt system,
I'd have to say, "why"?
The purpose of the resistor, is to allow the full 12 volts for cranking,
then it cuts the voltage down to conserve the points. Now, as I said, I
could be wrong, but this is the way it was explained to me, and made sense
then and now.
Rob
----- Original Message -----
From: Thomas Allen <thomasa@halcyon.com>
To: Allen L. Jones <ALJ@hartcrowser.com>
Cc: <oletrucks@autox.team.net>
Sent: Thursday, May 06, 1999 10:17 AM
Subject: Re: [oletrucks] External Coil Resistor
> Alan:
>
> If you keep the 6V coil you will need a balast resistor between the ign.
sw
> and the coil. If you use a 12V coil, no resistor is needed. The factory
12V
> systems of 55 and later used a 6V coil and balast resistor and eventually
> (I don't remember the year) a resistance wire instead of the resistor. The
> resistor was bypassed during starting by a wire running from the starter
> solonoid -- or switch, in the case of the sixes prior to '60 -- to the
> coil. That system gave a hotter spark during starting. I havn't found it
> necessary to bypass the resistor. I typically run the starter till I see
> some oil pressure before I turn on the ignition. Otherwise it starts too
> fast and with no oil pressure.
>
> Tom Allen
> 51 3800
>
> At 08:57 AM 5/5/99 -0700, Allen L. Jones wrote:
> >I've converted everything over to 12 volts with only the coil remaining
to
> purchase (kept the point distributor and changed to a 12V starter). Do I
> need to run an external resistor with an external 12V coil? If so, does
it
> go between the starter bypass and the coil or the regular 12V feeder wire
> (from the cab) and the coil? I've looked at the chevytrucks web site and
> see no reference to what brand/type/size of resistor I would need. Can
> anyone tell me? Thanks for the h_e_l_p.
> >
> >Allen
> >'50 3100 (damn near finished.....)
> >
> >oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
> >
> Tom Allen
> Seattle, WA
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
>
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