quote:

Originally posted by jmarkaudio:
If that is a methanol plug I would try a hotter plug. Methanol takes a long time to color like that if everything is right, even E85 stays white for a long time. Excessively rich or cold won't keep it clean. Even with methanol I don't pull out any higher than 140. Cold engines make power, as long as you get sufficient vaporized fuel and a hot enough spark. Methanol can be challenging, it takes a lot of heat out of the engine to vaporize. Over fueling makes it worse...