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.
Detroit Diesel model designations often include suffixes that provide additional information about the engine's features: "T" indicates turbocharging, "I" represents intercooling, and "B" signifies by-pass Roots-type blower functionality.