[Healeys] Spark Scatter over 4000rpm

[Bluehealey]

Hi Andy
I love that idea for a spark trigger, particularly the stealth nature of the
install. Could you possibly write up how you implemented it? The components
used, how the location was selected, how the timing was set and how the
advance curve is managed?
I have been considering something similar using a trigger wheel behind the
front pulley on my BN4 but your solution has brilliant simplicity.

Alan - from my iPad

> On 28 Feb 2014, at 20:13, Andy Thorp <bce257 at yahoo.co.nz> wrote:
>
> Hi Kees,
>
> Just a quick update- I tried a few other things and then changed to
> crank-triggered ignition and now the timing is perfectly stable at all
speeds.
> The six bolts that hold the clutch cover on are perfectly placed for a
crank
> pickup.
> http://tinyurl.com/n46t9t8
>
> Given that other engines I checked also jump the timing around at speed I'm
> thinking it is a fairly normal thing. It didn't make any more power with
the
> improved accuracy but it does subjectively sound sweeter at high rpm.
>
> Thanks for the replies.
>
> Andy.
>
>
> --------------------------------------------
> On Wed, 26/2/14, Oudesluys <coudesluijs at chello.nl> wrote:
>
> Subject: Re: [Healeys] Spark Scatter over 4000rpm
> To: healeys at autox.team.net
> Received: Wednesday, 26 February, 2014, 12:28 AM
>
> Andy,
>
> Replace the no. 1 spark plug lead using a copper core lead
> and a
> standard non resistor cap and try again. Also make sure the
> pick up
> clamp is clean, intact and closed properly
> If it still shows the deviations you describe and if the
> engine runs
> smooth at the given rpm it may well be the Hella Optilux.
> Although it is
> an excellent timing light it could be rather old by now and
> may not work
> properly any more. These were first made over 30 years ago.
> During the
> years the design has had little change.
>
> Kees Oudesluijs
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