VAZ 2112 engine - modification methods

Easy tuning of the VAZ 2112 engine

VAZ 2112 engine modification is the most important, responsible and serious stage in tuning. From the factory, cars are equipped with standard engines that have average characteristics that meet the standard and requirements of the average consumer. To improve the performance of their favorite car, improve its dynamics and increase engine power in the VAZ 2112, owners resort to thorough engine tuning. Although the history of VAZ2112 cars is not yet rich at all, compared to other VAZ models that have become classics, this car model is becoming a favorite in the hands of folk craftsmen. Currently, there are many methods for modifying VAZ 2112 engines, more than half of which can be done independently, the rest require the help of specialists.

Tuning the VAZ 2112 engine

This is the most important, responsible and serious stage in tuning the VAZ 2112. All production cars are equipped with standard engines that have average characteristics that correspond to the average consumer.
In order to change the characteristics of your car, improve dynamics and increase power, you cannot do without thorough engine tuning. And although the history of the VAZ 2112 brand is not yet as rich as that of other VAZ models that have already become classics, this car has become a favorite among folk craftsmen.

There are several methods for refining and improving the engine that you can do yourself:

Model features

The car with an improved engine was named VAZ 21124. It became an active fighter against environmental problems. As for the start of the car, it began to feel traction at low speeds. The engine began to work more moderately and calmly, and strong surges disappeared. Often, owners of engines with 16 valves are concerned with the question of what to do to prevent their elements from bending. For owners of 21124, this problem is not relevant due to the presence of sports shafts and holes in the length of the piston that control the lifting process. As for the knocking and noise of the VAZ 21124 engine, it should not scare you, since it is completely normal.

The main task of any driver who wants to be modern is to tune the VAZ 21124. It involves improving both the external and internal design features. Restyling the exterior of a car involves installing body kits on the bumper, sills, as well as doors and hoods, which will give the car individuality, make it look stylish and sporty, and at the same time increase the aerodynamic characteristics of the car. To make the car more sporty, you will need to replace body elements with materials such as plastic. Plastic parts help reduce the weight of the car, which makes it easier to drive on the roads. The final touch will be the purchase and installation of sports tires along with new wheels.

Increase in working volume.

This method is perhaps the most convenient and simple, and therefore widespread. This will increase engine torque without changing your driving style. This can be done in two ways: increasing the piston stroke and boring the cylinders.

An increase in piston stroke is achieved by installing a new crankshaft with a large eccentricity and selecting connecting rods and pistons for it. Connecting rods, as a rule, are selected by weight and, mainly, lightweight options are installed. Because Since the piston is a key part in every engine, by replacing the piston group you can significantly increase efficiency and power. To top it off, a lightweight flywheel is installed. These operations will lead to a reduction in the load on the clutch and crankshaft, which will speed up acceleration and increase the dynamics of the car.

Boring cylinders is a slightly simpler method. It is based on the fact that engines, as a rule, have a certain margin of cylinder wall thickness. From this we can conclude that the cylinders can be bored out, slightly increasing the volume by grinding down the walls. This will immediately increase engine power, because... Bored cylinders will begin to burn more fuel per unit time. Boring is carried out only on special equipment, as in the photo:

Gasoline supply

I think there is no need to explain the importance of maintaining a stable, constant gasoline pressure in the injector rail:

During normal city driving, the standard fuel regulator is sufficient at high speeds, but a situation arises that with the injectors constantly open, it leads to a general decrease in pressure in the rail
As a result, the fuel supply decreases, poor atomization results, and engine malfunction
Therefore, boosting the engine requires increasing the pressure by 0.5 - 1 atmosphere, it all depends on the degree of boosting the engine
Naturally, it will be necessary to adjust the injection program to ensure the correct mixture composition
Today, in the latest (so-called “transitional”) models, as well as new 1.6-liter engines, a drainless system is used; the RTD is located in the tank with the fuel pump assembly and creates a higher pressure of 3.8 Atmospheres

Injectors

A natural process when, when boosting the engine, a situation often arises that the performance (amount of fuel supplied) is simply not enough:

In this case, you will need to replace the nozzles, install more efficient ones, or install a second row of nozzles
Option two is quite difficult and time-consuming, and it is not always possible to implement it even in a standard block.
Therefore, it is easier to install more efficient injectors, having a productivity from +15% to +50% (and it is undesirable to use publicly available injectors used on GAZ cars; apart from high productivity, they have no more advantages)
The disadvantages are the speed and non-linear characteristic at the beginning of its range, where a regular car has XX
In addition, as a rule, 4-2-1 “spiders” are installed on souped-up cars, which work well in a wide speed range
Spiders of the 4-1 system did not take root in civilian tuning due to the narrow range of their effective operation
And the principle of operation of the exhaust is based on the vacuum created in front of the closed exhaust valve, this contributes to improved purging of the cylinder

The most important thing when carrying out tuning is a professional approach, in addition, care when performing all operations. Because not every driver understands all the intricacies of engine operation, so it is better to entrust the tuning of the car to experienced professionals. Since this will protect you from inevitable mistakes typical for beginners during tuning, it will help save time and money. Additionally, watch a video on the tuning you are interested in.

Source

Increasing the compression ratio.

The essence of the concept of “compression ratio” is the ratio of the volume of the cylinders to the total volume of the combustion chamber. By increasing the compression ratio, you can significantly increase engine power and efficiency and at the same time slightly reduce fuel consumption

This is achieved by installing a new camshaft with different geometric parameters. The new camshaft will increase the volume of the combustion chamber without increasing the volume of the engine itself, which has a beneficial effect on its efficiency and power.

It is advisable to carry out this procedure in parallel with other engine modifications, for example, with the installation of turbocharging. It must be remembered that using an engine with a self-increased compression ratio will require the motorist to use high-quality fuel and engine oil.

Otherwise, the engine may begin to stall, and the temperature may begin to exceed the permissible limit. You can increase the compression ratio to 9.7 - 10.

Lightweight valves

Installing lighter than standard valves ensures that the valve closes quickly with a spring. For this purpose, expensive light alloy valves are used. This method of modernization provides greater efficiency and normalization of valve timing at high speeds.

When tuning valves, you can install upgraded valves with a special shape of the disc profile.

Sometimes, instead of using light alloy valves, the valve plates are simply lightened. Less weight requires less camshaft effort to operate. Reduced weight rockers can be used in conjunction with lightweight valves. This will give even more advantages when using the machine at high speeds.

A similar effect can be achieved by installing more powerful valve springs. The valves also begin to close more quickly, but this solution has its drawback: stronger springs place additional stress on the camshaft, reducing its durability.

Chip tuning

This is perhaps the most modern method. It is efficient and relatively simple. Its essence lies in reconfiguring the engine control unit, due to which it is possible to improve some of its characteristics without the risk of subsequent repairs.

During chip tuning, the standard software is replaced with sports software, developed, for example, for the VAZ 2112 16 valve engine. First, the controller program is read from the engine control unit via sensors. This program is then modified taking into account engine reserves and characteristics.

Special companies and car services specialize in these works and have the necessary software and human resources, because This requires experience and appropriate engineering skills.

Finally, the reconfigured controller program is written to the vehicle's control unit. The advantages of this tuning are accessibility and relative simplicity. It also excludes the situation when repair of the VAZ 2112 engine is required, because its mechanical part is not affected.

Perhaps the only drawback of this type of tuning is a slight decrease in the environmental friendliness of the exhaust.

An exhaust manifold

This system is designed to improve the release of exhaust gases. People call this system “spider”, and there can be mainly two options: “4-1”, “4-2-1”.

It is advisable to install the exhaust system after working with the gas distribution mechanism, pistons, “nulevik” or chip tuning. Single-purpose installation of this system will not bring the desired results.

Turbocharging installation

This is the most common and effective type of tuning. The power characteristics of a car depend fundamentally on the amount of air and fuel, the mixture of which is ignited in the cylinder. In order to increase engine power, you need to supply more fuel to the cylinders.

But to increase the volume of fuel, you will definitely need to increase the volume of air, which, in fact, is what the turbine is intended for. The exhaust gases pass through the turbine impeller, rotating it, and it also drives the compressor. The compressor pumps air into the cylinders.

The air is forced under pressure, therefore, compared to naturally aspirated engines, more air is supplied. It is the increase in the volume of air pumped into the cylinders that leads to an increase in the amount of fuel burned, which significantly increases engine power.

But it is worth remembering that installing a turbine will most likely require modifications to the cooling system. Video with examples of installing turbocharging on another car of the VAZ family - VAZ 1209:

CEILING COVERING

The material from which the ceiling covering in the VAZ 2112 is made gets dirty very quickly. Over time, a dark spot appears on the ceiling, directly above the driver's seat. Similar spots appear above the heads of passengers (but, as a rule, later). Re-upholstering the ceiling covering on your own is not an easy task. But finding a reupholstery specialist is not easy, plus his services are not cheap. So VAZ 2112 owners do it simpler and simply paint the ceilings of their cars using universal paint in spray cans (to paint the ceiling of a “two-wheeler” you need 6 of them).

SEQUENCE OF OPERATION

Painting the ceiling directly in the salon is not an option. First, the coating must be dismantled.

The ceiling covering in the VAZ 2112 is held on by 10 screws and 13 plastic latches located around the perimeter. To remove the screws, use a Phillips screwdriver. The latches are opened manually.

The material of the ceiling covering on the VAZ 2112 gets dirty very quickly

The removed covering is removed from the passenger compartment through one of the rear doors (to do this, the covering will have to be slightly bent).
The selected paint is sprayed from a can onto the ceiling covering (no preliminary primer is required - the universal paint is well absorbed into the material).
After painting, the ceiling needs to be dried. It takes 6-8 days for the smell to completely disappear. Drying is carried out only in the open air.

The coating needs to be dried in the open air for 6–7 days.
The dried coating is installed back into the interior.

Installation of "nulevik"

This is what is commonly called an air filter with low resistance. It is designed to reduce resistance in the intake system and thereby increase the throughput of the filter, thereby achieving a slight increase in power. These filters differ from standard filters in their high throughput.

Tuning a VAZ 2112 engine requires a professional approach and care during all operations. Not every motorist understands the intricacies of engine operation, so it is advisable to entrust your car to experienced professionals. This will save you from inevitable mistakes during tuning and save a lot of time.

Installation of a zero resistance filter

A zero-resistance filter, or simply “zero filter,” is mounted instead of the air filter and its housing. It is designed to reduce the resistance of incoming air into the system. Large filter throughput allows you to increase engine power by a couple of percent. Remember that the correct choice of filter and impregnation for it is the key to proper engine operation.

This tuning is one of the most affordable.

Channels and valves

The exhaust and inlet channels are supposed to be ground , increasing the diameter at the inlet, and not changing the diameter at the outlet. We remove all irregularities and various joints that can in any way slow down the flow.
Valves - it is better to use special lightweight or increased diameter ones. It is also expected to use the stiffest or sportiest springs, as well as lightweight valve plates.

The difference between the lightweight valve (left) and the regular one.

Improved internal characteristics

Also, VAZ 21124 tuning will include changes inside the car. Auxiliary components are installed in the cabin, and old ones are modernized, for example, power windows, sports seats, airbags, and a steering wheel. The car will become more luxurious if you reupholster the doors, change the armrests, interior handles, and wooden pockets. Modern tuning offers us a wide selection of materials that can be used to make up the ceiling, various options for door cards, as well as leather substitutes in various designs and colors.