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Old 12-13-2009, 10:56 PM
Roncallo Roncallo is offline
88Black560SL
 
Join Date: Oct 2004
Location: CT
Posts: 3,510
Quote:
Originally Posted by Turbo E320 View Post
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.
95 and earlier did not have COP. They had two distributors on the cams. They had 2 separate ELZ's.
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