spark plug heat range
#1
spark plug heat range
I have a 68 ss with a 396 with HP cam, don't know what original HP. question I was running NGK spark plugs heat range 6 and plugs ran black with little tan on end. Would going to a 5 heat range (hotter) help them burn more normal. Engine has new holly 700 carb.
Thanks guys
Steve
Thanks guys
Steve
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