For example, if
> you have 1.0 ohm on the glow plug and 13V on a
> battery, then the glow
> plug wants 13 amps. In this case, a 10A fuse would
> simply blow
> immediately. The power requirement would be 13A *
> 13V = 169Watts.
but be careful - i don't think it's quite that simple.
as the glow plugs heat up the resistance changes. i
don't know what the graph would look like, but it's
not a constant.
>
> Another idea to consider is to use two glow plugs
> wired in series to
> reduce the power. This doubles the resistance.
> With P=V*I and I=V/R
> you get the formula P=V*V/R =13*13/2 = 85Watts.
> This would require
> 6.5Amps.
>
another benefit of using multiple plugs in series is
having more surface area for heating of the oil. i
like that idea.
> Also, it was suggested by someone else that the glow
> plug fuel heater
> should be placed upstream of the fuel filter. I
> believe the Ford
> Powerstroke diesel has a heater wire in the fuel
> filter bowl in order to
> preheat the fuel. Furthermore, this fuel bowl is
> nestled in the V of the
> block and so benefits from the engine block heat.
> You might want to
> look at this concept, maybe even retro this fuel
> filter/heater assembly
> into your setup.
>
> Good luck,
> Rob
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