Introduction
If you are looking to turbocharge your car, you’re probably excited about the prospect of making more power and hearing those cool turbo noises. However, the process of choosing a turbo can be overwhelming and confusing. How do you know which turbo is right for your car? How do you ensure that everything works together harmoniously? How do you prevent your engine from blowing up? In this article, we will guide you through the process of choosing a turbo for your car, providing you with all the information you need to make an informed decision.
Turbo Basics: How Does a Turbocharger Work?
Before we dive into the nitty-gritty details of turbo selection, it’s essential to understand the basics of how a turbocharger works. A turbocharger consists of two main components: the hot side and the cold side. The hot side deals with the exhaust gases, while the cold side handles the fresh air being sucked in from the atmosphere.
When exhaust gases pass through the turbine inlet, they spin a fan known as the turbine wheel. Simultaneously, the spinning turbine wheel also powers the compressor wheel located on the cold side. The compressor wheel pressurizes the fresh air and forces it into the engine, resulting in increased power.
Understanding Turbo Measurements and Terminology
Now that you have a grasp of the fundamental principles of turbocharging, let’s explore the various measurements and terminology associated with turbos.
Inducer and Exducer
Turbo wheels, such as the compressor and turbine wheels, consist of two sides: the inducer and the exducer. The inducer is where the air comes in, while the exducer is where the air exits. These measurements play a crucial role in determining the airflow capacity of the turbo.
Trim
Trim refers to the ratio of the inducer to the exducer of a wheel. A higher trim number indicates that the wheel can flow more air. It’s important to consider the trim when selecting a turbo, as it affects the turbo’s ability to deliver the desired power output.
AR Rating
The AR (Area over Radius) rating of a housing reflects its airflow capacity. Larger AR numbers indicate a greater ability to flow exhaust gases, which is vital for maximizing power output. However, larger turbine housings can result in increased lag, while smaller housings may limit airflow at higher RPMs.
Compressor Maps
Compressor maps are a valuable tool for turbo selection. They provide a visual representation of a turbo’s airflow capacity and pressure ratio. By analyzing compressor maps, you can determine whether a turbo will operate efficiently within the desired power range.
Selecting the Right Turbo for Your Car
When selecting a turbo for your car, several factors come into play. It’s crucial to consider your engine’s displacement, power goals, and preferred driving characteristics. You want to ensure that the turbo you choose can effectively flow the required amount of air to achieve your desired power output.
For example, if your goal is 500 horsepower, you would need a turbo capable of flowing around 50 pounds of air per minute. On the other hand, if you prioritize responsive low-end power and enjoy street driving, a smaller turbo that flows around 27 to 30 pounds of air per minute might be a better choice.
Remember to refer to compressor maps to identify turbos that fall within the efficiency islands, ensuring optimal performance and power delivery.
Conclusion
Selecting the right turbo for your car is crucial to achieving your desired power output and driving experience. By understanding turbo measurements, terminology, and utilizing tools like compressor maps, you can make an informed decision that suits your needs.
Whether you prioritize maximum peak horsepower or responsive low-end power, there is a turbo out there for you. Don’t let the overwhelming options deter you from turbocharging your car and experiencing the thrill of increased power and performance.
Buckle up and embark on your turbo journey today!
