What Size Turbocharger Do I Need For a 1947 Engine?

What Size Turbocharger Do I Need For a 1947 Engine?

When it comes to turbochargers, there are many factors to consider. You must consider the size of the engine and the airflow requirements. Efficiency and cost are also considerations. A high-quality turbocharger will boost the engine’s performance and reduce fuel consumption.

Sizing turbochargers

If you want to increase the power of your 1947 engine, you should know how to size your turbocharger. Different manufacturers use different naming conventions for their turbochargers. The sizing of turbochargers will affect the way the wastegate controls the turbo.

A turbo-supercharger works by using the engine’s power to drive an impeller. The impeller forces the exhaust gas against the machine, generating an additional boost. This is challenging because the turbocharger needs unique materials to work effectively. Many of these materials were underdeveloped during World War II, making their production difficult. As a result, turbocharger reliability was often a problem.

A P-47’s turbo-supercharger system was extensive, requiring a large airframe. The P-47 was also huge, with eight x.50 MGs and a rotund body. This system requires a lot of ductwork and growth of the fuselage. It also consumes a lot of space. Nonetheless, the P-47 was fast and perfect for ground attack.

Sizing turbochargers for an a47 engine should be based on the engine’s power output. While a smaller turbocharger will result in increased power, the turbo’s efficiency depends on the machine’s torque. It is also essential to consider turbo lag. While turbo engines are great at producing energy, they are not particularly good at low-end torque. Some applications may require low-end torque.


An important detail to understand when evaluating your turbocharger is the airflow through the engine. To achieve optimum performance, you should match the airflow rate and pressure to the turbo. For example, a 47 turbocharger should produce a constant boost pressure at a constant volume. The compressor cannot operate at its total capacity if it can’t achieve this goal.

The airflow through a turbocharger is the same as that through a car, but the amount is different in every car. Some turbochargers produce a higher boost pressure than others. When they do, it’s referred to as a mild surge. A gentle surge may be caused by a lack of flow reversal or a slight pressure oscillation. In contrast, a deep wave can be caused by a sudden mass flow deterioration, leading to a surge. Regardless of the cause, the reversal in airflow will affect the compressor’s ability to boost the engine.

Another critical factor in optimizing airflow through a turbocharger is the amount of swirling air that enters the compressor. This can affect engine cold start emissions and the turbocharger’s warm-up time. Two-stage systems improve the airflow in a turbocharger by increasing the flow passage volume and the amount of metal surface.

High pressure in the intake system can result in detonation or even physical damage. Because of this, the airflow must be regulated. The turbocharger must rotate at a specific speed to avoid creating high pressure. It must also have a wastegate, which directs the exhaust flow away from the exhaust turbine.


An efficient turbocharger will reduce the vehicle’s fuel consumption by 0.2 percent, saving 700,000 tonnes CO2 and 1.6 million barrels of oil. In addition, it will improve the vehicle’s driveability at low engine speeds. These benefits are significant in emerging markets, where the demand for turbochargers proliferates. For example, 45% of new passenger vehicles in China were turbocharged in 2017, compared to 3.4% in 2009. The global turbocharger market is expected to increase at a rate of 4.2% from 2018 to 25. That means potential savings of millions of tonnes of CO2 per year.

In the P-47, a turbo-supercharger system was used to increase the engine’s boost at high altitudes. The turbocharger generated more gain above 25,000 feet than it did at low altitudes, and the machine did not need as much horsepower to run. Although exhaust gas was lost, a more considerable boost made up for this.

The mechanical efficiency of a turbocharger can be measured by analyzing the bearing systems. The power loss is compared to the unloaded and loaded sides of the thrust bearing. The difference between the two must be added up to get the mechanical efficiency of the turbocharger. This can be calculated using the formula above. In the case of a floating sleeve bearing system, the mechanical efficiency of a turbocharger should be at least 96%.

The compressor section of the turbocharger is where the mechanical energy is converted. It is located in the center hub rotating assembly and is connected to the turbine via a shaft. This shaft is connected to the compressor through a bearing, which allows it to rotate at high speeds with minimal friction. The turbine housing can be water-cooled to protect the lubricating oil.


Adding a turbocharger to your vehicle will cost a good amount of money. Depending on the situation and the car you are installing it on, the cost can range from $500 to $5,000. Choosing a turbocharger that is the right fit for your vehicle and your budget is essential, balancing low prices with high-quality performance.

Turbochargers are costly, but they can significantly improve your vehicle’s performance. Various designs and styles are available on the market, affecting the price. You can also choose to install your turbo, saving you some money. However, if you cannot do it yourself, you should consider hiring a professional. This way, you can save on installation and labor costs.


Before installing a 47 turbocharger, it is essential to know how it operates. Several components will affect its performance. First, you need to understand how the turbocharger controls the turbo rpm. Then, it would help if you understood the function of the wastegates and the hydraulic regulator.

A boost controller should be installed in a secure location. Then, you need to install the programmable ECU. After this, you’ll need to jack up the vehicle at solid lift points. You’ll also need to mount the turbocharger on the engine. Installation is easier if you know the exact specifications of the machine.

The oil feed and drain lines must be clean and free of damage. Ensure that the hoses are just a short distance from the engine or near a heat source. Using a penetrating lubricant before installing a new turbo will protect the hoses from breakage and help ensure a proper connection. You should install a new exhaust manifold gasket as well.

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What Size Turbocharger Do I Need For a 1947 Engine?
What Size Turbocharger Do I Need For a 1947 Engine?
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