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#852367 06/24/21 11:36 pm
Joined: Mar 2015
Posts: 55
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A
alibaba Offline OP
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A
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Forgive me if I am double posting this - but my first effort did not appear.
1962 DBD Clubmans

I was running an NGK B8ES which seemed a good heat range for 'spirited' running.
I gapped at the recommended ..020"

My restored mag is quite strong

I.am switching to an NGK Iridium BR8EIX. Should I be running the same gap?

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The Ir electrode has a smaller diameter than that of the B8ES so if your magneto is properly magnetized to send a negative voltage pulse to the electrode when the points open, it will be able to spark at a lower voltage. Or, looked at differently, you could use a somewhat wider gap and it would spark at the same voltage as your B8ES. That would increase the probability of having the right mixture nearby. But, if you're happy with the 0.020" gap of the B8ES (personally, I gap mine at 0.018" and am happy with that), it will be fine with the Ir version as well.

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Hi All,

The "R" in the BR8EIX signifies a resistor AFAIK, which is not a good idea on magneto ignition as it raises the voltage needed to fire the plug
What does MM think?

John

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I only paid attention to the heat range and electrode and didn't notice it was a resistor plug. I agree with chaterlea25, resistor plugs are to be avoided with magneto ignitions.


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