Spark plugs

Started by Cyclops, 15 Nov, 2024, 14:25

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Cyclops

'69 Firebird (high comp eng.) Fitted with Boyer electronic ignition. Have been using resistor type NGK BR8ES plugs. Is this ok or should i revert to non-resistor plugs.

Roy

Well in my opinion I would either use resistor spark plugs and Non resistors plug caps ,or the other way round , but that's only my opinion,regards Roy

rhyatt

resistive plug caps are either 5K or 10K ohms
R spark plugs have an internal 5K resistor
so only use a 5k plug with a 5k cap

originally there would have been copper ht wires with a screw on 10k Champion cap
too much resistance gets in the way of the spark reaching the plug and can cause the spark to find an alternative way to earth

Dean Southall

I would ask Boyer 01622 730939
I have always found them very helpful when phoning for advice.
BSA: turning ordinary men into mechanics since 1910

iansoady

The Boyer instructions I have say either resistor cap or plug. Like Dean I've found them very helpful.
Ian.
1964 Norton Electra
1969 BSA / Suzuki DZR400 / Steib S501
2016 Herald Classic 250

Cyclops

thanks for the advise fellas.