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Spark plugs


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The R is , resistive, made for suppression and need nearly double the HT our cars coils produce, really made for much more modern cars, the resistance will make for a very weak spark and will for many give you misfires and poor running,

Darren runs mega jolt and has modern HT coil or coils


our Ht is around 22kv a modern would be around 32kv or more with a coil for each cylinder shorter dwell times etc.


So never an R on our aged design



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