<VV> Coils

[Hugo Miller]

Of course if the points gap is too small that will cause the coil to 
get hot also, but shouldn't be enough to cook it. The engine will stop 
before that happens normally.
A 9 volt coil is one that needs a 9v supply under load - i.e. the one 
on the Corvair! If the coil in question is getting too hot and failing, 
that suggests the resistor is not dropping the voltage down to where it 
should be.
The 'AC' in AC Delco was Albert Champion if I recall, as in spark 
plugs. Kettering was a very clever man - he pioneered 2-stroke diesels I 
believe.

On 2020-02-17 17:06, Dale Smiley via VirtualVairs wrote:
> Based on the original message I think you are passing too much
> current thru the Coil Primary and burning it out!
> The "Coil gets hot" comment points directly to that. I would measure
> the input resistance of the Coil (+ terminal to - terminal). Here is
> the good old States this should be around 1.5 ohms for a Coil that
> "NEEDS" a RESISTOR (external or a piece of Resistance Wire in the
> harness) to limit the Primary current to around 4 Amps. A "12 Volt
> Coil" should have a Primary resistance of 3 ohms. I have never heard
> of a "9 Volt Coil" but I haven't owned a British car since 1976! The
> "Inductive Ignition System" that we are talking about was developed 
> in
> 1910 by Charles F. (BOSS) Kettering, Chief Engineer at the Dayton
> Electric Laboratory Company in Dayton, Ohio for use in the 1910
> CADILLAC (Dayton Electric Laboratory COmpany = DELCO)!
>
>
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