The Detroit Diesel Series 60 engine line, particularly the 14 liter variant, has a significant place in trucking history. Known for its innovative electronic controls and overhead camshaft design, the Series 60 revolutionized on-highway engine applications. This article delves into the specifics of the Series 60 14 Liter Detroit Diesel, comparing it to its predecessor, the 12.7 liter version, and highlighting its key features.
Series 60 14 Liter Detroit Diesel: A Detailed Overview
The Series 60 was a groundbreaking engine series, being the first to feature an electronic control system in on-highway applications. While the 11.1 liter and 12.7 liter versions were initially popular, especially in bus applications, the 14 liter variant eventually became the preferred choice for Freightliner, solidified by a joint venture between the two companies. Let’s explore the key differences between the 12.7L and 14L models:
Size and Displacement of the Series 60 14 Liter
The 14 liter engine, as its name suggests, boasts a larger physical size compared to the 12.7 liter. This translates to a larger bore and stroke (5.24 in and 6.62 in respectively, compared to 5.12 in and 6.30 in on the 12.7L). Consequently, the 14L has a higher displacement, meaning it can draw in more air and fuel, leading to increased power output.
Horsepower and Torque in the Series 60 14 Liter
The increased displacement of the Series 60 14 liter results in a noticeable bump in horsepower and torque. While the 12.7L offers 380-455 horsepower at 1,800 RPM, the 14L delivers 425-515 horsepower at the same RPM. Torque also sees a significant increase, with the 14L producing 1,550-1,650 lb-ft at 1,200 RPM, compared to 1,350-1,550 lb-ft in the 12.7L. This enhanced performance stems largely from the 14L’s larger crankshaft.
DDEC System Evolution in the Series 60 14 Liter
Both the 12.7L and 14L Series 60 engines utilize the Detroit Diesel Electronic Control (DDEC) system. The 12.7L saw iterations from DDEC I through IV, with the latter introduced in 1999. The 14L, launched in 2001, benefited from DDEC IV and its subsequent updates, including a revised cylinder kit and enhanced fuel injection control. These advancements provided more precise engine management and improved efficiency.
Choosing Between the 12.7L and 14L Series 60
Determining the “better” engine depends on individual needs and priorities. While the 12.7L might be favored for certain applications due to its size and fuel economy, the Series 60 14 liter Detroit Diesel offers a substantial increase in power and torque, making it suitable for heavy-duty trucking. Both engines, however, are renowned for their durability and reliability, hallmarks of the Series 60 line. The advancements in the 14L, particularly with the DDEC system, contribute to its overall performance and efficiency.
