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Re: RE: Strange Ignition Behaviour (was This is scary stuff)

To: "Dodd, Kelvin" <>
Subject: Re: RE: Strange Ignition Behaviour (was This is scary stuff)
Date: Thu, 28 Jul 2005 14:24:23 -0500
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.


----- Original Message -----
From: "Dodd, Kelvin" <>
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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