Superchargers types compared... Centrifugal, and Positive displacement. Which is right for you?

When it comes to boosting the performance of your vehicle, a supercharger is a popular choice. Superchargers are devices that force more air into the engine, resulting in increased power and torque. But with different types of superchargers available, how do you know which one is right for you? In this blog post, we'll explore the differences between centrifugal and positive displacement superchargers, so you can make an informed decision.

What is a Centrifugal Supercharger?

A centrifugal supercharger uses a compressor wheel and a housing to compress the incoming air. As the engine's crankshaft spins the compressor wheel, it draws in air and compresses it before delivering it to the engine. This type of supercharger is typically mounted like your other belt driven accessories on a bracket inline with your alternator, power steering pump.. etc Benefits of this remote mounting, allow for better heat dissipation. A Centrifugal supercharger is also known for its high RPM capability and efficiency at higher engine speeds.

What is a Positive Displacement Supercharger?

A positive displacement supercharger, on the other hand, uses a set of interlocking gears or lobes to compress the air. It operates by trapping a fixed amount of air between the rotors and delivering it to the engine. This design allows for instant boost and increased torque at lower RPMs, making it ideal for street applications. As you probably guessed, this type of supercharger typically sits directly on top or, you attached directly to the engine..

Performance Differences

Both centrifugal and positive displacement superchargers have their own advantages and disadvantages when it comes to performance. Centrifugal superchargers are known for their ability to provide a linear power curve, delivering more power as the engine RPM increases. They are highly efficient at higher speeds and are often favored by racers and high-performance enthusiasts.

On the other hand, positive displacement superchargers offer instant boost and increased torque at lower RPMs. They provide a more immediate and noticeable power increase, making them popular for street applications and daily driving. However, they may not be as efficient at higher RPMs compared to centrifugal superchargers.

Installation and Maintenance

When it comes to installation, centrifugal superchargers are generally easier to fit into the engine bay due to their compact size. They also tend to be lighter, which can be beneficial for overall vehicle weight distribution. Maintenance for centrifugal superchargers is relatively straightforward, with regular inspections and occasional belt replacements.

Positive displacement superchargers, on the other hand, may require more space in the engine bay due to their larger size. They are also heavier, which can affect the vehicle's weight distribution. Maintenance for positive displacement superchargers typically involves regular oil changes and inspections of the interlocking gears or lobes.

Which Supercharger is Right for You?

The choice between a centrifugal and positive displacement supercharger ultimately depends on your specific needs and preferences. If you're looking for maximum power at higher RPMs and don't mind sacrificing some low-end torque, a centrifugal supercharger may be the right choice for you. On the other hand, if you want instant boost and increased torque at lower RPMs for street driving, a positive displacement supercharger may be more suitable.

It's important to consider factors such as your vehicle's intended use, desired power delivery, and available space in the engine bay when making your decision. Consulting with our team of knowledgeable professionals can  provide valuable insights and guidance.

Remember, whether you choose a centrifugal or positive displacement supercharger, both options can significantly enhance the performance of your vehicle. So, get ready to experience the thrill of increased power and take your driving experience to the next level!

Example of torque corves typically found in boosted applications.