How Much Horsepower Does a Supercharger Add

How Much Horsepower Does a Supercharger Add? (Cost and Engine Damage)

A supercharger is one of the most popular methods for increasing an internal combustion engine’s horsepower. However, what precisely is a supercharger and how much power can you anticipate from one? In this article, we’ll examine superchargers in more detail, including their operation, potential horsepower gains, installation costs, and risk of engine damage.

To produce power, an internal combustion engine needs a combination of fuel and air. By forcing more air into the engine, a supercharger increases the amount of fuel that can be burned. As a result, horsepower and torque are significantly increased.

A supercharger’s function is to increase the amount of air that is available to the engine, which then enables the engine to burn more fuel and produce more power. However, this additional power has a price, both financially and in terms of the potential for engine damage.

How Superchargers Work

Positive displacement and dynamic compressors are the two main categories of superchargers. Roots and twin-screw positive displacement superchargers work by trapping a fixed volume of air in a chamber and then forcing it into the engine. Dynamic compressors, like centrifugal superchargers, force compressed air into the engine by spinning an impeller.

Typically, a supercharger is driven by the crankshaft of the engine using a belt-drive system. The incoming air is compressed by the supercharger, which raises its temperature and density. The engine’s intake manifold receives the compressed air after which it is directed there to mix with the fuel before being burned in the combustion chamber.

The Power Boost from a Supercharger

The Power Boost from a Supercharger

A supercharger’s ability to increase an engine’s horsepower will depend on a number of variables, including the supercharger’s size and design, the engine’s displacement, and the engine’s tuning. However, superchargers can generally increase an engine’s horsepower by up to 50%. Even more, horsepower can be attained by expanding the supercharger, improving the engine’s internals, or raising the boost pressure.

In practice, adding a supercharger to a V8 engine can increase its output from 400 horsepower at the factory to 600 horsepower. A four-cylinder engine can increase its horsepower by 100, going from 200 to 300. It’s important to note that these are only approximations, and actual gains will vary depending on the particular engine and supercharger setup.

Superchargers typically deliver power more quickly and at lower RPMs than other performance upgrades like turbocharging. Superchargers, however, can use more energy and generate more heat, which could harm the engine. Additionally, turbochargers are frequently more effective, which results in less heat being produced and less power being used.

Cost of Installing a Supercharger

Supercharger installation can be expensive. Positive displacement superchargers typically cost more than dynamic compressors; the price of the supercharger itself will depend on the type and size. Costs for labor and tuning during installation will also be incurred. The total price of a supercharger upgrade frequently exceeds $10,000.

The extra horsepower and performance improvements, however, might be worthwhile for some car enthusiasts. It’s also possible to see a sizable return on investment in terms of improved performance and resale value with a well-installed and properly tuned supercharger. It’s crucial to carefully weigh the costs and advantages of installing a supercharger, as well as whether the upgrade is consistent with your goals for the car.

Engine Damage from Superchargers

Engine Damage from Superchargers

The risk of engine damage is one of the main issues with installing a supercharger. Connecting rods and pistons may experience stress due to the increased airflow and boost pressure, among other engine parts. It’s crucial to select a high-quality supercharger that is appropriately sized for the engine and to have it installed by a reputable and skilled mechanic in order to reduce the risk of engine damage.

Upgrading the engine’s internals with stronger and more resilient components, such as pistons and rods, can help prevent engine damage. In order to prevent running too much boost, which can result in the engine detonating, it’s also critical to properly tune the engine management system. An engine’s wear and tear can be accelerated by supercharging, necessitating more frequent maintenance to keep it in good shape.

Supercharging is typically regarded as being harder on the engine than other performance upgrades like turbocharging. However, it’s important to keep in mind that every performance improvement poses some level of risk to the engine, so it’s crucial to weigh your options before deciding. In order to confirm that the supercharger upgrade does not void the warranty or raise the insurance deductible, it’s also crucial to review the vehicle insurance and warranty.


An internal combustion engine’s horsepower and performance can be greatly improved by installing a supercharger. Before making a choice, it’s crucial to weigh the costs, the risk of engine damage, and any potential warranty and insurance repercussions.

Significant increases in horsepower and torque are possible with the right supercharger and engine pairing. The secret is to have reasonable expectations and to spend money on a high-quality supercharger that is installed and sized correctly for your engine.