Carburetor Daaz 4178 High Fuel Consumption • Starting device

Design and adjustment of the DAAZ 4178 1107010 carburetor for UAZ

The DAAZ-4178-1107010 carburetor of the Dimitrovgrad Automobile Unit Plant is designed for UAZ-4718 car engines. An improvement in the dynamic characteristics of the car and a reduction in fuel consumption to 11 liters per 100 km are declared.

Installs without complex modifications. Requires a thick heat-insulating gasket from a 126 carburetor. Connection diagram. — It is necessary to use non-normally open, normally closed contacts for the relay (i.e. those that open when voltage is applied to the relay). [Dive] The correct circuit and the principle of its operation are described below

Power mode economizer

In order for the engine to produce maximum power, the mixture must be very rich.

To prepare it, the DAAZ-4178-1107010 carburetor and all other models are equipped with a so-called economizer. This system allows for additional fuel to be supplied to the atomizer. But it does not pass through the main fuel jet. A special drive is used to turn on the economizer.

#1 serdgl

Arguments for some, but still savings, more efficient engine braking, a properly connected EPH system eliminates the effect of glow ignition and shots into the muffler. Using the quality screw, you find the maximum engine speed, and then using the quantity screw you need to return the position at which the speed will again become 850-950.

Adjustment

The unit can be configured either with complete disassembly or without disassembly.

Adjusting carburetor 1107010 on UAZ:

Option 1.

• We start the car, warm up the engine;
• We unscrew the screw for adjusting the quality of the fuel mixture (the “quality” screw), and then screw it in 2.5 turns;
• Using the fuel mixture adjustment quantity screw (the “quantity” screw), we set the engine speed at 850–900 rpm.
• Use the “quality” screw to increase the speed;
• Using the “quantity” screw we return to the original mark;
• We carry out the operation until the engine speed increases when turning the “quality” screw;
• We stop manipulating the “quantity” screw after the speed begins to decrease (we set it at this mark).
• We check the functionality. If the car stalls when you sharply press or release the accelerator pedal, slightly unscrew the “quality” screw.

DAAZ-4178 can be configured both with and without complete disassembly

Option 2.

• We dismantle the carburetor and wash it well;
• We check the needle valve (if it is very worn, we replace it with a new one);
• We blow through all channels;
• We check the markings of the jets (factory markings for the main fuel jet, idle speed, transition system - 120, 48 and 60, respectively). If the numbers do not match, we change them to the corresponding ones.
• We check the air leak (install the unit, start the engine and close the air intake with your palm. If the engine stalls, there is no air leak).
• We configure the unit in the sequence of option No. 1.

#4 serdgl Starter

First of all, it should be understood that, unlike an injection engine, which is controlled electronically, a carburetor engine is controlled by the driver. To adjust the mixture composition in different operating modes, a throttle valve control drive is provided, which is connected to an additional fuel supply system during driving.

Carburetor adjustment 4178-1107010-30 • Installation of used carburetors

1. Warm up the engine. We completely unscrew the quality screw and then tighten it 2.5-3.5 turns.
2. Using the quantity screw, we bring the engine speed to 850-950.
3. The quality screw sets the maximum engine speed.
4. Use the quantity screw to return 850-950 rpm.
5. We repeat this process until, after turning the quality screw, the engine speed does not increase.
6. We stop tightening the quality screw at the moment when the engine speed begins to drop. It is at this mark that it needs to be installed.
7. It happens that when you sharply press and release the accelerator pedal, the engine does not normally transition from high speeds to idle. In this case, you need to unscrew the quality screw little by little.

The process of adjusting and tuning the DAAZ-4178 carburetor on the UAZ 469 • This model is chosen by many car enthusiasts.

Installation

How to install a DAAZ-4178-1107010 carburetor on a UAZ car? First you need to remove the air filter and housing. Then the standard device is removed. To do this, you need to unscrew the studs from the manifold and replace them with new and shorter ones. Electric valves are removed, and switching relays are installed in their place. Next, a new carburetor is installed in place of the old one. Before this, it is necessary to lay two gaskets. Now the fitting needs to be connected to the distribution fitting using a hose. Then it’s time to move on to installing the EPHH control circuit.

And at the last stage, the DAAZ-4178-1107010 carburetor is adjusted. So, with the help of special screws you can achieve optimal engine performance.

Carburetor design

These units are designed to prepare a high-quality combustible mixture. The unit then supplies it to the combustion chambers. The fuel mixture ratio is directly proportional to the amount of air that passes through the device.

The 4178 line is a two-chamber emulsion system. In general, the entire line, including the DAAZ-4178-1107010-30 carburetor, has the same device. These carburetors incorporate all the efficient and proven technologies. Here we can note the presence of a more balanced float chamber, a system of sequential opening of dampers and other technologies.

The device is assembled from standard components and assemblies and is practically no different from other designs. The carburetor consists of a main metering tank, an idle system, transition systems, a pump, an econostat and an EPH.

Design and principle of operation of the CXX

For the engine to idle at minimum speed, only a very small volume of mixture is required. Under such conditions, a fully closed throttle valve is observed. But the vacuum level in the diffuser is now not enough to start the GDS.

This is precisely why the DAAZ-4178-30 carburetor has an idle system in its design. Its task is to prepare a mixture that allows for stable operation of the engine with the throttle completely closed.

The system channels combine a special cavity behind the throttles and the upper part of the chambers. When the engine is idling, a fairly high vacuum is created under the damper. When exposed to it, fuel flows from the emulsion channel into the channel of the XX system. The ratio of fuel to air in the mixture depends on the capabilities of the jets.

Then the mixture enters the throttles, where it is then mixed with air. For this purpose, there is a technological gap between the damper and the walls of the chamber. This gap can be adjusted with a screw located on the damper lever. This is the quantity screw; it is used to adjust the DAAZ-4178-1107010 carburetor.

The amount of mixture that passes through the channel into the throttle space can be adjusted using a special screw with a conical nozzle. This screw is responsible for adjusting the quality of the mixture. If you twist it, this reduces the cross-section of the channel.

If the throttle valve opens more smoothly, then the amount of air increases significantly, but the volume of fuel remains the same as it was. The GDS still does not enter into this process due to lack of rarefaction. The result of this is a lean mixture and failure of the engine.

For a smoother transition from idle to medium operating mode, the DAAZ-4178-1107010-40 carburetor is equipped with a special transition system. It connects with its channels to the channels responsible for idling. There is a special hole here, which is made in such a way that after opening the damper it falls into the zone of maximum vacuum. This channel also supplies some of the mixture to the chambers. Thanks to this, there is no sharp transition between engine operating modes. At idle, when the throttle is completely closed, air is added to the mixture. The composition is compensated by the presence of jets. If you tighten the screw responsible for the amount of mixture, then the damper will open. The gap between the damper and the chamber increases, and the amount of air decreases. At the same time, the crankshaft speed increases. If you unscrew the screw, the frequency will decrease. On a device such as the DAAZ-4178 carburetor, adjustment is carried out by rotating the adjusting screws.

Characteristics of DAAZ-4178

EPHH ensures that the fuel supply through the idle system is turned off in forced idle mode during engine braking, when the throttle valves are closed and after stopping the engine with the ignition off. By the way, my carb was installed temporarily on Volzhana with 402, the owner himself yelled, the traction was super and they installed it for testing on 417 in the UAZ, the owner also liked the traction.

Installation

Installing the unit is easy. Even a novice car enthusiast can handle it.

Sequencing:

• We remove the standard device;
• We change the mounting studs in the manifold (shorter ones are required);
• We dismantle the energy-pneumatic valve (in its place we install a switching relay);
• We install gaskets (thin, then thick). If not installed, the pump drive may be damaged;
• We install DAAZ-4178;
• We connect the fittings of the unit and the ignition distributor with a hose;
• We lay out a new electrical circuit for economizer control (EPCH);

Even a novice car enthusiast can cope with installing the DAAZ-4178 on a UAZ

OZONE and SOLEX units • Carburetor installation

This sector can be replaced with another one available for sale, its shape is slightly different and allows you to increase the power of the spray jet, which is so necessary for UAZ 31514 engines of large displacement. 0 2.4 Fuel level mm 22-24 Name Unit of measurement 1 chamber 2 chamber Diameter of the mixing chamber mm 28 36 Diameter of the large diffuser mm 24 26 Small diffuser-atomizer Marking 4 4 Idle fuel jet Marking 41 3 Transition system fuel jet Marking 60 Main fuel nozzle Marking 115 122.5 Emulsion tube Marking A 125 ZC 125 Accelerator pump nozzle Marking 45 35 Needle valve Marking 2.1 Throttle starting gap mm 1.3-1.4 Choke starting gap mm 6.4-6.8 Level fuel.

Carburetor adjustment 4178-1107010 • Carburetor design

Setting up the carburetor of a 4-stroke scooter • Selection of jets on the Solex 21083 carburetor.

How to adjust the carburetor?

Although the design of the DAAZ-4178 is slightly different from other models of the Dmitrov plant, adjustment will not cause any difficulties for anyone.

In order to adjust the operation of the carburetor, you need to use the adjusting screws, which are responsible for the quality and quantity of the fuel mixture. This way you can adjust the engine idle speed. Often the idle operating modes are unstable, and without the appropriate settings the car will not move.

OZONE and SOLEX units

The installation of an OZONE carburetor or its predecessor WEBER differs in that the mounting holes of the unit, which have a diameter of 8 mm, do not coincide with the studs on the intake manifold. Therefore, the mounting holes must be carefully drilled to a diameter of 10 mm without disassembling the carburetor. It is also recommended to replace the accelerator pump nozzle on the DAAZ 2107 marked 40 with a nozzle marked 50, and remove the spring from the vacuum drive for opening the secondary chamber. These measures will improve the dynamic properties of the car after installing unit 2107.

The Solex 21073 or 2108 carburetor must be installed on the intake manifold through a thick heat-insulating spacer with holes with a diameter of 10 mm for the studs. This need is caused by the design features of the DAAZ carburetor, namely: the lower platform of the unit (sole) has a small thickness and, under the influence of high temperature, deforms over time.

The UAZ 31512 intake manifold itself will need to be modified (rounded) with a file or cutter, since part of it slightly overlaps the opening of the primary chamber. To increase the dynamics of the car, the following changes can be made to the Solex carburetor:

1. Instead of the standard accelerator pump sprayer with one spout on the DAAZ 21073, you can use a sprayer with two spouts from 2108, after bending the longer tube of the secondary chamber so that the spout is directed into the primary chamber. In this case, both jets from the nozzles should fall directly into the opening of the large diffuser, without touching its walls and the axis of the throttle valve and without intersecting.
2. The DAAZ 2108 carburetor already has a spray nozzle with two spouts; you only need to perform an operation with a bend in the secondary chamber tube.
3. On the axis of the throttle valve of the primary chamber there is a sector that presses the lever of the accelerator pump when the valve is opened and has a certain configuration that determines the intensity of the fuel stream and its duration when the accelerator pedal is sharply pressed. This sector can be replaced with another (commercially available), its shape is slightly different and allows you to increase the power of the spray jet, which is so necessary for UAZ 31514 engines of large displacement.

see also

Comments 30

Can you tell me in more detail why the consumption is higher when the vehicle is sluggish and less when running?

I once had a carb like this on a Volga station wagon. I took it to a garage specialist and he adjusted the valve clearances and ignition for me + cleaned and adjusted the carb. So after this, the car in the city consumed 11-12 liters, and on the highway, fully loaded with 4 people in the cabin at a cruising speed of 80 km/h, the consumption was 9.5 l/100 km. It’s true, I can’t imagine how to start a 402 engine at -25 with such savings!

ok I’ve read it, I’ll think about it and draw a conclusion, I’ll go through those magazines again, thanks everyone

set it to 126g and you'll be happy, my consumption is 8-10 on the highway in the city, 10-12 with an eight-cylinder carb you'll choke the engine and you can't reduce consumption there was a discussion here recently

When I bought the Volga, I had a Zhiguli carburetor, then a Moskvich carburetor - the consumption is the same, if not more... but the car does not drive at all, the gas response is half-zero: (. I have now gone through 151, cleaned it, set it up as advised... but have not installed it yet. Well, I think it’s better to leave the 151 than to install the VAZ one.

you'll choke the engine...151 I agree, it's capricious, but it pulls normally even in winter

leave it at 151. fuel consumption may not only be due to the carburetor

I agree! You can and in general you can put a lot of things if your hands are straight. But depending on what you want to get? The 402 itself is suffocated in terms of air. They correctly advised the standard K126GM - a normal, average carburetor without any bells and whistles. K-135, K-88, or K-89 are synchronizers for better arrival and dynamics (maybe it will eat a little more), set with re-jetting (small adaptation)... 151 - capricious (as you like). But from a Lada - perhaps more economical (although it’s doubtful) - you’ll get a pensioner’s Volga, because the 402 is strangled from the start! In general, I completely agree with comrade Wasilis. Decide what you will bet. I have a K-135, a ready-made K-89 will be installed in the spring.

+ 500100 - there is little good advice, people are different, there are few techies, many already depend on these forums - what they say is what they do, they should read B.Z. participants, yes, this task ALREADY HAS SUCH A BEARD! BEARD! - this is already such an ancient story... It seems to me that if you start writing in clever terms, citing numbers and formulas + articles from a magazine, then you can sway people like that... like becoming an EMPEROR of motors. But no one values ​​life experience, technical education and direct hands anymore - everyone is interested in what they will say on DRIVE 2 RU - they wrote crap - it doesn’t EAT, and it’s rushing! And the person runs to buy and install... Then, because he is sorry for the money, he does not admit the obvious. At the drive they said... that means it has to be... Eeeeh...

The volume is suitable for 2141, but not 083. 20 eats... How do you measure? Do you warm up in the morning? And yes, you are driving incorrectly. At least up to 3000, then switch. Max torque at 2500 is the economy mode. Driving as tightly as you can is bad. And the consumption is correspondingly higher.

you won't win anything. the engine will burn as much as it needs. But actually, why set yourself from 2108? put it from the field just like that. I have it now, but I think that in a week I will change it because there are dips at the top of the lower gear, dips in the middle of the rest, it starts poorly in the cold - it’s all about the VAZ carb.

Option 1. • Installation of used carburetors

1. DAAZ 2101/02/03 WEBER. It is impossible not to mention this predecessor of OZON carburetors, which works wonderfully with UMZ engines with a displacement of 2.4 liters installed on the UAZ 31512. WEBER is not as economical as its newer Dimitrovgrad counterparts, but in terms of traction characteristics it produces excellent results. Fuel consumption is slightly lower compared to K 131 or K 126. The disadvantage of the unit is that it is difficult to find in working condition. Typically, you need to find two or three old Webers to assemble one working one.
2. DAAZ 2107 OZONE. A very suitable option for those who do not care about overclocking dynamics. Fuel consumption on the UAZ 31512 model after installing the 2107 carburetor is noticeably reduced. We deliberately ignore the second modification of OZONE - DAAZ 2105, which is designed for a much smaller engine displacement.
3. DAAZ 2140 OZONE is an analogue of 2107 with a different set of jets and a less successful idle system. Suitable for installation if you already have it in stock, but if not, it’s better to purchase 2107.
4. DAAZ 2108 SOLEX, DAAZ 21073 SOLEX. The first is designed for VAZ cars of the eighth and ninth families, the second is installed on the VAZ 21213 Niva. Solex carburetors are complex and high-tech products; their installation on the UAZ 31512 is completely justified, as it gives good results. Preference should be given to modification 21073, which has larger diffuser sizes. Both modifications are equipped with EPHH with electronics, so when installed on older machines, some modification will be required to connect it. In other cases, the electronic system is simply discarded, but this affects the efficiency of the car.
5. DAAZ 4178 SOLEX. Among the carburetors of the Dimitrovgrad plant, it is the most adapted for UAZ cars; it is perfect for both the UAZ 31512 and UAZ 3303 models. It can also be installed on older cars (before 1985). Reliable, economical, easy to install, and has the largest number of positive reviews from admirers of the brand.

Main dosing system

This system is designed to supply the required amount of fuel mixture at different engine operating modes. It is capable of operating in all modes except idle. Thus, at average engine loads, the metering system must provide a lean fuel mixture of a constant composition. If we look at the design of the simplest carburetor, and then look at the technical characteristics of the DAAZ-4178 carburetor, then in the simplest design, as the throttle valve opens, air passes through the diffuser more slowly than the fuel that enters the chamber from the atomizer is consumed . This enriches the mixture. To prevent the mixture from getting too rich, engineers have provided the ability to compensate the fuel mixture ratio using the air ratio. The amount and volume of air can be adjusted using the throttle valves. In carburetor units, such compensation processes constitute a dosing system.

In most models from DAAZ, these methods of compensating the composition of the fuel mixture work on the basis of pneumatic braking. Thus, fuel enters and is then sprayed not from the float chambers, but through a special emulsion channel. This is a special tube. There are special technological holes in the walls of the tube. They facilitate the release of air coming from above from the jet. There, in this channel, the mixing process takes place, and the mixture itself can come out of these technological holes.

As the throttle valve opens, the vacuum and volume of the mixture increase. The volumes of fuel passing through the jets and the amount of air also increase. The amount of air is completely proportional to the volume of fuel. This ensures compensation.

In short, the GDS creates all the conditions for the motor to operate at low, medium and high loads and modes. This carburetor DAAZ-4178-1107010-30 provides the engine with stable power supply and operation in all possible operating modes.