Is there a reason for running the MSD ("Multi-Spark Discharge") coil? The stock HEI coil can produce 50,000+ volts, and that will fire a spark plug with the ground electrode removed. One feature of most MSD systems is the fact that each spark plug is fired 4 or 5 times in the same amount of time it takes the conventional system to fire it once. On an oscilloscope, I can see 5 separate firing lines, compressed into about 5 milliseconds or so. If you're doing one long-duration spark with the MSD coil, it's possible it's firing a spark through the plug boot to ground and burning holes in the boots. I'd go back to a regular HEI coil, and find somebody who's just got to have that MSD coil for the brag factor. It's certainly not necessary for routine driving.
Jerry
Last edited by Hotrod Lincoln; 05/20/2010 5:02 PM.
