Quote: hi everyone been runing the champions rj12yc which edelbrock recomends but they're getting a rust color on them my specs on my engine are 440 .55 over 11 1/2-1 bme aluminum rods .620 solid roller 6 barrel set up with orange box ignition msd coil and wires never had this color before any help thanks guys
I would have to see but what kind of fuel are you using? Any octane boosters? MMT-methylcyclopentadienyl manganese tricarbonyl(in some fuel and octane boosters) can cause a rust colored deposit. Is the motor running good? Any chance of coolant seepage into your combustion? Any oil consumption? -Bob
