71Twister440
Well-Known Member
NGk FR4, darker pluga next to the new plugs are before i cleaned the carbs and was at about 14 initial timing, the 1,7,8 plugs are also FR4 but after with 18 initial timingWhat range are those? You should be taking the cad of about a thread down for pump gas. You are at the tread. So that's a bit cold. You should see an improvement with 1 range hotter plug and you should be able to pull a little timing out.