How much horsepower do twin turbos add?

A turbocharger is a unique device that boosts the engine’s performance by using physics law to promote airflow. A standard turbocharger includes a compressor wheel and a turbine wheel.

In other words, two propellers are installed on one shaft, with every single fan situated on one shaft end. The engine’s exhaust gas moves to the turbine wheel to rotate the shaft and rotate the other fan with the opposite force. The compressor then comprises air to the engine’s air intake compartment.

The only trick to boosting a car’s horsepower is adding a turbocharger to the vehicle. Turbochargers were previously found in diesel trucks and cars, but currently, turbochargers are placed under the hood.

The device will continue to be in use for many years, even in the future, because of the benefits that turbochargers provide, like improving traction.

A turbocharger can indeed add horsepower to your engine, but do you know how much horsepower can be added? A turbo can boost an engine’s horsepower by thirty to forty percent, about 70 to 150 horsepower. Still, a supercharger directly connected to the engine can raise the horsepower by about 50% to 100%.

How much horsepower do twin turbos add?

It is challenging to give the exact amount of horsepower a turbocharged engine can produce. But regardless of the engine type, a turbocharger can increase the horsepower by 30% – 40 %.

Generally, installing a turbocharger to your car will add about 70 horsepower. However, it can add more horsepower than 70 hp depending on the turbocharger’s size, your vehicle’s model, make, and year.

Installing a turbocharger to the vehicle is complex but after completion of installation. There will be an immediate boost of horsepower by ten to fifty percent and, in some cases, a hp increase of seventy to one-fifty.

So, how much does a twin-turbo add? A twin-turbo can increase hp significantly because of the two identical turbines.

These turbines divide the load on the engines with six-eight or more cylinders. A twin-turbo or bi-turbo can add about 15-25% horsepower to a naturally aspirated engine. Under such a configuration, two turbochargers work handy to provide more horsepower to the one engine.

The impact on the engine power of twin turbos

Twin turbochargers have a lot of impact on the engines.

Positive impacts

1. They improve torque

A twin turbocharger helps the engine improve torque, making a car with the turbocharger drive uphill with ease. Moreover, those cars are capable of pulling with more power.

2. More horsepower

An engine with a turbocharger can produce more power than one without a turbo.

3. Improved fuel economy

A turbocharged engine consumes less fuel because the turbo enhances complete fuel burndown.

4. Improved acceleration even at a low rpm

Turbocharged engines feature a good acceleration at low rpm, giving better driving than a naturally aspirated engine.

Negative impacts

  • A turbocharger has high complexity during its installation and use
  • A turbocharged engine becomes difficult to operate if it has not been fine-tuned

Do twin turbos hurt the engine?

A vehicle with twin turbos records a high-performance flagship. These cars always have their performance boasted like they will have vast potential when turning, superb acceleration, and horsepower. Although the twin turbos will benefit your vehicle, they will have some negative impacts.

For example, twin turbochargers installed in parallel are more useful to upgrade the performance of luxury cars with V-type engines. Each cylinder’s bank is connected with a turbo.

This kind of installation is to help reduce the number of piping needed for the intake and exhaust systems plumbing. This helps reduce turbo lag as well as increase response.

However, parallel-twin turbochargers have features to be smaller than normal single turbos with the same distances. Due to this, there is a small amount of exhaust gas in each turbo in the twin-turbo.

Therefore a smaller turbo has to help keep a quick response. The response’s cost is limited with the return, and the potential booster is enhanced.

However, if you seek higher horsepower, having a parallel twin-turbo will cause weakness in your engine. The twin-turbo leads to latency and increased complexity, and it needs fine-turning.

Can twin turbos be installed on a naturally aspirated engine?

You can theoretically install a twin-turbo on a naturally aspirated engine; however, it is not a plug-and-play method. There is a more sensible consideration in this process that should be done while dealing with the parts. In other words, installing a twin-turbo on a naturally aspirated engine should not be guesswork.


Determining the amount of horsepower that a twin-turbo can add to an engine can be challenging, but generally, A twin-turbo can add about 100 hP to a car’s engine. However, this effectiveness impacts the car’s engine, like latency.

Therefore, if you need to add the car, be ready to make some changes to some parts of the engine. Moreover, be ready to do some upgrading and lose the car’s warranty.

Scroll to Top