28-03-2019, 11:00 PM
(This post was last modified: 28-03-2019, 11:02 PM by Stuart Giles.)
(28-03-2019, 08:58 PM)JonE Wrote: Stuart, does that mean that you would religiously maintain carbon leads for any such devices now? I'm intrigued that Ruairidh - one of the key big mileage users - has been absolutely fine with copper.
Is there any disadvantage with using Carbon leads for any other variables to do with Sevens? They aren't very expensive, so not worth not putting them on unless there are...
I cured my particular problem by modifying a 1980s "original equipment" General Motors electronic ignition system to fit my car, OEM electronic equipment tends to be far more robustly designed than aftermarket kit, so my racing car still runs with copper leads and hasn't had an ignition failure in several seasons competition. I run the same electronic module on my tow truck with Copper leads, been running for many thousands of miles without any issues.
But if I was still using one of the aftermarket electronic setups, I would use carbon leads with it. Carbon string HT leads do attenuate the back EMF in a way that Copper leads don't; IMO using Copper leads won't necessarily mean your ignitor module will go phut tomorrow or even the day after, but it does increase the risk of a failure.