In the vernacular: "you da man!".
Actually (specific years aside) I think in the case of the rally car it was a
coil that was suffering from primary
winding failure (shorting out). I figured it out when I was looking through a
shop manual, saw a resistance
value for the coil and thought "Hey, I are a engineer. Go to lab and get
ohm-meter thingy!".
Coil was replaced with a Lucas Sports Coil. Later points were replaced with
some nice non-melting,
non-"give me attention" semiconductor bits. Then I was adjusting mixtures with
a color tune and
get smacked. Wow! I've never checked my personal calibration in the kilo-volt
range, but suffice to say
(from experience) that the electronic ignition plus sports coil makes a spark
that is far more attention
getting than any points type system that I've been hit by.
I will never go back to points, unless I'm racing in a vintage/historic class
that requires it.
-Keith
----- Original Message -----
From: "Dodd, Kelvin" <doddk@mossmotors.com>
Date: Wednesday, July 27, 2005 4:38 pm
Subject: RE: Strange Ignition Behaviour (was This is scary stuff)
> Ok. I bite.
>
>
> Incorrect coil, causing too much current to flow through the points.
> The points heat up and the plastic lift block starts to melt reducing
> the point gap to zero.
>
>
> Very common if someone is working on a pre-72 MGB and can get their
> hands on later parts car bits. Stuff the coil from a 72- car into an
> early one and it happens every time.
>
>
> How did I do?
>
>
> Kelvin Dodd
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