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John Tones wrote:
> For years the larger diesel trucks have used 24 volts for starting the
> engine but ran all lights and accessories from 12 volts. This is
> accomplished via a solenoid system that connects two 12 volt batteries
> in series when the starter is energized and at the same time drops all
> 12 volt loads off circuit. Once the starter is de-energized everything
> runs on 12 volts including the charging system. The ones that I am
> familiar with are a block with the required terminals sticking out of it
> for the battery and load connections and is about 6 inches or less
> square. This would allow you, if you are stuck with it, to use the 24
> volt starter and make no other changes or purchases.
> I am sure that any decent sized truck parts shop could set you up with
> the parts required plus directions on connecting it up, and like I said,
> this system has been in use for years in these units so its definitely
> reliable and does not involve a whole lot of wiring and controllers. You
> are correct - 24 volts will give more mussel to the starting and that's
> why the trucks use it.
>
> John Tones "Penta"
> Sidney, BC
>
You are right that the technology has been around along time. We used
the same thing to start our hot rods when most systems were 6 volt. A
seriously built 59AB Ford flat head took some serious oomph to start.
Don Wilson
Looking again
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