Twin Point Query

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Taffy - 20 Mar 2004 17:40 GMT

I've just carried out a full service on my niece's Mini Paul Smith LE
and I also replaced the ignition leads, well after almost 60,000
miles we thought it wise and anyway it was missing a bit driving it
in the rain.

My question is, ok I know twin point Mini's are distributorless, but
is there an equivalent of a rotor arm that needs replacing too?

Any advice appreciated.

Taffy

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Jono Barspeed - 20 Mar 2004 18:01 GMT

Nope, its all in built, the ignition comes from a Vauxhall control box and
fancy looking sealed unit distributor, its all electronic with non moving
parts

Jono

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> I've just carried out a full service on my niece's Mini Paul Smith LE
> and I also replaced the ignition leads, well after almost 60,000
[quoted text clipped - 7 lines]
>
> Taffy

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Ray - 20 Mar 2004 18:03 GMT

> My question is, ok I know twin point Mini's are distributorless, but
> is there an equivalent of a rotor arm that needs replacing too?
>
> Any advice appreciated.
>
> Taffy

No. It does not have a rotor arm.
It has two ignition coils. Each coil fires a spark into two sparkplugs
simultaniously, so two coils for four plugs.
The coils are connected in such a way that when a coil fires, one spark is
for the plug that is in a cylinder that needs to light the mixture, and the
other spark is to a plug that sparks in a cylinder that is filled with
exhaust gas.

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Bye, Ray

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The Muffin Man - 20 Mar 2004 18:58 GMT

That is how my bike (a triumph twin) electronic ignition does it, both spark
simultaneously even though they fire alternately.

The Muffin Man

> > My question is, ok I know twin point Mini's are distributorless, but
> > is there an equivalent of a rotor arm that needs replacing too?
[quoted text clipped - 10 lines]
> other spark is to a plug that sparks in a cylinder that is filled with
> exhaust gas.

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Taffy - 23 Mar 2004 15:45 GMT

Cheers folks and the Mini is running fine now with new ignition leads
anyway.

Taffy

> That is how my bike (a triumph twin) electronic ignition does it, both spark
> simultaneously even though they fire alternately.
[quoted text clipped - 16 lines]
> > other spark is to a plug that sparks in a cylinder that is filled with
> > exhaust gas.

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Steve - 25 Mar 2004 18:40 GMT

> That is how my bike (a triumph twin) electronic ignition does it, both spark
> simultaneously even though they fire alternately.
>
> The Muffin Man

Citroen 2CV's fired both cylinders (wow, such power!) on every stroke. It is
an excellent method of simplifying the ignition system. They ran points, but
no distributor. There was a simple mechanical advance run directly off the
end of the camshaft. The single coil just had two outputs, one to each plug.
It did have the down side of working the plugs and leads hard though. They
needed replacing every 3000 miles max. Ah, memories......!

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Rgds
Steve
steve@dsnclassics.co.uk
www.dsnclassics.co.uk

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