Number of cylinders, all inline unless followed by a "V", then V-type
51 series: 2, 4
53 series: 2, 3, 4, 6V, 8V, 12V
71 series: 1, 2, 3, 4, 6, 6V, 8V, 12V, 16V, 24V
92 series: 6V, 8V, 12V, 16V
110 series: 6
149 series: 8V, 12V, 16V, 20V
I am sure these are right, but I may have left off a 20V or 24V on some, as I don't know for sure if they were made in some of the series.
Engines bigger than 149 series are not really "Detroit Diesels" but made by the "Electromotive" division of GM, not sure who owns them now, or if they are on their own? These big ones are primarily used by railroad, marine, and power generators.
Grigg
