The fuel pump on the carb: features, installation

Carburetor – one of the nodes of the power supply system of the engine. It is designed for making optimum combustible mixture of fuel and air. In the carburetor the gasoline is mixed with air. Also, this element regulates the amount of feed of the mixture in the combustion chamber. Carbs are still very popular and used not only in the classical models of AVTOVAZ, but also on some cars.

Characteristics

Invented the carburetor for a long time. These devices are mass produced in the 20th century. However, technological progress does not stand still, and instead, the carb came injector power supply system. Carburetor – this is a rather old mechanism. Work it is often supported by mechanical devices. Action fuel injection system is electronically regulated. Many owners of gasoline cars come to combine mechanical carburetor with modern devices. One example of this synthesis is the fuel pump mounted on the carburetor.

Fuel Pump: principal

This device, as the name implies, designed to supply the liquid gasoline from the tank straight to the combustion chambers of the engine. The main objective of any pump – pumping of fluid under the necessary pressure level, which is necessary to ensure that the motor worked consistently. Modern technology is slowly but surely taking over the world. Innovations have come in the automotive industry, but on carbureted engines still use mechanical pumps. A mechanical device was created exclusively to work with the carb. But an electric fuel pump designed for fuel injection engines. A mechanical element is installed most often on the outside of the tank, but electric can be found inside it. It is submersible. The fuel pump on the carb – not the fruit of modern technology. It's finding the drivers themselves. The fact that the electric pump increases the efficiency of the carburetor and engine in General.

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Functionality of the electric element with a carburetor

The electric fuel pump according to the principle of operation is very similar to the mechanical device. The Main item task – to ensure the supply of gasoline from the tank and then feed it into the cylinders. I must say that with carburetors and electric pumps operate at low pressure, in contrast to the injector. Here, the fuel system should be higher pressure. In addition, on fuel injected engines an electric fuel pump installed directly inside the gas tank. In the case of the carburetor, it will be located next to it under the hood. Therefore, the system and operates at lower pressures. But for this installation you must have specialized equipment that can only be done on the SRT. And if the owner wants to install an electric fuel pump with your hands, then it is better to introduce the device into the tank.

Design fuel pump

The device on the device and principle of operation is very similar to a mechanical device. The work is carried out through the core. It retracts by means of an electromagnetic valve. The low-pressure fuel pump consists of a working chamber, valve – the inlet and outlet, the diaphragm return spring, the electromagnetic sensor, the core and the contact group.

The Algorithm

The Device works due to the movements of the diaphragm. It moves up and down. The result above the diaphragm there is a vacuum in the downward and opens the inlet valve. Through it, the fuel flows into the recess in the diaphragm, previously passed through the filter. When it moves up, it creates a certain pressure, and the inlet valve closes. Then open the exhaust, and the fuel then moves through the fuel system. Now the carburetor system of the engine were massively equipped with electric pumps. This is easily explained by the many advantages which are not present in the mechanical device.

Carb Tuning: installing an electric fuel pump

Do Not think that given the simplicity of the item, assembling it in a different system of power is simple. The installation of the electric fuel pump is a fairly complex process. But the result is worth the investment of effort. The first thing you need to determine what pump will fit to the carb and to the power supply system. Also for mounting, you will need different supplies.

Required materials

To install an electric pump, you will need a hose. Its Length shall be not less than 5 metres and inner diameter – 8-9 mm. Also purchased an external low pressure fuel pump and relay to him. Of the tools you need to find a drill with a diameter of 3-4 mm. Additionally buy the filter from the fuel injection system of the engine, and the carburetor filter. Also need a tube of steel with a wall thickness of 0.8 millimeters and a diameter of 7 millimeters. Pipe length should be at least 250 mm. Also need a hose of 12 mm and a transition fitting for hosefrom 8 to 12 mm.

Assembly work

First remove the fuel level sensor – he is in the tank. In the inside of the cover drill a hole and soldering iron soldered the tube about 7 mm. the End of this tube must be folded – in order to run a drain back line. Bending should be so that one end of the tube is located at a greater distance than the pipe of a fence of fuel. The upper part also bends to parallel with the hole of a fence of fuel. Next, mount a modern sensor fuel levels. It is worth noting that it has a intake and return line. It is set in the tank. Important: the rubber tube should be connected to the fitting “return” from the fuel system. Then the end of the prepared hose is connected to the nozzle of the standpipe. Further, the elements are fixed to a metal tube with clamps. The electric fuel pump low pressure installed in a horizontal position to the motor shield using a special bracket through cushions of rubber. They are included with the device. It is very important to ask the device the correct position where the suction will occur from the surge tank and the pressure of the flow is directed in the direction of the motor. Then the fuel hose is attached to the filter from the injector.

On the second fitting wear a tube diameter of 5 mm. It with clamps secured to the body in a vertical position. It is necessary that the fuel mixture was applied correctly, that is, from the bottom up. A pump connected to the tank through a 12 mm hose and adapter. Next is to engage in high pressure. In the carburetor it does not need. To lower it, pump remove the cover, Unscrew the fitting and remove the flow grid. In fitting return line rassverlivajut hole to 3 mm. Then it only remains to connect the fuel pump to the carb with an ordinary fuel filter. It's easy to do. Only need the hose clamps and hose. To connect the device to the 12 volt terminal on the ignition coil through a relay.

The Advantages of electric fuel pump with a carburetor

There are many reasons why installing a fuel pump on the carb. One of the serious advantages – is how the engine is started. Now the motor will run quickly, almost instantly. The pump is activated as soon as the driver turns the key in the ignition. Significantly reduced noise operation. Electric pump almost no noise. The salon no longer smell of gasoline as before. And finally, the main plus – the ability to reduce fuel consumption by a small percentage.

Conclusion

As you can see, this is a useful improvement. Setting the fuel pump to the carburetor Mercedes or any other car, you will not face disadvantages. The only challenge – select an appropriate device and installation work.