Today on the roads you can often find cars that are 20 or even 30 years old. These are mainly classic VAZ models. The owners of these old cars do their best to keep them alive and strive for optimal performance. The owners of old Zhiguli cars want to improve the dynamics of the car and reduce fuel consumption. This can be done, but it all depends on the carburetor. Let's look at which carburetor is better to install on the VAZ-2106 to get the result. This task is quite feasible, despite the fact that the driver can replace the device and adjust it independently. If you look at the reviews of drivers who replaced the standard carburetor, the effect is quite noticeable.
A brief history of carburetors for VAZ
On the first classic VAZ models, which were an improved Italian Fiat, devices manufactured by the Dmitrov Automotive Aggregate Plant were installed in the power supply system in conjunction with the motors. For the production of these carburetors, a license was purchased from the French. These mechanisms were assigned the index DAAZ-2106 for the VAZ “Six” model.
Until now, such carburetors are popularly called “DAAZ” and “Weber”. Many car owners still actively use them. The use of these mechanisms gives good dynamic characteristics. These carburetors have a simple design without unnecessary design features. But “Webers” have one very significant drawback - they have huge appetites. These models have not been produced for a long time, since along with the VAZ-2105 model, all other Zhigulis were equipped with Ozon products. Below we will talk about it in more detail.
Reasons for tuning
Two carburetors instead of one is a fairly effective tuning that has sound reasons. It’s even surprising why engineers didn’t think of this before at the stage of development of the VAZ 2109 model. One of the main reasons that contributed to the emergence of such a modernization is a design error in the power unit, as a result of which the manifold pipes have different lengths. This opinion is shared by many tuner experts. This difference has led to the fact that the largest amount of fuel falls on the first and fourth cylinders, while the rest do not receive enough fuel.
"Ozone" and its problems
Sometimes the pneumatic drive of the damper on the secondary chamber refuses to work normally.
Troubles also arise with a worn out diaphragm in the forced idle economizer system. If for some reason dirt gets into the mechanism or the adjustments are broken, then the second chamber may not open at all, or it may open, but with a serious delay. This leads to a significant decrease in dynamics. Power is lost, the maximum speed of the car decreases, the engine is unstable at high and medium speeds. Despite all this, the DAAZ-1107010 “Ozone” carburetor produces good dynamic characteristics with a fuel consumption of about seven liters per 100 kilometers. Naturally, the device must be constantly monitored and maintained. To avoid contaminating the internal chambers, it is recommended to periodically clean them. A special carburetor cleaner is used. This chemical is sold in aerosol cans.
"Solex"
These mechanisms are no less popular. DAAZ-21053 is especially popular. It is also manufactured under license. This carburetor has good dynamic characteristics and is also economical. This is a good solution if you need a carburetor for the “Six”. The design of the Solex is fundamentally different from all previous devices from the Dmitrov Automotive Unit, equipped with a fuel return supply system.
With this solution, gasoline can be returned to the car's gas tank. By using a reverse fuel supply system, it is possible to save up to 400-800 grams of fuel per hundred kilometers. Some versions of Solex can be supplemented with auxiliary electronic systems. Among them is an idle system with the ability to adjust using an electric valve. Also found on export models. In the CIS countries, a model with an electric idle air valve was widespread. This two-chamber carburetor turned out to be quite difficult to operate.
The channels are made narrow and often clogged. If the device is not maintained, then the idle system begins to malfunction first, and then all other components. In terms of fuel consumption, the Solex on the VAZ-2106 consumed from 6 to 10 liters when driving in quiet mode. In terms of dynamic characteristics, the unit is second only to the early Weber. If you do preventive carburetor repairs in a timely manner, Solex will not cause any special problems.
Troubleshooting
Malfunctions of the water pump on front-wheel drive VAZ models manifest themselves as follows.
- Extraneous noise appears on the right side of the engine, increasing with increasing speed.
- Traces of coolant (not to be confused with engine oil) form near and under the timing belt assembly.
- A puddle appears under the car, and the level of antifreeze in the expansion tank drops noticeably.
- The electric cooling radiator fan turns on more often than usual in any weather.
The protective cover is attached to the engine with three bolts
It is quite difficult to clearly identify the sound of worn water pump bearings against the background of a running engine. The problem is compounded by noise from other faulty components, such as knocking valves. Therefore, at the first suspicion, you should remove the plastic timing case by unscrewing three bolts with a 10mm wrench and diagnose the pump as follows.
- Carefully inspect the area around the water pump gear and timing belt for traces of coolant.
Traces of coolant under the pump indicate an antifreeze leak
After complete wear of the bearing, the pump shaft may become distorted.
These symptoms can appear individually or simultaneously. You can detect oil seal wear when the bearings are working (there are traces of antifreeze, but there is no shaft play), and vice versa. In any case, the pump should be removed and, if necessary, disassembled or replaced.
How to choose a carburetor and what to install on a VAZ-2106?
Those who like to make improvements to classic models from AvtoVAZ and simply owners who want to improve the performance characteristics of the car most often choose Solex. Models used are DAAZ-21083. Installing them on classic models is impossible without significant modifications.
When thinking about which carburetor is best to install on a VAZ-2106, you need to take into account the engine size. For 1.3-liter units, the DAAZ-2018 option is perfect. For engines with a volume of 1.6 liters, the best choice is DAAZ-21083. The differences between these two models are in the cross-sectional diameter of the diffusers, as well as in the sizes of the fuel and air jets. If you install this carburetor as it is, then at speeds close to 4 thousand, the air emission speed can reach supersonic, which is not acceptable. But this will not affect acceleration in any way. It is necessary to enlarge the diffusers on the first and second chambers and install other jets. After this, fuel consumption will be the same as on 21053, and the dynamics will be better than on 21073. For VAZ-2106 cars, the price of such a carburetor will be about five thousand rubles.
Increasing the power of the “classics”
The VAZ 2106 carburetor modernization scheme includes several stages. At the initial stage, they increase the level of engine dynamics by removing the spring from the air damper drive. After this, you need to be prepared for a slight increase in fuel consumption. Next, the vacuum lever of the throttle valve is made mechanical. Take a steel wire and round it at one end.
The lever is placed under the drive fastening nut. In this case, the place where the outer lever protrudes should be between the wire and the second lever. After this, the nut is tightened tightly. The next step will be replacing the small diffuser. It is located in the main diffuser above the air valve. For replacement, an element with a marking value of “4.5” is selected instead of a diffuser marked “3.5”. The nozzle on the accelerator pump is also replaced here.
Select a sprayer with a different marking value - “40”. After this comes the stage of increasing the jets. As a result, we must keep in mind that fuel consumption will increase. First, they are upgrading the primary compartment. Here they put a fuel type jet, marked as “125”, and an air jet, with a marking value of “150”. After the operations have been completed, you can conduct a rehearsal of starting the car. Acceleration and power should increase.
This is interesting: Selection of spark plugs by car make
If this happens, then you can change the jets in the secondary compartment, selecting the marking “162” for fuel, “190” for air. To tune a carburetor, you must have not only technical knowledge and relevant skills, but also common sense. What is better: tuning the VAZ carburetor, replacing it? Or maybe we should leave everything as it is? In each specific case, you need to decide on the situation, based on your own experience, financial capabilities and necessity.
The result of tuning or replacing the carburetor will not be long in coming: the power and dynamic qualities of the car will increase. But at the same time, the consumption of fuel and lubricants and the toxicity of emissions will increase. That is why the issue must be approached responsibly and seriously.
Features of the installation DAAZ-2108, -21083
To install any of these models on the “Classic”, it is necessary to prepare a new set of gaskets, hoses for the carburetor heating system, a tee for connecting to the fuel system, a valve and rods for the accelerator. To get the maximum result from this procedure, it is advisable to replace the ignition. It is better to install a more technologically advanced, electronic one. Contact ignition is a thing of the past. The system is very unreliable and often causes operational problems. The installation of contactless electronic ignition is one of the most useful improvements for domestic VAZs, in particular for the Six.
How to change the gasket
Over the years, gaskets made from a wide variety of materials were installed on DAAZ: heat-resistant cardboard, paronite, metal. The main function of the gasket is to create the most reliable and tight connection between the carburetor body and the surface of the engine intake manifold. This is the only way to ensure normal operation of the power unit.
After dismantling the carburetor, it is necessary to inspect the gasket for deformations, tears or severe dents. The manufacturer recommends changing the seal after each carburetor removal.
On the left - new, in the center - when dismantling the carburetor for the first time, on the right - after 3 years of operation of the car
The gasket is selected according to the type of the old one. You cannot install a gasket made of a different material or with a change in shape - it will not be able to provide an adequate joint between the parts of the mechanisms.
The gasket replacement procedure is not difficult:
- A new gasket is placed on the carburetor mounting studs.
Before this, you need to clean the planting site from soot and dirt.
It is necessary to install the gasket in the same position as the old one.
Then install the carburetor on it and tighten the fixing nuts until they stop.
Other options
But don’t think that this is all that is suitable for “Classics”. If you think about which carburetor is better to install on a VAZ-2106, then you also remember the Solex-21073. It is designed for 1.7 liter engines - from 21053 it is distinguished by larger channels and enlarged jets.
After installing it, you can get even more dynamics, and the fuel consumption will be 9-12 liters. And if you are not afraid of the consumption and rare preventative repairs of the Solex carburetor, then you can opt for it.
Bottom line
Of course, these are not all carburetor models that can be installed specifically on the VAZ-2106 and other classic Zhiguli cars. There are a lot of Chinese devices, as well as devices from European and American manufacturers. Both single- and double-chamber models are available for sale. But they are expensive and do not always guarantee high dynamic performance and efficiency. You will only get one of the two. Therefore, the question of which carburetor is better to install on a VAZ-2106 can be answered this way: it is best to install a domestic device, one of the above. Reviews from motorists recommend installing “Ozone”. It is one of those that, with low fuel consumption, produces maximum dynamics for a car.
