Adjusting the carburetor "Solex 21083". Carburetor "Solex 21083": device, adjustment and tuning

2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:42

In the article you will learn how the Solex 21083 carburetor is adjusted. You can do this work yourself quite quickly. Unless, of course, you are not going to improve (tuning) the fuel injection system. It is worth noting that the carburetor is the basis of the power system, it is with its help that the correct mixture formation is carried out for subsequent supply to the engine cylinders. And the technical condition of the entire car depends on how correctly this device works. As for the 21083 carburetors, these are very reliable devices that can serve without adjustments for a long time. Provided that their mode of operation is close to ideal.

Basic information

Solex carburetors are different, but in fact the basic design is installed on the VAZ-21083. It uses the minimum sections of the diffusers. It is worth noting that such carburetors can only be used on vehicles whose volume is not more thanone and a half liters. It should also be noted that this carburetor can be installed not only on the VAZ-2108 engine and the like, but also on the engines of cars of the "classic" series. The Solex 21083 carburetor is installed on them without any problems. The diagram of this device is given in the article.

Solex as a tuning item

There is a very large playground for fantasy if you are going to tune the injection system. You can bore the carburetor to a different diameter of the diffusers. As for installation on engines with a volume of more than one and a half liters, this is not recommended, since at a high crankshaft speed it is not able to work normally. And adjusting the Solex 21083 carburetor will not help, since it is not designed for engines with a large volume. It should also be noted that the figure eight carburetor makes a lean mixture. Therefore, when installing on other motors, you will need to select jets, as well as replace them.

Start adjustments

Please note that setting up the Solex 21083 carburetor begins with adjusting the minimum level in the float chamber. To carry out this procedure correctly, you will need a special template. The position of the floats must be at a certain distance from the cover. After that, you can start setting the idle speed. To do this, completely tighten the screw that regulates the quality of the mixture. Then unscrew it five or six turns. After that, it is necessary to unscrew the screw that regulates the amount of the mixture, achieving the disappearancevacuum in the tube connecting the carburetor and the ignition distributor. Next, you need to sharply press the gas pedal to check whether the engine can work in transient conditions if the Solex 21083 carburetor is configured this way. A diagram of the elements and nodes of this device is given in the article.

Idling setting

Then look at the tachometer. It should be about 800 rpm. If more, then it is necessary to reduce the speed with the quantity screw by unscrewing it. In the same case, if the speed is below 800 rpm, it is necessary to tighten the high-quality mixture screw until the engine normalizes its operation. But this is not the end of the Solex 21083 carburetor adjustment. Your task is to maximize the depletion of the working air-fuel mixture. Please note that when the screw is screwed in, the mixture becomes lean. Therefore, this is reflected in the CO2 level. Now you need to achieve normal speed with the quantity screw. If we are talking about the warm mode of the year, then it should be set in the range of 800-900 rpm. In winter, it is better to increase this value by about 100 rpm.

Selection and installation of jets

That's all, the tuning of the Solex 21083 carburetor is completed, now we can talk about another important point. For the VAZ-2108 carburetor, you need to choose jets, and be sure to take into account the engine size. The higher this figure, the smaller the jets should be. And the reason for this is that with a larger volume, an increase in air occurs,passing through the diffuser. Consequently, this leaves its mark on the consumption of gasoline. To select the correct jets on the Solex carburetor, you must adhere to a certain algorithm.

First of all, it is recommended to select gasoline jets. Only after them it is necessary to make a selection of air. And first of all, a selection of these devices is carried out for the primary chamber, after - for the secondary. Please note that the jets must not be cleaned with metal objects. Otherwise, they will become useless. If you decide to install a new Solex 21083 carburetor (its price is about 3,000 rubles), be sure to adjust it using special equipment.

Carburetor improvements

Very often, carburetors are tuned, which ends with an increase in the efficiency of this mechanism. In particular, very often motorists remove the electric drive for idling. Of course, in this case, there is an increase in gasoline consumption by about 5 percent. But the overall performance of the engine increases. It may also help to install a needle valve of a different design and select the level of gasoline in the float chamber. This can reduce the chance of the air-fuel mixture being too lean in boost mode. And also the use of a needle valve made of rubber allows you to keep the level of gasoline as stable as possible. You can also replace the Solex 21083 carburetor jets, thiswill increase power. True, gasoline consumption will also rise.

More serious improvements

In the carburetors of VAZ cars, the throttle is often "cut". To do this, it is necessary to make holes in the throttle valve, the diameter of which is somewhat smaller than it was originally. This significantly reduces the level of CO2 in the exhaust gases. But, on the other hand, while idling, the CO2 level remains the same, because the Solex 21083 carburetor works in the default mode. Its device only becomes such that the mixture is distributed more evenly. And you get gas savings, even if insignificant. The maximum you can achieve is a two percent reduction in gasoline consumption. After polishing the diffusers, it is realistic to achieve a reduction in aerodynamic losses. Of course, in order to achieve maximum effect, it is necessary to polish them almost to a mirror. These are improvements that will improve the design of the Solex carburetor. On the other hand, this element of the power system works very stably, even without tuning it functions perfectly. True, sometimes the Solex 21083 carburetor needs to be adjusted.

Conclusion

In conclusion, I would like to summarize everything that has been said above. On cars, it is desirable to keep the fuel system and air supply clean. To do this, it turns out to be sufficient to change the filters of gasoline and air in a timely manner. It should also be noted that excessive engine wear -this is an increase in the likelihood that soot will begin to penetrate into the carburetor chambers through the breather. If the engine on your car needs repair, do it. If it is not possible to do this, disconnect the breather pipe from the air filter housing. Direct it under the crankcase so that the gases do not go into the fuel supply system. But still, do not delay with the overhaul. In its process, it is imperative to carry out repairs and troubleshooting of all attachments. Do not change Solex 21083 carburetor jets for tuned ones if the engine is running at its last breath.