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Message: <blockquote data-quote="C5Performance" data-source="post: 97473" data-attributes="member: 2938">So tell me again what multiple sparking does (beyond the basic statement made earlier).Imagine your engine drawing in a fresh gulp of unburned fuel and air. Your piston rises and compresses this cloud into a smaller and smaller area. Just before your piston reaches the top, the spark plug ignites with a HUGE ball of energy. What happens next is an incredible thing. The fuel begins to burn at temperatures exceeding 2,000 degrees F. Yes, that's right....10 times the heat that your temperature gauge shows!The burn starts at your sparkplug tip and moves outward toward the cylinder head, cylinder walls, and piston top. As the burn works outward, a wave is created at the flame front. Just before the flame reaches the edges, the wave moves back upon itself and the flame goes out. WOW...that was a close one! If that 2,000 degree heat reached your engine it would have melted down fast. So what happened to that layer of cool unburned fuel?In a normal engine it would be pumped out of the cylinder as unburned fuel and that's what you smell on most carbureted engines, especially during cold starting. The energy from that unburned fuel is wasted. Some of the unburned fuel leaks past your rings, especially during cold starts, and contaminates your engine oil. What if there was a way to ignite that fuel instead?  :headscratch:</blockquote>