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Parts For Detroit Diesel 12V149 Turbo

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Parts for Detroit Diesel 12V149 Turbo Engines

No matter what type of Diesel engine you have, it is of the utmost importance to keep your engine maintained. If you have a 12V149 Turbo engine, you should only put 12V149 Turbo Detroit Diesel replacement parts in your engine when you ever need to repair any parts in your engine. Putting the wrong parts in your engine can result in major problems and hazards later on down the road, even if your engine initially functions well with those parts.

Our parts for Detroit Diesel are designed to accommodate Detroit Diesel engines of virtually every make and model on the market. We have every part that your 12V149 Turbo engine could need to make it operate at its optimum potential, providing you with the fast combustion rate that you need to reach a high horsepower capable of heavy-duty and demanding work. Whether your Turbo diesel engine is for automobiles or industrial equipment, we have all the parts that you need for them here in our online inventory.

Shopping with us is advantageous because you can shop anywhere at any time. You don't have to spend countless hours looking for the parts that you need for your 12V149 Turbo engine since we have them all conveniently listed online here. All it takes is a few minutes to browse our website, select the parts that you need, place your order and wait for your parts to be shipped directly to your door. All our orders are processed quickly and ship within 24 hours of being placed. Additionally, all our orders are eligible for international shipping for your convenience and accommodation.

Detroit Diesel 12V149 Turbo Engine Specifications & Applications

Overview of the Detroit Diesel 12V149 Turbocharged Engine

The Detroit Diesel 12V149T and 12V149TA are turbocharged, high-horsepower diesel engines from the legendary 149 Series, designed for use in marine propulsion, industrial equipment, and power generation. This V12, 2-stroke engine delivers substantial power output, with turbocharging and aftercooling (in TA models) significantly increasing performance and efficiency over the naturally aspirated version.

Each cylinder displaces 149 cubic inches, giving the 12V149T a total displacement of 1,788 cubic inches (29.3 liters). With turbocharging, horsepower can exceed 1,100 HP, while maintaining a compact V12 configuration ideal for tight engine compartments. Thanks to its mechanical fuel system and modular design, the engine remains highly serviceable, rebuildable, and supported by a wide range of aftermarket parts.

Technical Specifications: Detroit Diesel 12V149 Turbocharged (12V149T / 12V149TA)

Specification

Value

Engine Type

90° V12, 2-Stroke Turbocharged Diesel

Total Displacement

1,788 cu in (29.3 Liters)

Bore x Stroke

5.75 in x 5.75 in (146mm x 146mm)

Aspiration

Turbocharged (Aftercooled on TA)

Compression Ratio

~16.5:1

Horsepower Range

875 – 1,100+ HP

Torque Output

Up to ~3,400 lb-ft

Fuel System

Mechanical Unit Injection (MUI)

Cooling System

Liquid-Cooled

Lubrication System

Full-Flow, Gear-Driven

Governor

Mechanical or Electronic

Cycle Type

2-Stroke

Benefits of Turbocharging on the 12V149 Engine

The addition of a turbocharger increases air intake volume and pressure, allowing more fuel to be burned efficiently, significantly boosting horsepower and torque. In the 12V149TA, the aftercooler further cools the air before combustion, improving combustion efficiency and extending engine life.

Performance Advantages of the 12V149T / TA:

  • Increased horsepower for heavy propulsion and high-load operations

  • Improved fuel economy under sustained load

  • Higher torque at lower RPMs

  • Enhanced engine responsiveness and throttle range

  • Better performance at high altitudes and in extreme conditions

These features make the turbocharged 12V149 a popular choice for fast-moving marine vessels and heavy-duty industrial equipment where performance and reliability are equally critical.

Applications of the Detroit Diesel 12V149 Turbocharged Engine

Marine Applications

The 12V149T and TA engines are widely used in commercial and high-speed marine applications that require strong propulsion under load. Turbocharging improves fuel efficiency and acceleration, which are critical for maneuverability and mission timing.

Typical Marine Use Cases:

  • High-speed ferries

  • Offshore supply vessels

  • Military landing craft

  • Dredging equipment

  • Pilot boats and fireboats

Marine-Specific Benefits:

  • High torque output for fast acceleration and load handling

  • Reduced power loss at sea level and under load

  • Compatible with marine cooling, raw water, and exhaust systems

Diesel Pro Power offers complete marine support for 12V149T engines, including:

  • Marine-grade turbochargers and aftercoolers

  • Raw water pumps and impellers

  • Marine exhaust elbows and manifolds

  • Heat exchanger and oil cooler kits

Industrial and Power Generation Applications

Land-based operators use the 12V149T in environments where consistent high output is required. The turbocharged design ensures maximum power density, making it a reliable solution for prime and backup systems.

Industrial Applications Include:

  • Generator sets for oilfields and mining sites

  • Fracking and fluid pumping systems

  • Excavators and drilling rigs

  • Agricultural water transfer pumps

  • Construction cranes and industrial compressors

Industrial Advantages:

  • Fully mechanical engine—no electronics required

  • Modular parts system for easy rebuilds

  • Turbocharging allows higher output without increasing engine size

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