Engine NIVA 21213, features, problems and tuning

The first NIVA VAZ 2121 cars were released from the assembly line in April 1977. Initially. the car was not very popular among Soviet motorists due to its high cost, high fuel consumption, small luggage compartment and lack of doors for rear passengers.

The bulk of the cars were exported, including even to Japan. But, in 1985, the government reduced the cost and the car became more popular. Initially, a 4-cylinder engine with a carburetor with a displacement of 1580 cc was installed on the Niva. cm and power 80 l. pp., produced on the basis of the engine from the VAZ-2106.

In 1994, a modernized version of the Niva SUV was produced, which was equipped with a five-speed gearbox and a larger VAZ 21213 engine. Let's take a closer look at this engine, which was also installed on the VAZ-21214, Chevy NIVA and sometimes on the VAZ-2107 (seven).

Content

The most popular and widespread SUV of domestic origin can be called Niva 4x4. This car has been produced for many decades, once designed as the main transport for residents of difficult rural areas. Even with such serious competition associated with the emergence of a large number of different foreign cars, the model is in demand. This is primarily due to the relatively low cost and good cross-country ability of the vehicle. However, in technical terms, the SUV has long been outdated and is inferior to many analogues. That is why we will take a closer look at tuning the Niva 4x4 engine, increasing power using the most common methods.

What cars was the power unit installed on?

Tolyatti engineers designed the 21213 internal combustion engine to replace the 2121 for all-wheel drive off-road vehicles. The engine is found in AvtoVAZ SUVs and minivans:

• "Lada Niva" 21213 in the body of a 3-door station wagon;
• "Lada Niva" 2131 in an extended 5-door body;
• "Nadezhda" 2120 is a 4-door minivan.

Engine 21213 was installed on the export right-hand drive model Niva 21216.

Available tuning options for the installed engine

If we consider the Niva in relation to the new years, then we should take into account that engine tuning comes in two options:

Recently, chip tuning has become very popular, which allows you to significantly increase the power indicator in the shortest possible time. However, this tuning method should be treated with some caution, which we will discuss in more detail later.

Niva engine chip tuning

Not all SUVs of domestic origin have an on-board computer. At the same time, we should not forget that some on-board computers are in poor condition and in fact do not affect the operation of the engine.

When considering this tuning method, we note the following points:

• You can increase the power by about 10-30 hp. or more. It all depends on what parameters were set before tuning.
• It is recommended to entrust this type of work to specialists who provide services in this field of activity. This is due to the fact that incorrectly carried out chip tuning can cause various problems with engine operation.
• The technical condition of the internal combustion engine design largely determines whether chip tuning can be carried out. If the motor is in poor technical condition, then increasing the load causes rapid wear. Therefore, if the process in question is carried out correctly, a complete diagnosis is first performed.
• As a rule, the automaker sets minimum power values, leaving a margin. If chip tuning has not been carried out previously, the programmer will be able to configure the engine to increase its power. If the modification in question has already been carried out previously, it will no longer be possible to carry it out again.

In general, we can say that chip tuning is carried out in many cases when it is necessary to increase engine power. However, in order to significantly increase traction, it is necessary to improve the geometry.

DIY methods for increasing engine power

The simplest and most common ways to increase engine power:

All of the above methods can “revive” the engine, increase dynamics and power, but financial sacrifices will be required.

The Niva car is not distinguished by hurricane dynamics and high maximum speed. Consequently, those who want to get more power and thrust from this machine have developed and tested various methods of engine tuning, differing in the difficulty of installation and use and the resulting result.

Instructions

1. You can independently increase the power of the Niva engine using the following methods: - install lightweight valves and their guides, a lightweight flywheel; - increase the cross-sections of the exhaust and intake channels of the cylinder head; - increase the cross-section of the intake manifold; - install a camshaft, which increases power and torque by medium and low cycles;

- install a direct-flow exhaust system; - install a sports (lightweight) timing drive. - install a zero-resistance air filter; - bore the engine cylinders (in order to increase the working volume). For a carburetor engine, a Solex carburetor with 24-26 mm diffusers is additionally installed instead of the standard one.

The ignition system is changing to electronic with a Hall sensor from more modern VAZ models. A motor with increased power will require the installation of a radiator with an increased cooling area. The described program allows you to remove up to 120 hp from a VAZ-2121 engine. When installing 2 Solex carburetors, it is possible to increase the power to 136 hp. 2.

Many specialized companies offer the installation of turbocharging for Niva and Chevrolet Niva cars based on the GARETT GT17 turbocharger. Installation cost is about 60,000 rubles. Result: an increase in power from 80 to 105 hp, torque from 120 to 170 Nm, and a slight decrease in fuel consumption. The source of the engine is preserved, the fuel quality is gasoline with an octane rating of at least 95, and maintenance is standard for turbocharged cars. 3.

Fine tuning of the motor control system with support for chip tuning. Metamorphosis of the program in the electronic control unit eliminates shortcomings made by the developers and not noticed during testing. For a standard Niva engine, chip tuning will give an increase in power and torque of 10-15%, for a turbocharged one up to 35-40%.

Instructions

1. Boring a new engine makes no sense, except for those cars that are being prepared for participation in sports competitions. In all other cases, the cylinder block is bored during a major overhaul of the power apparatus. 2. Due to the fact that the cylinder block is bored using special industrial equipment, during advance preparation for this process, the engine is removed from the engine compartment of the machine. 3.

After completing this task, the motor is completely disassembled, and after this, all the parts from which it was recently assembled are checked. 4. The “bare” engine cylinder block is delivered by auxiliary transport to the workshop to an expert in boring the specified parts. The master, after researching and performing the necessary measurements of the internal surfaces of the cylinders of your block, will give recommendations on obtaining a repair piston group of a certain size, which, after purchase, is delivered to him, to the workshop. 5.

Instructions

But at the insistence of environmentalists, the supply of gasoline to the injectors was reduced. 3. In order to make metamorphoses to the existing engine operating parameters, you need to connect the computer or laptop adapter to the diagnostic connector of the car. Of course, the appropriate applications must be installed on the computer. 4.

Using the software, the operating parameters of the engine systems are adjusted, as a result of which the engine operation is optimized, and it becomes more responsive due to modified injection and increased power. The dynamics of the Niva car while driving also improves. 5.

Paradoxical but true. Despite the increased supply of gasoline to the working mixture, the vehicle's operating fuel consumption is reduced, which has a beneficial effect on the ecological atmosphere of the environment. Note! There are programs on sale on the market that are intentionally prepared for chip tuning of Niva cars.

What Russian doesn't like fast driving? If there is no chance of buying a car with a huge number of horses under the hood, the search begins for methods to increase the engine power of your car. It will be easier to do this with a carburetor engine, because in an injection engine the control is carried out from the control unit. You can “work magic” with a carburetor in your own garage with basic auto mechanic skills.

Features of work to improve geometry

The low wear resistance and efficiency of an SUV engine of Russian origin determines that it is practically impossible to do without mechanical modifications. Many people call such work a change in geometry.

The internal combustion engine installed on the vehicle in question can have many systems modified. Experts recommend starting with upgrading the carburetor. This is due to the fact that due to the use of imperfect production technology, its efficiency is very low. Modernization is carried out as follows:

1. To begin with, it is recommended to replace the nozzle. The factory version is installed with 1 cam, but should be installed with 2 cam.
2. The pump accelerator should be updated.
3. All sharp corners that could cause turbulence in the air flow are removed.
4. Some craftsmen also clean accessible surfaces, reducing their roughness. Due to this, the efficiency indicator is significantly reduced.

Insert: Important: It is important to clean the carburetor structure from carbon deposits and dirt. To do this, use gasoline or a rag. If the dirt has become too deeply embedded in the surface, you can use special cleaning products.

Refinement of the gas distribution mechanism

The timing also largely determines the power and other technical features of the engine. Tuning the gas distribution mechanism consists of increasing the diameter of the valves followed by sealing. As practice shows, such modernization allows increasing power by almost 10%.

In many cases, when improving the engine part in question, the pushrod is replaced. Its improvement consists in increasing the intake and exhaust tappets, which can significantly increase the engine power rating.

Experts' opinion

Gena. The engine can be called the real heart of the car. Many people recommend starting tuning with it, since only by improving the engine can you make the car run over bumps and fords. I will say right away that the task is not an easy one. Improving an engine can take a lot of time and effort. Therefore, you should be prepared for difficulties.

Stanislav. The Niva is a good car, even one of the best produced by the domestic auto industry. However, it has many disadvantages, among which we note the low engine power and its unstable operation. That is why, almost immediately after purchasing this car, I immediately upgraded the engine.

Vitaly. I decided to modify the standard Niva engine. There was a lot of work, so I decided to entrust it to professionals. Although I myself have some experience in engine repair, I did not undertake its complete modernization. As a result of the work done, the guys increased the power by 60 hp. Of course, not an impressive result, but still the traction has increased significantly.

What can be improved in the Niva 4×4 model

Most representatives of the domestic automobile industry require high-quality improvements, and Niva is no exception. Tuning can significantly improve many parameters of an SUV, from the interior to pumping the chassis.

Changing the suspension helps increase the vehicle's passing ability. You can also change the external design of the body, making it more modern and original. Many people try to increase the power of the power plant by tuning the engine.

Most often, supporters of updates turn to professionals for help, although tuning a Niva 4x4 with your own hands is quite possible. You just have to take into account that remodeling a car will require significant costs and certain skills.

The small SUV went into mass production in April 1977. Today the VAZ 2121 is a passenger car with increased cross-country ability. Available in two body types: a three-door hatchback and a five-door station wagon. It has permanent all-wheel drive and a five-speed manual transmission.

Let's sum it up

There are quite a large number of ways to modernize the Niva engine, all of them have their own specific features. It would seem that replacing consumables with better ones is an insignificant upgrade, but it allows you to increase engine power by several tens of horsepower. More significant upgrades also improve the technical qualities of the engine, but do not forget about the increase in load, as a result of which its service life is reduced.

It is recommended to entrust serious engine modernization to professionals. This is due to the fact that even minor mistakes made can cause rapid wear and tear of the structure and render it unusable. If the engine is in poor technical condition, then attention should be paid to the possibility of completely replacing it: the amount of work and costs are reduced. The motor must be not only powerful, but also reliable, which should not be forgotten.

Niva engine characteristics

Years of manufacture – (1994 – present day) Cylinder block material – cast iron Power system – carburetor (21213) / injector (21214) Type – in-line Number of cylinders – 4 Valves per cylinder – 2 Piston stroke – 80mm Cylinder diameter – 82mm Compression ratio – 9 .4 Niva engine capacity 21213 – 1690 cm3. Engine power Niva 21213 – 81 hp. /5200 rpm Torque - 125 Nm / 3000 rpm Fuel - AI93 Fuel consumption - city 11.5l. | track 8.3 l. | mixed 10.5 l/100 km Oil consumption - 700 g per 1000 km Niva engine weight - 117 kg Overall dimensions of the Niva 21213 engine (LxWxH), mm - Oil in the Niva 21213 engine: 5W-30 5W-40 10W-40 15W-40 How much oil in the Niva 21213/21214 engine: 3.75 l. When replacing, fill in about 3.5 liters.

Niva engine life: 1. According to the plant – 80 thousand km 2. In practice – up to 150 thousand km

TUNING Potential – 200 hp. Without loss of resource - 90 hp.

Changing engine oil in NIVA 2121 synthetic for VAZ

We are changing the engine oil. We take a good manufacturer with a package of additives against scuffing and wear, and fill it into the engine according to the approval.

These are inexpensive Optimal Liqui Moly 5W40 with VAZ approval.

There is a good film for lubrication and excellent tensile properties when cranking and pumping through the system. Parts are always lubricated without oil starvation.

Oil with an anti-carbon additive and cleaning from combustion products perfectly protects the intake tract and valves from clogging and sediment.

This will give an advantage in power with clear opening of the valves and precise fuel supply and injection.

Therefore, it is necessary to take a comprehensive approach, including to fuel.

Changing oils in gearbox and axles

Semi-synthetic 75W90 ZIC, for example, or Liqui moly TDL 75/90 is poured here for better gliding and smooth shifting.

Fill the Bridge with the same thing to avoid corrosion and gearbox failure.

The standard, see on the packaging, should be GL-4.

For good operation of the cooling system without overheating, and less influence of temperature on the engine at high loads, you need to fill only good antifreeze.

Meguin red with good anti-rust properties, or G12 Rusef, would be suitable.

Malfunctions and repairs of the VAZ 21213 / 21214 Niva engine

Engine VAZ 21213 1.7 l. carburetor/injection (21214) in-line 4-cylinder with overhead camshaft, Niva timing belt has a chain drive. Based on the 214 engine, the VAZ 2123 engine is produced for the Chevy Niva; the differences in adapting the block for installing a pulley in the engine compartment and mounting attachments are technically almost identical. The main differences between the VAZ 21213 engine and the 2106 are the cylinder diameter is 82 mm, the cylinder head, the Niva 21213 engine block from the 2106 is smaller in height. Among the advantages of the 213 engine, it is worth noting the presence of a chain tensioner (no need to tighten it) and hydraulic compensators (no need to adjust the valves). Disadvantages of the Niva engine - noisy, consumes oil, prone to overheating and vibrations, low resource. The motor has all the problems of the classic series, the 21213 Niva engine still heats up, troits, knocks, etc., what the problems are, for each case, are described in detail HERE, in the problems and malfunctions section.

Device

The internal combustion engine was specially designed for the Niva and, in theory, refers to motors designed for cars with rear-wheel drive, installed in cars along its longitudinal axis. The design of the crankshaft is similar to that installed on the VAZ-2103 and has crank radii equal to forty millimeters.

To reduce vibrations, the shaft is designed with additional counterweights and journal diameters increased by 0.02 mm to reduce the gap between the liners and the journal, so that the oil layer is created at an optimal thickness and the dynamics of the shaft are improved. The upgraded shaft can be installed on the 2103 modification engine.

This engine has a new design of pistons with an oval recess in the bottom. The piston pin, 67 mm long, is fixed using retaining rings. The hole for the pin is shifted relative to the piston axis by 1.2 mm. Each piston weighs 347 grams, and to avoid imbalance, all four pistons are brought to the same weight.

The design of the connecting rods has also changed slightly - its length has become 136 mm, the diameter for the connecting rod journal is 47.8 mm, and for the piston pin - 22 mm. New bolts were installed in the connecting rod cover to increase the reliability and accuracy of assembly.

The cylinder head is similar in design to its predecessor (21011), but is not a copy. It is made lower by 1.8 mm, and its height is 111 mm, the combustion chamber has a volume of 30 cm3, dimensions 52×81 mm. The head was equipped with an updated camshaft with a modified shape of the pushers to increase the opening phase of the intake valves. In general, the valve mechanism is taken from the 2101 engine.

The timing drive is carried out using a chain with a damper and a tensioner with an enlarged shoe.

On carburetor engines, contactless ignition was installed, with a switch, distributor and ignition coil.

Tuning the Niva 21213 and 21214 engine

Chip tuning of Chevrolet Niva or 21214 engine

There is no point in writing about this for a long time because the Niva chip is useless, the atmospheric engine cannot be stirred up with a chip, and all the rave reviews are nothing more than an attempt to justify a waste of money, let’s move on.

How to cheaply increase the power of a VAZ 21213 engine

The question on the agenda: how to increase the power of a Niva engine without any special tricks? The first stage is to increase the piston stroke to 84 mm using a crankshaft from a VAZ 2130, 82 mm pistons with a piston pin offset of 2 mm and we already have 1.8 liters. The second stage is to bore the cylinders for an 84 mm piston, thus assembling the 1.9 engine for the field. To fully boost the VAZ 21213 engine, you need to add a more efficient carburetor, bore the cylinder head channels (how to do this is described HERE), the intake diameter is 33 mm and the exhaust diameter is 31 mm, it is advisable to use light connecting rods, in the end we will get about 100 hp. The third stage - we build a 2 liter motor. We buy on the market a tuning crankshaft with an 88mm stroke and 84mm pistons with a pin offset of 4mm. A complete modification of the VAZ 21213 engine will be completed after installing a Nuzhdin camshaft (or an analogue) with a lift of 11.2, a light flywheel, light connecting rods and a modified carburetor, all of which will give a total of about 110 hp.

Niva engine boring options

— piston of standard diameter, increased stroke 1.8 liters. 82x84

85 hp Maximum torque

135 Nm at 3000 rpm - larger diameter piston, increased stroke 1.9 liters. 84x84 - larger diameter piston, increased stroke 2.0 liters. 84x88

16 valve engine for Niva

From time to time on forums they raise the issue of installing a 2112 engine in a Niva; this is a rather difficult and pointless task, due to the fact that 16V engines love speed and are not well suited for an SUV. If you want speed, sell your car and buy a Priora. The Niva is not suitable for high speeds and its tuning should be aimed, first of all, at increasing traction at the bottom.

Turbine for Niva

The pros and cons are described HERE in the “Turbo Classic” section.

Compressor for Niva

We use kit kits based on the PK-23-1 supercharger or analogues with a pressure of 0.5 bar, injectors from the 406 Volga engine, the piston remains factory, the output is more than 100 hp. The resource will be reduced, but not critically. It is not recommended to install more efficient superchargers; the factory piston will not hold up and the engine will require significant and expensive changes.

The main part of any car is its engine. The Niva's power unit often does not live up to the car owner's expectations due to its rather low efficiency and high fuel consumption. Therefore, the logical question arises how to improve these indicators. Ideally, I would also like to increase the car's power, improve torque, increase dynamics and speed, improve driving characteristics and make the car more obedient. All this can be achieved by tuning the Niva 4x4 engine.

Peculiarities

The VAZ 21213 four-cylinder eight-valve petrol engine has a displacement of 1.7 liters. The power of the power unit is 81 horsepower with a torque of 125 Nm.

Engines 21213 in their latest generation were equipped with an injector and ran on high-octane 93 gasoline. The cast iron cylinder block ensured maximum strength for this power unit.

The use of numerous automatic engine control systems made it possible not only to change the traction performance of this engine, but also significantly improved fuel efficiency. Niva in suburban mode consumes 8.3 liters of gasoline per 100 kilometers when driving at cruising speed.

Starting from 2021, customers will also be offered Nivas with a diesel engine.

The Niva engine with an overhead camshaft is equipped with a chain drive, which significantly simplifies the service of this power unit. The chain drive does not require replacement of the tensioner or any adjustment during operation of the motor. We also note the presence of hydraulic compensators, which relieves the car owner of the need to carry out the procedure for adjusting the valve clearance. All maintenance work on this engine can be performed by the car owner himself, without contacting branded service stations.

Tuning options

When refining a Niva engine, a new crankshaft, cylinders and piston system are most often installed. As a result, the car receives excellent speed characteristics and cross-country ability.

There are two types of Niva engine tuning. The first includes chip tuning, and the second includes mechanical modification of the element. Chip tuning includes software upgrades, and is carried out only on new, fuel-injected SUVs. It includes flashing the control unit settings. It is performed by specialists quite quickly - within half an hour, but requires knowledge of software and additional electronic equipment.

Mechanical modifications are possible on any Niva, and this is the most popular type of tuning of a car’s power plant. With its help, you can significantly improve the technical characteristics of vehicles, and it is based on making some changes to the vehicle systems.

Installing a carburetor on a Niva

Until 1994, the Niva 2121 was equipped with Ozone carburetors, which still operate successfully to this day. Assessing all the positive and negative aspects of existing designs, AvtoVAZ began installing Solex 21073 carburetors on the Niva. According to numerous car enthusiasts, this mechanism is more economical than Ozone. The engine is characterized by better performance, but it becomes more difficult to configure, more capricious to the quality of gasoline and oil vapors penetrating from the crankcase.

You can install or replace the carburetor yourself using standard tools. First, you need to dismantle the air filter, loosen the fuel line clamp and carefully remove it from the fitting, draining the gasoline in the fuel line into a prepared container. Then you should loosen the clamps and remove all pipes connecting to the carburetor:

• draining fuel into the fuel tank;
• carburetor heating unit;
• vacuum regulator of the ignition distributor;
• exhaust gas recirculation systems;
• suction of crankcase gases.

By removing all the electrical connectors, you can remove the throttle linkages and the choke control cable. Having disconnected all external communications from the carburetor, it is necessary to unscrew the nuts securing it to the intake manifold. Then you can carefully dismantle the mechanism. Installing a new carburetor is performed in the reverse order.

Geometry improvement work

Due to the low engine efficiency and low wear resistance, mechanical tuning of the Niva 4x4 engine is almost mandatory. Such work is called work to change the geometry of the power plant. You should start modifying the power plant by upgrading the carburetor. We do the following:

1. We change jets with an indicator of 1 kam to a jet with an indicator of 2 kam;
2. Renewing the accelerator pump nozzle.

If there is dirt or carbon deposits in the carburetor, we clean it manually. To do this we need a rag, gasoline and physical strength. If the dirt is very stubborn, a high-pressure cleaner or other device designed for washing the car will help. You can also use special “baths” to remove dried dirt from parts. In this way, the fuel supply to the gas distribution mechanism can be significantly improved.

Basic Solex malfunctions and methods for eliminating them

Before looking for problems with the device, you need to make sure that the ignition system is working flawlessly and is adjusted correctly. You also need to check whether the timing belt is functioning correctly, since malfunctions in the operation of this mechanism can also cause malfunctions in the carburetor.

Table 1. Classification of possible carburetor malfunctions and methods for eliminating them.

Refinement of the gas distribution mechanism

After replacing the jets and accelerator pump, you can proceed to the second stage of tuning the VAZ-2121 engine. It includes modification of the gas distribution mechanism (GRM), namely, an increase in the diameter of the valves with their subsequent sealing. Such tuning of the Niva 2121 engine will increase the power of the power plant by almost ten percent.

It makes sense to replace the pusher (with a new one with a diameter of at least 1 mm) during the modification of the Niva engine. Work is being done to increase the pusher wells of the intake and exhaust channels. The result of such modification will be especially good for the Niva 4x4.

Subsequent work concerns the replacement of injectors and the control unit itself. Tuning the VAZ-2121 engine will be incomplete unless the standard crankshaft is replaced with an advanced modification, which will significantly increase the power of the power plant. This is due to the increase in piston stroke. It is also recommended to replace the piston rings with new ones. When replacing the crankshaft, boring should be done, as this will provide an additional opportunity to make the engine more powerful. However, be prepared for the fact that fuel consumption will also increase.

Such tuning repairs are capable of:

• increase smoothness;
• reduce wear of parts;
• increase power.

The most common engine failures

ICE 21213 has typical problems of VAZ engines:

• increased oil consumption due to carbon deposits on valves and cylinders;
• the appearance of vibrations at a speed of 90 km/h. The cause is a damaged head gasket or an unadjusted carburetor;
• when the timing chain is pulled, the valve bends;
• Excessive noise due to a broken timing chain tensioner or timing chain tensioner shoe, pump bearing creaking, or unadjusted thermal clearances;
• Overheating of the unit is caused by a faulty thermostat, a clogged radiator, or prolonged operation at high speeds. Due to the design features of the BC, the thickness of the coolant layer does not provide sufficient cooling, so it is necessary to operate the unit moderately. Increased engine temperature leads to cracking of the cylinder head.

Similar article Technical characteristics of the Toyota 2AR FE engine

The disadvantages of the 21213 engine include repair features. If the wear of the cylinders exceeds 0.15 mm, then boring is permissible only for the repair dimensions of the pistons, increased by 0.4 and 0.8 mm from the nominal value. Exhausting the limit threatens to completely replace the pistons and cylinders.

Regrinding of the crankshaft journals is possible with a diameter reduction of 0.25; 0.5; 0.75 and 1 mm. The limitation is due to the repair dimensions of the liners. If the axial clearance of the crankshaft increases by more than 0.35 mm, the part must be replaced.

Oil pump work

Lubricant supplied through the oil pump extends engine life. To improve the performance of the oil pump when tuning the Niva engine, you need to take another pump and cut off part of the housing with the parting plane from it. The thickness of this “pancake” should be about 11 cm. Using milling, cut off the excess and leave a thickness of 10 mm.

Next, do the following to remove chamfers on the edges of the teeth:

1. We compress, that is, remove, the drive gears.
2. We trim one of the gears by 0.75 mm on each side.
3. We cut the second gear to 11.5 mm (after trimming).
4. We repeat the operation with the remaining gears (driven).

Let's start working on the body. To do this we do the following:

1. We release the driven gear axis from the housing.
2. We form a longer axis from the drive roller.
3. We insert the resulting axle into the body.
4. We press the narrow gear onto the second drive shaft.
5. Press on the wide gear.
6. We fix the wide driven gear in the housing.
7. We install a narrow gear into the housing.

This sequence will prevent the gears from turning relative to each other. You can also improve the oil receiver of the Vase by cutting it a centimeter from the bottom. After this, we adjust the end gap and connect the entire structure with bolts.

Instructions for adjusting the carburetor

Solex is a fairly reliable device, but it is advisable to carry out the necessary adjustments every six months of vehicle operation in order to optimize engine performance and save gasoline. These include: adjusting the quality of the fuel mixture, its level in the float chamber and the number of idle speeds.

Before carrying out any calibration work or troubleshooting, it is advisable to clean the carburetor of dust, oil and other contaminants. It is more convenient to do this with the air filter removed.

When adjusting the Solex carburetor installed on the Niva, you need to put the gearshift knob in the neutral position, start the engine and let it run for about five minutes. This will allow the fuel pump to fill the chamber. Then you should remove the fuel hose from the carburetor, after turning off the ignition. To prevent the gasoline remaining in the fuel line from leaking onto the engine, prepare in advance a container into which it can be drained. After this, dismantle the choke control cable and remove the screws securing the carburetor cover to its body. When removing the cover, you need to be extremely careful not to damage the gasket and fastenings of the floats.

Having gained access to the float chamber, it is necessary to measure the fuel level. It is convenient to do this with a caliper with a depth gauge. The distance from the edge of the chamber to the edge of the fuel should be 24-25 millimeters. If these values ​​do not correspond, you should bend the tongue on the float axis in the desired direction, put the cap in place, start the engine, and then repeat the procedure of removing the cap and measuring the fuel level.

The idle speed setting is carried out on a warm engine. First, use a flat-head screwdriver to tighten the mixture quality screw located on the base of the carburetor until it stops. It has a left-hand thread, so it should be screwed counterclockwise. Then you need to unscrew it five turns and start the engine. Having removed the choke (air damper), we make minimum but stable engine speeds by rotating the fuel supply amount screw. Then, slowly turning the quality screw, you need to achieve unstable operation of the motor, and after that, unscrew the quality screw one and a half turns. This is enough to restore stable operation. You can set the recommended rpm (850-900) using the quantity screw.

We will improve the exhaust system

Since the exhaust system can increase the power and efficiency of the engine, tuning the VAZ-2121 engine includes the installation of modern exhaust and intake manifolds.

With their help, the process of air supply and exhaust gas removal will be optimized, and the efficiency of the power plant will become higher. To increase engine power, it makes sense to install a resonator from the muffler. With it, exhaust gas removal improves, and the running engine acquires a beautiful bass sound.

Tuning the VAZ (Niva) engine also includes moving the muffler further to the rear axle, when almost the entire exhaust system is dismantled. In this case, the resonator can be installed from any car, for example, from a Moskvich.

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Niva with turbine

The most common way to add power to an engine is to install a turbine or compressor, which will significantly increase the volume of air entering the power plant.

Installing a turbine is not a complex tuning solution, since the turbine itself has a fairly simple structure. The supercharger and turbine impellers are mounted on the same shaft, and the exhaust gases are the drive. Thus, we can observe the most efficient use of energy from combustion products in a car. The absence of interaction between the crankshaft and the turbine shaft also increases the efficiency of the power plant.

In general, the Niva engine can and should be modified, and then your car will become more powerful and last much longer. This is what we should strive for!