Boosting the VAZ 2106 engine

Many motorists have wondered how to increase the power of the VAZ 2106 engine. Since the design features of the power unit are quite simple, the process of modifying the engine is also not complicated, and a motorist with average knowledge of the design can handle it. But, before you start describing the process itself, you need to know what technical characteristics the 2106 engine has.

Specifications

The VAZ 2106 engine has standard technical characteristics that are inextricably linked with all representatives of the “classic” line. If you look from a design point of view, then all VAZ 2101-2107 internal combustion engines on a carburetor basis are similar to each other. Before proceeding directly to the modification, let’s consider what technical characteristics the power unit labeled 2106 has:

Names	Characteristic
brand, model	VAZ 2106
Type	Gasoline with the possibility of installing LPG
Injection system	Carburetor
Power	81 hp
Number of cylinders	4
Number of valves	8
Fuel consumption	10.5 l/100 km
Cylinder diameter	79 mm
Cooling system	Liquid, with forced fan

The device of a simple injector

The simplest car injector includes:

Sensors;
Electric fuel pump;
Controller (ECU);
Pressure regulator;
The actual injector (nozzle).

Sensors are needed to measure parameters such as:

Air mass;
Throttle position;
Air temperature;
Fuel consumption;
Crankshaft position.

The ECU is the brain of the fuel injection system. It checks the injectors according to a specific algorithm, processes signals from sensors and performs the necessary calculations.

The electric fuel pump forces gasoline to the pressure regulator, which maintains constant pressure in the system.

The injector is a solenoid valve that is activated when control voltage is supplied from the ECU. The moment the injector opens determines the amount of fuel and air supplied to the combustion chamber. The fuel assembly feed channel of the injector is designed in such a way as to ensure effective atomization and distribution of the mixture in the cylinder.

Power increase

Increasing the power of the VAZ 2106 engine is carried out in several stages. Of course, you can catch up on power characteristics superficially, but if we talk about full-fledged tuning, then it is worth understanding that the power unit is subject to modification entirely. This process takes more than one hour or day, so you should be patient. Why is it worth increasing the power of the engine - of course, with boring.

Boring

The VAZ 2106 power unit is bored on a special boring stand. But first, it’s worth deciding on the spare parts that are installed in the cylinder block. The best recommendation is the 82mm piston group from API.

At the same time, the pistons are 160 grams lighter than standard ones, which reduces the weight of the power unit. So, for these pistons you will need sets of oil scraper rings, also produced by this company.

As for the crankshaft, it is worth understanding that in order to achieve maximum power effect, it should also be replaced. Of course, the part itself costs a lot, so most car enthusiasts who perform tuning on their own leave the old crankshaft.

But, nevertheless, if the motorist decides to go all the way, then you can install a crankshaft, which is offered by the Polish manufacturer DDT. It is worth understanding that it must first be sharpened before the first repair, since the main journals will not fit into the yokes.

Another modification is the replacement of the camshaft and valves. The inlet and outlet valves can be purchased from API, but the seats for them will have to be machined using standard ones. The camshaft can be installed new, natively produced, or a lightweight one from DDT.

Ignition installation

The next stage of improvement is the installation of contactless ignition. Today, it can be easily found in any automobile market at an affordable price. Thus, you will have to replace not only the lock, but also the spark plugs, as well as the ignition coil and high-voltage wires. In this case, the best and most budget-friendly cables are those from Tesla.

Coolant circulation system

The cooling system should also be replaced. At the same time, it changes completely. There are several companies that produce tuning kits for cooling systems for classic VAZ cars. These include such well-known manufacturers as Mastersport, Brembo, AWD, Intenzo and others.

The cooling system tuning kit consists of:

High power water pump (in some cases can be found with a forced electric activation function).
Thermostat.
Set of silicone cooling system pipes.
Aluminum radiator with increased area.
Electric fan.
Coolant system sensor with wiring.

If you install such a kit, the engine will be better cooled even at high speeds, which will protect the engine from overheating.

Carburetor

As a rule, to increase power, an additional carburetor is installed on the VAZ 2106. This is done in order to increase the amount of fuel in the cylinders, but it does not do without additional air injection.

Riding ramparts

The top shafts allow the engine to maximize its performance at high speeds. Installing such an element will allow you to shift the “red” speed zone, thereby allowing the engine to produce the highest torque in this range. This is achieved thanks to wider and more powerful cams on the shaft. They push the valves much better and open them more and longer than cams on a classic shaft. At the same time, the engine will exhibit unstable operation at idle speed. The problem is solved by reprogramming the electronic ignition system controller. If a “sports” camshaft is installed, the ignition system will also have to be replaced with more modern equipment.

Conclusion

Upgrading and increasing the power of a VAZ 2106 engine is quite simple, so even a car enthusiast without technical education can cope with this procedure. There are several options and ways to modify the power unit. So, it all starts with boring and ends with replacing the air filter. All of the above recommendations will increase the power of the power unit by 50-80 horsepower.

Sometimes the engine power becomes insufficient for a VAZ 2106 car owner, then the question arises: how to boost the VAZ engine?

A simple and effective method of creating forced modifications is to increase engine power by increasing the displacement. This method is quite often used in the production of serial engines of transitional models, for example, the development of the VAZ 2106 engine based on the 2103 engine.

Since it is not possible to increase the number of cylinders, a possible solution to this problem is to increase the piston stroke and cylinder diameter. However, in order to increase the piston stroke, the crankshaft will need to be replaced, so increasing the cylinder diameter is considered simpler. This is achieved by using a repair size piston group. In the future, to increase the working volume, a piston group of a different model is used. Please note that this will require boring the seats for the liners, as well as processing the sealing surface of the head gasket to ensure the required degree of compression.

Increasing the compression ratio is one of the simple methods that allows you to boost the VAZ engine. Modern engines have this indicator at the level of values typical for sports modifications. Remember that the thermal efficiency of the engine will depend on the compression ratio. This figure increases rapidly as the compression ratio (e) increases to 12

13. After exceeding e=13, the efficiency increases much more slowly. It should be noted that as the compression ratio increases, detonation appears due to the fact that at the end of the compression stroke the temperature of the working mixture increases. The filling factor can be increased by using multiple carburetors. It is recommended to use one carburetor per cylinder. And in order to increase the filling coefficient in an injection engine, other methods are used, which will be discussed below. Often highly accelerated engines are equipped with direct-flow carburetors. But this will inevitably lead to increased fuel consumption, so this modification method is unprofitable for daily use. Other ways to increase the filling factor are to use a cylinder head with four valves per cylinder, as well as to reduce the loss of the speed of movement of the combustible mixture in power supplies, in the valve gap and intake pipes, and by cleaning the cylinders from processed gases. The magnitude of such losses is directly proportional to the speed of the mixture squared, so it is necessary to increase the flow sections of the intake tract on a forced engine. In addition, larger diameter valves should be installed, valve lift should be increased and valve timing should be expanded. Note that the inlet pipelines must have smooth bends, expanded flow sections, and high cleanliness of the internal surface. Inconsistencies between channels at the pipe connection points are absolutely unacceptable, otherwise turbulence will significantly reduce the flow speed.

Carburetor vs injector

A faulty injector is much more difficult to fix than a carburetor. You need to connect to the controller, and for this you have a special program. Otherwise, you will have to go to a car repair shop and pay for it. The injector consists of several parts distributed under the hood. In addition, the quality of the fuel plays an important role. A large number of sensors requires large wiring. Sometimes the injectors become clogged or the solenoid winding burns out. Interference and interference affecting the wiring distorts the signals, so where it is laid plays an important role.

Undoubtedly, the injector accurately doses the mixture into the combustion chambers and prepares it with the required composition. Fuel economy in this case is natural. Also in winter the car starts better; you don’t need to frequently adjust the idle speed. The car becomes more responsive and powerful.

The carburetor can be repaired almost to the knee. It is easy to remove, disassemble and reassemble. If you don't have a source of compressed air nearby, you can blow it out with your mouth using a hose. If you have the appropriate knowledge, adapting will not be difficult.

Install an injector or leave a carburetor at your discretion!

Description of common actions

Increasing power is a whole set of measures aimed at increasing engine power in VAZ 2106 and 21063 models without causing harm to the unit. It should be noted that if the complex for “boosting” the VAZ 2106 engine is completed completely, then modernization of the brake system will inevitably be required. Let's consider simple technical tuning activities.

Installing a zero resistance air filter. This operation does not increase engine power. Installation of this part facilitates the operation of the unit, releasing some of the energy that was spent on overcoming the resistance of the standard filter.
Replacing a conventional muffler with a direct-flow muffler produces the same effect. The only difference is that gas flow resistance is eliminated at the exhaust. Together with the previous operation, installing direct flow gives a noticeable increase in engine power. The disadvantage is increased noise from the exhaust system.
Installing an electronic ignition system will ensure stable operation of the unit, and good sparking will contribute to better and more complete combustion of fuel in the cylinders.
Polishing the internal surfaces of the intake manifold will also reduce the resistance to the flow of the mixture of fuel and air, and the unit will “breathe deeply.”
Replacing a carburetor has its own nuances. If you have a standard DAAZ 2105 or DAAZ 2107 carburetor, then it is better to replace it with a Solex from a VAZ 2108 with an engine capacity of 1.5 liters. On older “sixes” there are Weber carburetors with forced opening of the secondary chamber. They are completely repairable and it does not always make sense to change them, since these carburetors are structurally capable of working with an engine of increased power.

Of course, to get the desired effect from the changes, your car’s engine must be in good technical condition. By completing all the points on this list, you are guaranteed to experience an increase in engine power.

16-valve engine on VAZ 2106

One of the options for tuning the “six” is replacing the 8-valve engine with a 16-valve engine, for example, from a VAZ 2112. However, the whole process does not end with a banal replacement of engines. Quite serious, painstaking and expensive work lies ahead. The main stages of this type of modification are:

For a 16-valve engine we install an injection power system.
We adjust the mount on the engine mounts (classic mounts are used).
We change the crown on the flywheel, for which we knock down the old one, and in its place we put a part from a VAZ 2101 with preheating. Then we grind off the collar on the engine side of the flywheel (you will have to turn to a lathe). This is necessary for the starter to fall into place. After finishing work on the flywheel, we balance it.

From the listed points for installing a 16-valve unit, you can understand and preliminary assess your capabilities both financially and technically. If you do not have the necessary components and knowledge, you will have to seek outside help and “pour” additional funds into this type of hobby.

Measures to refine the power unit

Over time, many car enthusiasts want to get more from their car and are thinking about the question of how to boost the engine of a VAZ 2106. How to ensure that the power on a VAZ 21063 is equal to that of a “pure six”? Let us remember that boosting an engine is an increase in power by increasing its displacement and compression ratio. This requires deeper technical tuning; disassembling the engine is indispensable. Here is a list of measures that will allow you to boost the VAZ 2106 engine and give a significant result (an increase of up to 110 hp and more).

Milling the cylinder head over the entire plane to a thickness of up to 1 mm. As a result, the combustion chambers of all cylinders are reduced, the compression ratio increases, and subsequently the engine power. You must understand that after such an operation it will not be possible to drive on fuel with a low octane number, at least 95. When using such gasoline, the combustion process in the chamber will significantly accelerate, detonation will occur, an impact on the piston, piston pin, and so on. Detonation significantly accelerates engine wear and can lead to serious damage.
Installation of a sports modification camshaft. It will ensure increased valve lift and high-quality filling of the cylinder with fuel.
Boring of cylinders for piston size 82 mm. Make sure that the sleeve wall will allow this operation.
Installing lightweight forged pistons and connecting rods and a lightweight flywheel will free up even more engine energy, which it spends on internal resistance.

Concept

How does an injector work?

The word “injector” comes from the Latin word “Inicio,” which means “to throw out.” Essentially, an injector is a pump that pushes out liquid or gas under pressure.

The VAZ injector is an injector controlled by an electronic unit (ECU.

To supply the required amount of fuel assemblies into the combustion chamber of each cylinder, it is necessary to know the mass of air and fuel. To do this, appropriate sensors are installed on the car, the signal of which is sent to the ECU.

Features of modification of 1.3 l units

There is a modification of the VAZ 21063, the power of the unit is significantly lower. The reason is the standard 1.3 liter engine, which is quite fixable. In modification 21063, engine power can be increased in the same ways as for the “pure six”. However, it will still not be possible to achieve the same power; the difference in the working volumes of the units is too big.

It is quite possible to increase engine power in modification 21063 by increasing the displacement. To do this, you need to purchase a new crankshaft from a VAZ 21213 Niva and a set of special shortened pistons and connecting rods. It is better to entrust the installation and adjustment of these parts to a specialist who has already performed such an operation. Result: in the VAZ 21063 model, power will increase significantly. This will happen due to a significant increase in the piston stroke.

You should pay attention to the following point: when increasing power in the VAZ 21063 model by replacing the crankshaft, it is not recommended to mill the cylinder head. The fact is that after installing a new crankshaft on the engine in question, the compression ratio will increase and a switch to 95-grade gasoline will be required. If you want to further increase engine power in modification 21063 by milling the head, the compression ratio will increase again, resulting in a switch to 98-octane gasoline.

All modifications that increase engine power on the VAZ 2106 and 21063 models inevitably lead to an increase in fuel consumption, since in both cases the working volume of the unit increases. Therefore, in everyday driving you should neglect simple rules for saving fuel and use the full resource of your engine wisely and thriftily.

How much does it cost to bore an engine?

Each motor has its own resource.
The internal combustion engine of a car can travel more than one hundred thousand kilometers without major repairs. And then depending on your luck. It all depends on the make of the car, on how it was driven. One way or another, boring of the main engine elements will be required, if possible. We'll talk about which elements later (of course, first of all, these are the cylinder block and the crankshaft). For now, we note that engine boring, most often in VAZ cars, is necessary when:

Compression in several cylinders has decreased significantly;
the motor just jammed;
they want to boost the engine, that is, modernize it.

The most important point: boring worn out cylinders, and especially the crankshaft, cannot be done independently, without machine tools. If somewhere else they try to bore the cylinders from a motorcycle with a good drill, then there’s nothing to say about a car in this regard! A profile machine is required, as well as a specialist with a high level of qualifications.