Configurations
The engine is available in V-8, V-12, V-16, and V-20 configurations; using the alphanumeric nomenclature utilized by Detroit Diesel, these engines were known as the 8V149, 12V149, 16V149, and 20V149. The first number indicates the number of cylinders per engine, the "V" indicates a V-type cylinder arrangement, and the last set of numbers indicates the series of the engine. Suffixes are commonplace with Detroit Diesel model designations: "T" means the engine is equipped with turbochargers, "I" for intercoolers, and "B" for by-pass Roots-type blowers. For example, a model discussed later in the article is a 20V149 TIB; it has 20 cylinders in a V-type configuration, is a series 149 engine, and is turbocharged, intercooled, and has by-pass blowers. One of the unique features of the 149 engine is its 5¾-inch bore x 5¾-inch stroke; hence, it is known as a square bore design. It has a relatively high power-to-weight ratio. The 20V149 TIB DDEC III SCCC in stand-by generator spec has an output of 2,936 hp (2,189 kW) from a capacity of 2,980 cubic inches (48,800 cc).
Read more about this topic: Detroit Diesel Series 149