The design of carburetors for VAZ-2106 and VAZ-2103 cars

Lada 2103 “beginning of the journey” › Logbook › carburetor DAAZ 2107-1107010-20 (part 4 - setup)

I won’t repeat about the level in the float chamber (I think everyone knows this),
but many have forgotten about adjusting the dampers and some don’t even know (and there are some among those who do it for others’ money)

Well, let's start with the main dampers

open the damper until the tendril on lever 3 (black arrow in the photo) touches lever 2 (red arrow)

in this position, measure the gap between the edge of the damper and the body

it should be 6mm, the gap can be adjusted by bending the tendril (black arrow in the photo) of the lever3

with a full opening, I do it much easier at the moment of the correct distances (b top photo) the flaps occupy a perpendicular position with the lower plane of the carb

and setting up the launcher

and check the gap using a drill with a diameter of 5.5 mm

Purpose of an important node

Many motorists who have no idea how to adjust the carburetor on a VAZ-2103 simply do not understand the principle of operation and design of this device. The function of any carburetor is to mix gasoline and air together. Thanks to this simple device, a special mixture appears in the car at the moment the power unit is activated, transported into the engine cylinders. In fact, how efficiently the vehicle itself operates depends on how well the engine is supplied with gasoline.

Among other components of the device in question, it is worth noting such elements as air and throttle valves, mixing chambers and idle air valve. Of course, these are not all the components of the VAZ-2103 carburetor; in the material below we will consider in detail the operation and principle of setting each individual unit.

The function of the VAZ-2103 carburetor is to mix gasoline and air together

The functionality of any power unit that interacts with a carburetor depends on several important criteria:

• starting and warming up the engine;
• idle devices;
• design responsible for controlling the amount of fuel;
• accelerator pump (how quickly the car can accelerate depends on it);
• the performance of the elements located in the central dosing chamber;
• econostat (located in one of the internal combustion chambers of the engine).

Model range of carburetors for VAZ 2106

The VAZ 2106 was equipped with carburetors of different models. As a rule, cars from 1974 to 1976 were equipped with a carburetor from the DAAZ plant, model 2103-1107010-01. This is a licensed copy of a Weber carburetor. Structurally, the carburetor was no different from the carburetor of the VAZ 2101 car, but had slightly different calibration parameters, which we listed in the table.

Later, when a vacuum ignition timing corrector began to be used in the design of the ignition system, the carburetor design was changed. The factory index of the Ozone carburetor is 2107-1107010-20. Cars that were equipped with an old-style distributor, without a vacuum ignition timing corrector, were equipped with exactly the same carburetor, but without the tube that connected the intake manifold and the vacuum adjustment mechanism on the distributor. The model of such a carburetor is 2107-1107010-10.

Adjusting the fuel level in the float chamber

The free play of the float should be 6.5 mm on one side and 14 on the other. This can be adjusted using a checking template by placing the camera vertically. In this position, the float slightly touches, but does not press on the valve ball.

If the distance does not correspond to the required 6.5 mm, then you need to slightly bend the tongue of the valve (needle-shaped), adjusting the size to the required one, indicated in the figure by the arrow under the letter “A”.

The next step is to adjust the degree of opening of the needle valve through which gasoline enters the float chamber. When the chamber is filled, the float rises and the flow of fuel decreases; when you sharply press the accelerator pedal and open the throttle, the fuel goes into the cylinders, the float drops and gasoline enters the float chamber.

Next, we adjust the deflection of the float in the opposite direction. To do this, move it away from the lid as much as possible and measure it with a template, the thickness of which should be 14 mm with a certain tolerance (Fig. above, picture on the right).

If the distance is greater or less, you need to bend the stop of the float mounting bracket and set it to no more than 14 mm.

Now, after the adjustments have been made, the free play of the float should be within 8 mm. Adjusting the VAZ 2107 carburetor also includes checking fuel filters and incoming screens to maintain a good supply of fuel.

Features of the VAZ 2106 power system

The power supply system of the VAZ 2106 car is arranged according to a standard scheme, which was used on all carburetor cars of the last century. Fuel from the tank is supplied through a copper fuel line to the engine compartment. The pressure required to supply fuel is created by a diaphragm-type fuel pump, which is driven by an eccentric cam. The fuel is cleaned from large fractions by a mesh filter in the gas tank, as well as in the gas pump, however, as practice has shown, this is completely insufficient for the smooth operation of the carburetor.

Therefore, almost all owners of classic Zhiguli cars install additional fine filters directly at the inlet to the carburetor. These filters are usually made of transparent plastic, which allows you to control the degree of contamination of the mesh or pleated filter element.

Adjusting the performance of the accelerator pump

At the third stage, work should begin with checking the functionality of the pump. To do this, the fuel generated during ten full cycles of operation of the throttle valve control lever is collected in a special beaker. If everything is functioning normally, you will have approximately 5.25-8.75 cubic centimeters of fuel mass. Otherwise, the pump must be completely pumped (about 9-10 times), after which the check is repeated. In that situation, if bleeding does not help, the fuel pump accelerator should be replaced with a new one.

Adjusting the float of the "nine" carburetor

Setting up floats in Solex chambers is a simple procedure that does not require the use of specialized tools or special skills.

However, in the factory, this procedure is partially automated and is performed using a special template, which significantly simplifies the adjustment. But if you do the work yourself, you don’t need a template, but we will need the following tools and equipment:

• two screwdrivers, with a flat head and a Phillips head;
• a caliper or ruler (it is better not to use metal, wood or plastic);

• a piece of wire with a diameter of no more than 2 mm (you can use a thin drill or a similar round rod).

This set is sufficient to perform the entire range of adjustment procedures.

Diagram and design of the Ozone carburetor

The structure of the VAZ 2106 carburetor is shown on the Togliatti branded poster, which we posted on the page. There is nothing extremely complicated in the design of the carburetor, but the operation and, most importantly, the adjustments of some of the main parameters of this carburetor are worth mentioning separately. Basic Ozone carburetor systems:

• autonomous system XX;
• pneumatic diaphragm type starting device;
• accelerator pump, also pneumodiaphragm type;
• economizer with pneumatic drive;
• transition systems that ensure smooth operation of the secondary chamber;
• crankcase ventilation system.

Despite the rather primitive design, the carburetor performed excellently in all engine operating modes. However, major systems require adjustment to achieve optimal engine performance, economy and performance.

Adjustment process

The VAZ-2106 carburetor can be adjusted personally by the car owner or at a specialized station. It should be remembered that the operation of the vehicle in any driving modes, in any weather and under various conditions will depend on the quality and correctness of the procedure performed. Therefore, before starting repairs, it is important to acquire certain skills. You need to know well the structure of the carburetor and the principle of its operation. You also need to have a certain set of devices and tools:

• various screwdrivers;
• keys of various sizes;
• drills and probes (round);
• toothpicks;
• rubber bulb;
• ruler;
• tweezers;
• calipers;
• rags;
• special containers for washing.

If you have a full set of tools, you can make high-quality adjustments quite quickly.

Adjusting the starter

The starting device is adjusted by opening or closing the air damper. This operation can be carried out directly on the car; you just need to remove the air filter. In addition, you will need:

1. Unscrew the plug of the starter, since there is a special screw under it.
2. Press the three-arm lever. To do this, pull out the choke lever in the cabin, then close the damper and push the rod into the body of the starter all the way.
3. Using a drill with a diameter of 5.5 mm, check the size of the gap from the lower edge of the damper to the chamber wall.
4. Using a thin screwdriver, turn the adjustment screw, thereby changing the clearance value.
5. Next, you need to hold the air damper by the three-arm lever in the closed position and use a 1 mm drill to check the gap between the chamber wall and the throttle valve.
6. Adjust the gap by installing the lever in another hole or by bending the rod.

Shifting the lever to adjust the gap

Float adjustment

This stage is one of the most important processes of general configuration. The carburetor float is an element of the so-called float chamber. If an increased amount of air or gasoline in the mixture enters the combustion chamber, the engine will run unevenly. This increases both gasoline consumption and its toxicity when there is a lot of fuel supplied. Conversely, there will not be enough fuel for normal combustion if there is little supply. The correct amount of mixture requires adjustment of the float. It is recommended to set its stroke to 8 mm.

In addition, before installing the indicator, it is advisable to remove it and check for the absence of various violations, defects and other problems.

If a car enthusiast suspects poor quality work, the float needs to be replaced altogether.

Mixture adjustment

All actions are carried out using control screws. They have a factory press-fit made of plastic, which limits their speed in the range from 50 to 70°. If the presented range is not enough, you can break off the press-on and set the required value. However, this must be done on a warm engine.

Adjusting the throttle valves

Idling

1. Start the engine and wait until it warms up to a normal temperature of 90 °C. After this you need to turn it off.
2. Find the screws on the carburetor and tighten them completely. After that, unscrew the quality screw by five turns, and loosen the quantity screw by three.
3. Start the engine and use the speed screw to set the speed on the tachometer to 800 rpm.
4. Tighten the quality screw until the number of revolutions begins to drop. Periodically you should stop and add half a revolution.

Engine tuning 2103

The potential of the VAZ 2103 engine is so high that it is difficult to resist the temptation to squeeze more out of it. There are craftsmen who squeeze up to 200 horsepower out of a car. This kind of tuning of the VAZ 2103 engine is extreme in nature and is not recommended for everyday driving on regular roads.

There are many options for boosting an engine. One way to increase engine power and improve other performance characteristics is to convert the engine into a VAZ 2106 engine. To do this, you need to bore the cylinders to a diameter of 79 mm and replace the piston group with parts from a six. The remaining elements remain the same, the units are unified in all parts. Assembly of the VAZ 2103 engine after such tuning is carried out without problems.

If you take care of your car and timely repair the VAZ 2103 engine, the car will not let you down on the road. And it will delight its owners for many years with its reliability and excellent driving performance.

Adjusting the choke or trigger

Install the carb, but do not install the air filter. Pull the choke out completely and close the valve. In this position, you need to adjust the air damper cable.

Try pulling out and removing the choke several times. The damper should open and close completely without jamming. If everything is done correctly, you can install the air filter in place, connect all the hoses and carburetor drives. It's time to start adjusting the idle speed of the VAZ 2109. Don't forget about connecting the EPHH.

How does a carburetor work in a VAZ-2106 car?

Before proceeding directly to setting up the carburetor, we will describe its structure in detail. Since about 1980, the manufacturer began installing such devices known to our compatriots as Solex and Ozone on VAZ-2106 cars, so we will focus your attention on them.

The following elements are used in the design of these carburetors:

• float chamber in which the needle valve is located. Its main task is to maintain a stable level of fuel entering the device;
• a dosing system in which the required amount of fuel is set using a special throttle valve;
• control mechanisms that regulate the position of the throttle valves and enrichment of the air-fuel mixture;
• an econostat designed to use fuel wisely, as well as an accelerator pump;
• idle system.

The carburetor works on a very simple principle. The fuel moves from the float chamber to a special compartment in which it is mixed with air.

All proportions are regulated by dampers. If the settings are made correctly, a mixture is obtained that ensures normal engine starting. Otherwise, you will encounter the following problems:

• severe overheating of the engine even at low load;
• the appearance of black smoke from the exhaust pipe;
• excessive fuel consumption;
• a significant reduction in the power of the power unit.

To fix these problems, you need to properly adjust the carburetor, which we will do below.

Before you properly adjust the carburetor on a VAZ 2106 with your own hands , it is important to carry out a number of work steps:

• Adjust the thermal clearances of the gas distribution mechanism.
• Set the optimal ignition timing.
• Open the air damper completely.

All work on setting up the carburetor unit is carried out on a warm engine. Do not forget that during the process you may need new parts and rubber products, so it is better to purchase a repair kit in advance.

How to choose a carburetor for a VAZ 2103 engine

I'm going to install BSZ. On a car 1.5 72 hp. From the factory there is a Weber carburetor 2106-1107010 manufactured in 1976, which accordingly does not have a pipe connected to the vacuum chamber, but there are pipes for the throttle body heating system.

Please advise which one is better to install a carburetor and what to do with the heating pipes of the diesel protection?

Features of do-it-yourself setup

Before adjusting the carburetor, the power unit should be warmed up. You cannot make adjustments on a cold engine, because... it will not bring positive change. In addition, you will need to remove the gas pedal linkage from the throttle valve, disconnect the ventilation tube from the crankcase and make sure that there is no vacuum in the advance regulator tube.

After this, you should find the screws that are responsible for adjusting the composition of the mixture (they are also called quality screws) and begin to tighten them clockwise. Do this until you hear a strange and intermittent noise from the engine. When this happens, you need to stop tightening and unscrew the screw one turn to its previous position. Make sure the unit runs smoothly.

The action is repeated with all screws until the problem is resolved. In addition, it is recommended to clean the carburetor, which is preventative in nature and is aimed at preventing problems with the unit in the future.