Choosing a carburetor for a VAZ 2101-2107

If you are the owner of the classic VAZ model (these are models from 2101 to 2107), then most likely you have wondered more than once: how you can increase the dynamics of the car or how to reduce the amount of fuel consumed. These two points depend on which carburetor is installed on the car, how well it is adjusted, and whether it is generally suitable for adjustments. So, if the carburetor is not suitable or you just want to buy a new one, then you should know that there are quite a lot of them. Each is designed for specific conditions (economy, dynamics, environmental friendliness) and is designed for a specific engine cubic capacity. I will try to describe all the known carburetors that are installed without alterations and those that need to be slightly finished.

What carburetors were generally put on the VAZ 2101-2107?

And so, on the very first classic cars, from 70 to 82, DAAZ 2101, 2103, 2106 carburetors were installed, they were manufactured at the Dmitrievsky Automobile Plant, under a license obtained from the French company Weber, so some call them DAAZ, and others Weber -s, both names are correct. These carburetors are still the most preferred today, because their design is as simple as possible, while they provide simply shocking dynamics for cars, but their fuel consumption from 10 to 13, 14 liters repels potential users. Also, they are now very difficult to find in normal condition, new ones have not been released for more than 25 years, and old ones are sold at flea markets, just in a terrible state, to collect one, you have to buy two or three more.

The old ones were replaced by new DAAZs, 2105-2107, these carburetors have an improved system against their predecessors. They have another little-known name - Ozones. Why Ozone? Quite simply, these are the most environmentally friendly carburetors that are installed on the classics in our time. In general, they have not a bad system, but there are problems with the second chamber, it does not open mechanically, but with the help of a pneumatic valve, popularly referred to as a “pear”. And when the carburetor becomes very dirty or unregulated, then its opening occurs late or does not occur at all, due to which power decreases, the maximum speed decreases and the car begins to jerk at high revs. These carburettors are quite economical, the consumption is about 7-10 liters, and at the same time they provide good dynamic qualities.

The choice of carburetor for the "classic"

If you are a drive enthusiast and want more than the standard system gives you, then a carburetor may be the right fit for you. DAAZ 21053, released under license from the French company Solex. This carburetor is the most economical and provides the best dynamics for classic engines, but it is quite difficult to find it on sale, not all sellers know about its existence. It uses a design that is fundamentally different from the designs of previous DAAZ models. A fuel return system is used here, there is an outlet through which excess gasoline is returned to the tank, this saves about 500-700 grams of fuel per 100 kilometers.

Depending on the model, there may be many auxiliary electronic systems, such as: an idle system controlled by an electro-valve, an automatic suction system, and others. But most of them are installed on export models, we basically only have an idle system with an electric valve. By the way, it can give you a lot of problems, in this carburetor there are very small channels for fuel and air, and they very often get clogged, if they are not cleaned on time, then the first thing that starts to work badly is the idle system. This carburetor uses about 6-9 liters of fuel during normal driving, while providing the best dynamics of all the units presented above, except for the Weber. If you want to get the most out of the engine, but at the same time do not tire yourself with unnecessary details of carburetor settings, then feel free to choose it.

Well, I have listed for you all the standard carburetors that are installed on the classics without alterations, you just need to remember that if you buy a carburetor, you need to choose it according to the engine size of your car. Even if you get your hands on a good carburetor, but it is designed for a different cubic capacity, then with the help of the wizard you can change the jets in it and adjust it to suit your needs.

But don't think that choosing a carburetor setting ends with this list. If you want to get even more from the car and have a good master carburetor or you can customize them yourself, then you can turn your attention to two more types of carburetors, Solex 21073 and Solex 21083:

1. the first is designed for a volume of 1.7 cubic centimeters (for the Niva engine), it differs from 21053 in that it has more channels and more jets. After installing it, you will get even more dynamics, but 9-12 liters of fuel per 100 km will be consumed. So if you want a lot of dynamics and at the same time have the money to pay for the extra expense, you can choose it.
2. the second (21083) is designed for VAZ 2108-09 cars, and is installed on classic engines only with alterations, because the gas distribution systems for engines 01-07 and 08-09 are different. And if you install the carburetor as it is, then at a speed of about 4000 thousand, the intake air speed can approach supersonic speed, which is unacceptable, the engine simply will not accelerate further. If you want to install it, you will have to drill out diffusers 1 and 2 chambers to a larger size, and put in slightly larger jets. All these alterations are worth doing only if you are a sincere connoisseur of the classics, as they are quite laborious. The price of alterations is the consumption of less than 21053, the increase in dynamics is even more than 21073.

We can say even more, there are single-chamber and two-chamber carburetors, imported companies, but they are firstly expensive, and secondly, they do not always provide better dynamics and economy than those listed above. So it's up to you to decide what to choose and how to ride.