[Healeys] coils

[richard mayor]

There are two types of coils. Those that have an internal resistance of 3 ohms and therefore do not need a ballast  resister. The other type has an internal resistance of 1.0 - 1.5 ohms and will burn up the points without a ballast resister in line with the coil.  

A Pertronix or any other electronic trigger does not need a 3 ohm coil or a 1.5 ohm coil with ballast resister because it does not have points that would get burned up with a continuous 12 volts. 

  
Richard Mayor
boyracer466 at gmail.com



> On Sep 9, 2025, at 8:51 AM, Hank Leach via Healeys <healeys at autox.team.net> wrote:
> 
> I believe the ballast resistor was a unit which helped to keep a traditional set of points from burning/sparking.  The Jensen-Healey uses such an arrangement.  However, due to the inaccessibility of the distributor (under the manifold) I converted to Pertronix years ago. Then one day the car would not start. I mapped out the ballast resistor using a paper clip and was on my way. Hank
> -------------------- 
> 
> From: "Engl via Healeys" <healeys at autox.team.net> 
> Reply-To: "Engl" <engl at accesscomm.ca> 
> To: "Richard Antal" <rantal243 at yahoo.com> 
> Cc: "Healeys" <healeys at autox.team.net> 
> Sent: September 8, 2025 at 8:25 PM PDT 
> Subject: Re: [Healeys] coils 
> Rich
>  
> I have petronix with the non-ballast Lucas Sportcoil (‘65 BJ8).  I think the ballast coil is used only for cars with a ballast resistor in the ignition circuit (like the ‘72 Jaguar XJ6 I had). 
>  
> No experience with the Petronix coil. 
> 
> Bob England
> 
> On Sep 8, 2025, at 2:28 PM, Richard Antal via Healeys <healeys at autox.team.net> wrote:
> 
> 'Greetings all,
>     My BJ8 has. a Pertronix ignition. Should it have a ballested or non-ballested lucas sport coil? I note the Moss catalogue has a Pertronix coil; does anyone have experience with this coil and is it a better choice than the Lucas coil? 
> Thanks to all responders.
> rich antal
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