Turbo Balancing

Types of Turbochargers

There are different types of turbochargers that vary in size and are designed to meet specific engine needs. The sizes range from small and compact to medium and large. The size of a turbocharger depends on factors like engine size, power needed, and vehicle use. Here are some common turbocharger sizes to help you in your search for your desired and correct turbo for your vehicle. 

Small Compact Turbos

Small/compact turbos are specifically designed for smaller engines with lower power outputs. These turbos are commonly used in compact cars due to their size and weight considerations. Compact cars often have limited engine bay space, and small turbos can fit into tighter spaces more easily. Similarly, motorcycles with turbochargers tend to use smaller units to maintain a lightweight and compact design. 

One of the key advantages of small turbos is their ability to spool up quickly. Spooling refers to the time it takes for the turbo to start producing boost pressure. Smaller turbos have smaller parts, which makes them faster and able to provide pressure to the engine at lower speeds. Small turbos have a quick spooling characteristic that improves engine responsiveness. This makes them a good option for situations where low-end torque is needed, and prevents a slow throttle response.

Small turbos are also prevalent in entry-level performance vehicles. These vehicles aim to provide a balance between fuel efficiency and performance. By adding a small turbocharger, manufacturers can boost the power output of the engine without sacrificing fuel economy. This allows entry-level performance vehicles to offer a more spirited driving experience without the high fuel consumption of larger engines.

Medium-sized Turbos

Medium-sized turbos are typically used in engines with moderate to larger displacements, such as 2.0 to 3.5 liters. These engines are commonly found in mid-sized sedans, sporty coupes, and some light-duty trucks. Medium-sized turbos are chosen to provide an optimal balance of power and efficiency for these vehicles.

Medium-sized turbos are engineered to offer a good level of responsiveness. While they may not spool up as quickly as small turbos, they still provide adequate boost pressure at lower engine speeds. This ensures a responsive throttle and good low-end torque, making them suitable for a variety of driving conditions, including city driving and spirited acceleration.

While they excel in providing low-end torque, they are also capable of delivering impressive top-end power. The larger compressor and turbine wheels allow for greater airflow at higher engine speeds, enabling increased horsepower and performance. This makes medium-sized turbos suitable for drivers who desire both spirited acceleration and high-speed cruising capabilities.

Medium-sized turbos are versatile and can be applied to a wide range of vehicles and driving scenarios. They are commonly used in mid-sized sedans, offering a balance between fuel efficiency and performance. Additionally, sporty coupes benefit from medium-sized turbos as they provide the power necessary for exhilarating acceleration. Some light-duty trucks also utilize medium-sized turbos to provide the desired power for towing and hauling applications.

Large-sized Turbos

Large Turbos are typically used in engines with larger displacements, such as 3.0 liters and above. These engines are commonly found in sports cars, high-performance sedans, and racing applications. Large turbos are chosen to provide the necessary airflow and boost pressure to achieve high levels of power output.

They can handle higher boost pressures compared to smaller turbos. Boost pressure refers to the amount of compressed air being delivered to the engine. With larger turbos, higher boost pressures can be achieved, allowing for increased power production. Higher boost pressures also contribute to improved engine response and acceleration. 

Large turbos excel in providing top-end performance. The larger compressor and turbine wheels allow for greater airflow at high engine speeds, enabling the engine to produce higher levels of power. This makes large turbos ideal for applications where reaching high speeds or track performance is a priority.

Due to the increased airflow and higher boost pressures, large turbos generate more heat during operation. Proper heat management becomes crucial to prevent overheating and potential damage to the turbocharger and engine components. Intercoolers and efficient cooling systems are often employed to maintain optimal performance and reliability.

Twin Turbos

The twin-turbo setup ensures a continuous supply of compressed air to the engine. Each turbocharger works in parallel, supplying air to separate banks of cylinders in the engine. This arrangement allows for a more even distribution of airflow and ensures that each cylinder receives an adequate amount of air for combustion. The result is improved power delivery, smoother acceleration, and enhanced overall engine performance.

One of the key advantages of a twin-turbo setup is improved responsiveness. By dividing the workload between two smaller turbos, each turbo can spool up more quickly, resulting in reduced turbo lag. Turbo lag refers to the delay in boost response that occurs when the turbocharger takes time to reach its optimal operating speed. With twin turbos, the smaller size and lower inertia of each turbo allow for quicker spooling, providing near-instantaneous boost pressure and improved throttle response.

Twin turbos can be designed and tuned to provide a broad power band, offering ample torque and horsepower across a wide range of engine speeds. Using two smaller turbos can improve power delivery at low engine speeds and increase top-end power at higher engine speeds. This flexible power band allows for enhanced drivability and performance in various driving conditions.

These Twin-turbo setups are commonly found in high-performance vehicles and some luxury cars. These vehicles often have engines with larger displacements and high power output requirements. The twin-turbo configuration allows manufacturers to achieve the desired performance levels without compromising on responsiveness and drivability. Examples of vehicles utilizing twin turbos include sports cars, high-performance sedans, and certain luxury SUVs.

It’s important to note that the specific turbocharger size and specifications can vary depending on the manufacturer, engine configuration, and intended use. Turbochargers are often matched to the engine’s characteristics to optimize performance and efficiency. If you want to choose a turbocharger or upgrade it, it’s a good idea to talk to experts. They can help you find the right size and specifications for your needs.