Just got my LS5 engine rebuilt to stock specs except for a bump in compression to 9.5-1. Stock cam, carb, everything. 50 test miles on engine and I have fouled the #6 plug twice. Not fuel or oil fouled but black carbon. Other plugs are lightly carboned. I have AC 44t plugs in along with a new cap, rotor, points, wires and condensor. Are the plugs to cold? ANY suggestions? THanks, John
1972 Corvette LS5 plug fouling question
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