The desire for racing superiority has driven automakers to seek ways to improve the performance of a standard internal combustion engine without drastic design interventions. And the most effective solution was to introduce an additional air blower, due to which a larger volume enters the cylinders and increases the efficiency of the unit.
Those who have driven a car with a turbine engine at least once in their life have noticed that until the engine turns at a certain speed, the dynamics of such a car is limited. But as soon as the turbo starts to work, the reaction of the engine increases. The inertia of these installations led the engineers to think about creating another modification of the turbines. Turbocharging began to be used to reduce fuel consumption, but at the same time to increase the performance of the internal combustion engine. As a further evolution of the turbo for engines, the system appeared Twin Turbo.
How much does it cost to install a Twin Turbo?
The installation price of twin-turbo It is influenced by many factors, but mainly by the make and model of the vehicle. Also, prices are lower for used turbos, while special requests will result in a higher price. However, prices range from €1,100 and €10,500taking into account that labor prices range between €95 and €125 per hour.
In the table below you will find the price estimates for the installation of twin turbo for different types of cars.
|Car type||Average Twin Turbo Installation Price|
As can be clearly seen, the prices depend on the type of car. That’s why it’s recommended to get price quotes from a group of mechanics before making an appointment.
Twin Turbo Installation Details
Turbocharged engines have become standard engines for modern cars. Both diesel and gasoline engines are turbocharged. The turbocharger is a device that allows both the increase in the specific power of thermal engines and the reduction of consumption and polluting emissions.
The twin-turbo system is a sequential supercharging system, which is equipped with two turbochargers, one larger and one smaller. The small one works at lower speeds and the big one works at higher speeds, so the lag is much less and the peak power is higher. The circuit between the two turbochargers is separated by a valve. This type of supercharger uses turbochargers in parallel and is usually fitted to engines with cylinders in v but also in those with a greater number of cylinders in line (6 cylinder, BMW).
The time it takes to install a twin depends on the mechanic’s experience, the number of people working on it, and whether or not the mechanics take any breaks. If there will be no breaks, the entire process should be done in five to ten hours.
This job requires a lot of critical work and precision as additional pipes and cables were also installed to keep things running smoothly.
Twin Turbo operating principle
The principle of operation of the supercharger for twin-turbo engines is the same as that of a single turbocharged engine. In the case of an engine V 12 cylindera turbocharger unit is used to power a bank of 6 cylinders. The advantages of using this supercharging solution, compared to the single turbocharger solution, are multiple: the length of the intake circuit ducts decreases, the turbochargers have less geometry, mass and inertia and therefore the response to acceleration is faster .
BMW it also uses biturbo technology in 6-cylinder in-line engines. Therefore, a turbocharger supplies 3 cylinders of the compressed air motor. The advantages are the same, the turbochargers are smaller and the air intake circuit is simplified, improving response to acceleration.
Types of Twin Turbo
In most cases, a twin turbocharger parallel type is used in engines with a V-shaped cylinder body design. The device of such a system is as follows: one turbine is required for each section of the cylinder. They have the same dimensions and also run parallel to each other. Exhaust gases are evenly distributed in the exhaust tract and go to each turbocharger in equal amounts. These mechanisms work in the same way as an in-line turbine engine. The only difference is that this type of turbo has two identical superchargers, but the air in each of them is not distributed by sections but is constantly injected into the common passage of the intake system.
Twin turbo engines use two sets of turbochargers to compress air in two stages. These motors are also called motors with Sequential turbochargers (standard) Because the compressed air entering the cylinders passes through the two compressors and is compressed twice.
The twin-scroll turbo system addresses many of the shortcomings of single-scroll turbo systems by separating cylinders whose exhaust gas pulses interfere with each other. As a concept, similar to the cylinder array in the case of naturally aspirated engines, twin-scrolling groups the cylinders on one side of the turbine intake chamber so that the kinetic energy resulting from fuel combustion is captured from within. more efficiently by the turbine.
There are engines called Quad turbochargers that use 4 groups of turbochargers. An example of this is the engine that equips the Bugatti EB110, 3.5 liter, with 12 cylinders in V. This motor drives 4 turbo compressors in parallel, two on each bank of 6 cylinders.
Twin turbo vs twin turbo
Drivers easily confuse systems Twin-Turbo and Bi-Turbo.
The parallel supercharging system uses two turbochargers of the same size, identical in all respects. In this system each turbine has its part of cylinders, for example in a motor V8each turbine will be driven by exhaust gases from 4 cylinders. This system is called BiTurbo when the turbines are identical.
This is the main difference: the Twin-Turbo system uses two turbines of different sizes, and the BiTurbo system also uses two turbines but of the same size. Be careful because the great Bavarian company BMW uses the name TwinPower Turbo and many confuse it with Twin-Turbo.
The German term Twin Power Turbo It has also been applied to simple turbocharged engines with two exhaust outlets to the turbine. These are called twin scroll and they help the turbocharger to move much more easily, even if the speed ranges are different.
As presented before, the Twin-Turbo is more elastic and develops power more linearly and in a higher speed range, while the system BiTurbo develops a higher maximum power, but at the same time, the power is available only after 2500rpm. At this speed the engine develops power, but not as much, it will be lazier until the turbines start to press. Maintenance on cars equipped with this system is a little higher because more oil enters the entire installation, but it is not such a big difference.
Important things to consider
Installing a twin turbo will help you save on €210 To over €2,000 per year only in gasoline prices.
The life of a twin turbo is limited and must be replaced every 100,000 to 150,000 miles.
The advantages of this supercharging system are obvious: at low speeds, the high-pressure turbocharger group is used because it has smaller dimensions and implicitly less inertia (quicker response to accelerations); As engine speed increases, the larger low pressure turbocharger unit compresses the air to maximum boost pressure.
When looking for the right type of twin-turbo for your car, you need to consider your needs. For example, parallel-twin turbos are the right choice for a basic twin-turbo setup, while sequential-twin turbos are recommended for those who want less lag and higher boost pressure. Also, if you have a diesel engine, staged turbocharging is best and twin-scroll turbos give the power of a six-cylinder engine to the four-cylinder engine.
It is not recommended to install the twin turbo yourself, as it is a very complex job and requires a lot of attention. Therefore, you should let a mechanic do this job.