Which carburetor to put on Niva 21213 - setup, adjustment, choice

Despite the fact that the VAZ-2121 SUV was developed quite a long time ago, this car is still very popular. In 1994, the model was changed to VAZ-21213. Many people buy these cars because of their high cross-country ability, which can be the envy of some jeeps from famous brands. Others like reliability, unpretentiousness and high maintainability. A simple design and excellent off-road characteristics made this vehicle a vehicle for lovers of travel, hunting, fishing and tourism.

Niva cars 211213 are equipped with a 1.7 liter engine. It is carburetor, and is based on a VAZ-2106 engine. There is also a five-speed manual transmission and a proximity ignition system. The power system is equipped with a Solex 21073 carburetor for the Niva. Many novice car owners are intimidated by carburetors and everything connected with them. But a carburetor is not a death sentence. You just need to understand its basic structure, how to adjust it, and how to repair it.

Float mechanism

The Solex 21073 carburetor, installed on the Niva, has a float chamber of two sections. They are located on both sides of the main cameras of the device. The system consists of two ebonite floats, which are mounted on a lever.

The latter swings on an axis pressed into the bosses of the device cover. There is a tongue on the bracket. The element presses the needle valve needle through a special ball. The float mechanism serves to adjust the level of fuel required for normal operation of the carburetor. The needle valve is a non-separable type. It is not being repaired. The valve body is mounted on a thread in the carburetor cap. The ball protects the needle from shock when the machine moves. If the chamber is empty (for example, if the driver is using LPG), then the floats will knock.

Device

The Solex 21073 carburetor installed on the Niva 1.7 can be classified as an emulsion device.

The mechanism is designed to prepare a working fuel-air mixture. The device consists of two parts - the body and the cover. The device also consists of a float chamber with the ability to balance the level. There is an accelerator pump, an economizer, and an econostat. The design has two fuel chambers and diffusers. A flammable mixture is prepared in them. The lid has fittings through which gasoline is supplied to the carburetor, and excess fuel goes back into the tank. There are also studs in the lid. They are used to mount the air filter. The lid is also equipped with a needle valve for the float chamber, where the fuel level is directly regulated. The carburetor has a mechanical air damper. It allows you to start the engine “cold”. In this modification, the Solex 21073 carburetor on the Niva 21213 shows very high efficiency. When properly configured, the device is capable of providing very high technical performance for front-wheel drive vehicles.

Main dosing systems

The first and second chambers are equipped with diffusers. There is one large and one small element. Spray devices are also made together with small diffusers. The latter are connected through channels to the emulsion wells, and they communicate through one channel with the float chamber. To ensure that gasoline flows in certain portions, the main fuel jets are located below in the emulsion wells. These same wells have special tubes. Each of them is equipped with an air jet at the top. Air is supplied to them from the neck of the device.

Operating principle of the main dosing chamber

Under the influence of vacuum that occurs in the engine cylinders, air is drawn through the filter. Next, oxygen is supplied to the first chamber. It passes through diffusers. Due to the fact that the air flow speed has increased, an even greater vacuum is created in the nozzle area.

Under its action, the fuel rises from the emulsion well from the atomizer. At the same time, air passes through the air nozzle into the emulsion tube and is then mixed with fuel. As a result, an emulsion is formed, which is sucked at high speed into the carburetor channels, where it connects with the air flow. The installed Solex 21073 carburetor on the Niva operates on this principle. Its design may vary depending on the modification. But the principle of operation of the systems is approximately the same for all devices.

Modification results

The main concern that car owners have when tuning is the appearance of excessive fuel consumption. The engine, working with two carburetors, consumes fuel within normal limits, since the increase in power occurs mainly due to a more optimal ratio of fuel to air in each cylinder.

The increase in gasoline consumption occurs only due to a more aggressive driving style, which is observed after an increase in torque and power. Car owners provide maximum fuel supply to the cylinders when starting at traffic lights, since dynamic characteristics, as a result of this modernization, increase by 10-15%.

The reliability of this system is at a high level. Although the presence of additional components increases the risk of breakdown, if installation and adjustment operations are performed correctly, carburetors will not require owner intervention for a long time.

Installing a second carburetor cannot be considered an easy tuning. The car owner should realistically assess his strength before starting modernization. If you take a risk, the result will not take long to arrive. The significant improvement in low-end thrust thanks to the high torque and increased top speed are well worth the effort of installing two carburetors.

Idle system

The device is equipped with an idle system. It is designed to allow the engine to operate at low speeds. At this moment, the vacuum in the diffusers is very small. Fuel cannot enter the main metering system. At idle speed of the engine, fuel is supplied under the throttle valve of the first chamber of the carburetor. There the vacuum is strong enough to form a stable combustible mixture.

Air is supplied through the main jet and the emulsion well of the first chamber. The fuel will then flow to the idle fuel jet. After this, it is mixed with air supplied from the XX air jet. Oxygen is supplied to this element through a special channel. This operating scheme allows the engine to ensure a smooth transition from load to idle and prevents fuel from leaking out of the float chamber.

Troubleshooting

Car components do not last forever, and sometimes the installed Solex 21073 carburetor on the Niva fails. Repairing it must begin with diagnostics. It may be possible to get by with a simple adjustment. So, during operation, solid particles can enter the carburetor, which ultimately causes clogging of the jets. Low-quality gasoline leads to the formation of deposits on the walls of the channels in the device. This significantly reduces their cross section. Failure of carburetor systems can be diagnosed by the following symptoms:

• Increased fuel consumption.
• Difficulties in starting the engine. Reduced power and dynamic performance.
• Unstable operation at idle.

The meaning of replacing a standard unit

The factory equipment of Niva 21213 is a famous headache for owners. It is not bad, but many parts are strongly recommended for replacement. Their combination significantly reduces the possible potential of a domestic SUV. As for the carburetor, it is replaced for the following reasons:

1. Installing a couple of parts. Two carbs are installed by those owners who do not have enough power. This arrangement is quite rare, because the same effect can be achieved by tuning or installing a more advanced carburetor.
2. The second reason for changing the unit is to reduce the normally high fuel consumption. Rare use of an all-terrain vehicle for its intended purpose and city driving provoke excessive fuel consumption without using all the capabilities of the vehicle.

How to restore carburetor operation?

For repairs, most often you have to remove the device from the engine. First, remove the air filter. Then the fuel lines, air pipes, wires and cables are removed. then unscrew the fastening nuts.

It is best to disassemble the carburetor on a table or other convenient surface. The parts should be laid out in some order. This will help you not lose them. The process of adjusting the needle valve is performed using a special template. To wash the device, you must use special liquids. Replacement jets can be purchased at any auto stores. Often, disassembling and flushing the carburetor helps solve a lot of problems.

Adjustment

If the installed Solex 21073 carburetor on the Niva fails, repairs and adjustments help bring the device back to life. The settings allow you to restore optimal modes in which the motor will operate as efficiently as possible. Fuel consumption is at an average level. First of all, start the engine and warm it up a little. Next, you need to remove the fuel hose and the device cover. It is recommended to remove the latter with extreme caution so as not to damage the float. Next, using a measuring tool, measure the distance in each of the carburetor chambers. Measure from the mating surfaces to the edge of the fuel. This size should be approximately 24 mm. If this distance is less or more, then it is adjusted by bending the float. Then you need to start and warm up the engine again. When the level adjustments are successfully completed, you can proceed to adjusting the idle speed.

The engine is turned off. To set up, you will need a flathead screwdriver and a little time. There is a hole on the base of the device in which there is a screw that regulates the quality of the fuel mixture. It is twisted all the way. Then from the extreme position the same screw is unscrewed by about five turns. Then the engine is started. There is no need to use a suction. If you unscrew the “quality” screw, then the carburetor will change the engine speed. Then it is twisted again. It is required to rotate until the operation of the motor is stable and stable. When the engine starts to run smoothly, then the element is unscrewed no more than one turn. As a result, the idle speed will be set at 900. If the engine starts to stall, it is better to slightly increase the idle speed.

Features of the Niva 2121 carburetor

If we are talking about a carburetor, then you need to know that this part is so named because its main functional purpose is carburetion or mixing. Indeed, fuel water and air are mixed in the carburetor. I changed the thermostats to and which thermostat, if you install a thermostat from. In addition, the supply of the acquired consistency to the engine cylinders is regulated.

The carburetion mechanism depends on the design of the carburetor device itself. Which power steering is better to put on gas69? (Page 1. Thus, the “native” carburetor on the Niva 2121 consists of:

• float chamber (
  the best functioning of the idle system and transition systems of all chambers depends of fuel liquid
• jet (the main metering part through which fuel liquid and air enter the carburetor in metered quantities; they are also called nozzles or plugs);
• diffusers (they are narrowings in the carburetor pipes of both chambers, they are necessary to increase the speed of air passage to the mixing chambers);
• throttle valve (mechanical type channel flow regulator, which is intended to configure the amount of fuel liquid
  or gas passing through this channel).

The mechanism for supplying fuel through the carburetor device on the Niva 2121 has the following diagram:

1. From the fuel tank, fuel liquid in a rational amount enters the float chamber.
2. The float chamber lowers under the weight of the fuel water.
3. As fuel water moves, the float chamber rises.
4. the fuel liquid
   passes through the float chamber, it enters the nozzle.
5. From the nozzle, fuel is supplied to the atomizer (it is located in a narrow place in the diffuser).
6. Air enters the carburetor device through the outer pipe.
7. Through the intake manifold, a certain amount of fuel water is supplied via throttle valves directly into the engine.

Advantages and disadvantages

Solex has certain inevitable disadvantages, but there are also positive qualities for which owners of domestic cars love them:

1. High quality build. This includes everything related to materials and the precision of manufacturing of all parts. There is no need to “finish with a file” what is already well done;
2. Better fuel mixing performance. Since the design of the diffusers is much better thought out than in OZONE carburetors, with proper tuning you can achieve better power output with lower fuel consumption;
3. The ability to modify and adjust the carburetor, achieving optimal operating parameters;
4. Maintainability and low cost of spare parts. Compared to modern injection engines, repairing a Solex carburetor is much easier and cheaper;

Well, the main drawback is sensitivity to blockages, which is inevitable for any precisely fitted device. The dirt comes from gasoline, which, as we know, is not of the highest quality. And dust can be pumped from the air bypassing the air filter if there is deformation and cracks in the housing, as well as through holes in the float chamber.

Today you can hear that carburetor cars are a thing of the past. This is partly true, because new standards, including environmental ones, and progress have long dictated a new perception of convenience and comfort. Injectors operate more economically, adapt more accurately to external conditions, and meet new requirements.

How long will the Solex carburetor remain relevant? Given its reliability and convenience, cars with this fuel supply system will be in use for a long time. So far, the interest in servicing and repairing the Solex has not waned, since there are quite a lot of cars with it.

Design features of the Solex carburetor for Niva 2121

For SUV Niva 2121

The carburetor device of the Solex model with serial number 21073-110-7010 is perfect. According to reviews from experienced auto mechanics, the carburetor of this model has the highest level of reliability because it is easy to adjust. Which carburetor is better to put on which carburetor version of the VAZ-2121 and became. Let's look at its features:

• emulsion type;
• two-section float chamber, in which sections are connected to each other;
• two chambers equipped with throttle valves and dosing systems;
• transition systems for both cameras;
• An idle system is provided for the first chamber.

The Solex device is divided into two halves - lower and upper. The lower one includes the carburetor body, and the upper one includes its cover. The lower parts of each half have mechanically operated butterfly valves. VAZ 2101 carburetor parameters, which one to install, is it possible. And in the upper part there is another damper for air supply. It starts to work using a special cable connected to the vacuum starting system.

Solex is convenient in that a small set of tools is useful for its adjustment, so it can be done in virtually all conditions.

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Which Carburetor to Put on a VAZ 2121

Which carburetor

better
put it on Levels 2121

Niva 2121 , or VAZ-2121 is considered a small-class SUV, which has a supporting body and permanent all-wheel drive. The first model of this car had an engine with the same markings. VAZ-2121. I entered his package and the Daaz 2107-20 or “seven by twenty” carburetor If this doesn't work, is it best to use a Niva 2121 carburetor from modern models?

Design features of the Ozone carburetor for Niva 2121

The Ozone carburetor device, suitable for the Niva 2121 SUV, can be of 2 types:

1. With serial number 2107-110-7010-10, it is distinguished by the fact that this carburetor:
2. equipped with an old standard breaker;
3. not equipped with a vacuum corrector.
4. With serial number 2107-110-7010-20, the difference is that this device:
5. does not have a microswitch from the economizer (it affects fuel water consumption and environmental friendliness of emissions).

Common features of the Ozone design of both models include:

1. Strong, powerful body (thanks to this, the carburetor device is virtually not deformed).
2. Fuel jets with a huge diameter (this implies the introduction of Ozone for low quality fuel water).
3. The idle system is equipped with an electric shut-off valve.
4. The 2nd chamber with the throttle valve is pneumatically driven.
5. Diaphragm trigger.
6. The mechanical control system is equipped with a cable drive, which leads to the air damper of the first chamber.
7. Accelerator pump with ball valves.

Although the absence of an economizer with massive modes in it reduces the dynamic properties of the vehicle and does not save fuel consumption.

Which carburetor to install on Niva 21213

Initially, when the VAZ 21213 model was designed and produced by the manufacturer, an Ozone brand carburetor was installed in it. In 1994, the manufacturer decided to modernize the Niva. In addition to the engine and other parts, the carburetor was replaced with a Solex model. Car owners still argue about which unit is better. The opinions of Niva owners differed and, indeed, there are a lot of “pros” and a lot of “cons” regarding each type of carburetor. We will also try to figure out which model of the unit is better.

Ozone has an old type breaker installed, and there is no vacuum corrector. The Solex does not have a microswitch installed on the economizer, which negatively affects the cleanliness of the exhaust and fuel consumption. Both types of carburetor have both their pros and cons. But VAZ engineers preferred Solex as a more modern model. However, many car owners often complain about this type of carburetor because of its incorrect operation. Experts believe that the reason for this may be the low quality of gasoline. Also, the reason sometimes lies in the need to replace the fuel or air filter; in addition, for proper operation of the carburetor, it and the entire ventilation system must be regularly cleaned of oil contaminants. Some drivers of Niva, where Ozone is installed, independently change the carburetor to Solex. According to the majority, this has a positive effect on the performance of their car.

A little history

A new carburetor was needed when the front-wheel drive VAZ project was being developed. The transverse arrangement of the engine did not make it possible to install the old OZONE carburetor, which was used for the “classic”. But the development of the French company Solex, after a little “finishing with a file,” went off without a hitch.

The design of Solex carburetors made it possible to install them on engines of different types and power, slightly changing some parameters. So, the most common was the Solex model 21083, which was installed on a 1.5 liter engine. VAZ 2108, 2109. For “classics” with a 1.45-1.6 liter engine. modification 21053 was developed, structurally similar to Solex 21073, designed for the VAZ 21213 Niva with a powerful 1.7 liter engine. And even for Moskvich with a 1.5 liter engine. Solex 21041 was installed, and for 1.8 liters. – modification 21041-10, suitable for both Volga and UAZ.