[TR] Pertronix Question

dave dave at ranteer.com
Mon Dec 28 16:30:42 MST 2020

Absolutely 3.0 ohms.  The 1.5 ohms is for the cars that have a ballast resister built in


Pertronix makes a flame thrower coil which is excellent.


Also, btw, Pertronix tech support is really wonderful.  I had ordered the wrong part on an igniter set which previously had failed but out of warranty.  I called tech support and they sent me the correct part free!


From: Triumphs <triumphs-bounces at autox.team.net> On Behalf Of Roger Elliott
Sent: Monday, December 28, 2020 4:43 PM
To: triumphs at autox.team.net
Subject: Re: [TR] Pertronix Question


The instruction sheet I found has this:

Q. What type of coil do I need?
A. The ignitor is compatible only with a “points type” coil. Eight cylinder engines require a minimum of 1.5 Ohms of resistance in the primary circuit. Four & six cylinder engines require a minimum of 3.0 Ohms of primary resistance 

So, it sounds like the 3.0 Ohm.

Link to instrucations: https://cdn.shopify.com/s/files/1/0247/6913/4628/files/LU-142A.pdf


On 12/28/2020 3:58 PM, Jim Henningsen wrote:

Anyone know if we should be using a 1.5 ohm or 3.0 ohm flame thrower coil
with the LU-142A pertronix ignitor?  1967 Triumph TR4A.
Jim Henningsen
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