You are right, you do not "have to" but you "can". Some classics do run
lean in certain conditions when you hold back the throttle a bit going
down a hill, e.g. Weber/DellOrto/Solex side drafts, causing a lot of
spitting and plopping. A fatter spark will often help.
What are/is LBC?
Kees Oudesluijs
NL
Richard Ewald schreef:
> make that 0.028"
> DOH!
> Rick
>
> On Tue, Sep 29, 2009 at 7:22 AM, Richard Ewald
> <richard.ewald@gmail.com <mailto:richard.ewald@gmail.com>> wrote:
>
> You do not "have to" increase the gap when running electronic
> ignitions. I can name plenty of cars that came with factory high
> energy electronic ignition systems that have relatively small plug
> gaps. Volvos for example have a coil capable of putting out 40KV
> and have a factory recommended plug gap of 0.28".
> Wider gaps are done by some ignition system designers to help cope
> with lighting off the leaner mixtures found on today's modern
> engines.
> There are four words generally never found in the same sentence
> when discussing LBCs. They are:
> Modern
> Lean mixture
> S.U. Carburetor.
> :-)
> Rick
>
>
> On Tue, Sep 29, 2009 at 1:09 AM, Oudesluys <coudesluijs@chello.nl
> <mailto:coudesluijs@chello.nl>> wrote:
>
> Rick,
> You are right up to a point. When you run a high energy coil
> or electronic ignition you also have to increase the gap of
> the plug considerably, thus creating the need for a higher
> voltage to spark. It is all about energy, a stronger spark
> through higher voltage and/or longer duration. The system also
> needs sufficient capacity to be able to release the extra energy.
> In the standard set up of cars I have never come accross bad
> plugs although I have heard stories enough in the past about
> Champion being lousy plugs. If things went wrong with the
> plugs, it was usually carburettor related.
> Kees Oudesluijs
> NL
>
>
>
>
>
>
>
>
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