Quote:
Originally Posted by Turbo E320
The M120 fires all twelve cylinders in a 720 degree rotation yes but it does have piston pairs. 1-6, 2-5, 3-4, 7-12, 8-11, and 9-10. It is basically two M104's put together. The M120 had COP's and two ECU's so I guess it only fired six times every 360 degrees but it was because it was COP and not wasted spark.
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95 and earlier did not have COP. They had two distributors on the cams. They had 2 separate ELZ's.