How to improve the VAZ 2114 engine 8 valves injector

It's no secret that in its standard, that is, in serial form, the engine does not develop all the power it is capable of. You can configure the firmware in a new way, but you won’t be able to significantly change the load curve without reducing the environmental class. You can buy a "racing camshaft" to install in place of the stock one. But then the firmware will have to be changed to accommodate the new phases... Let's consider what happens if we use only accessible tuning methods. Let's say right away that on the VAZ-2114 hatchback the increase in power can be 20% or even 25%, and we are talking about only 8 valves. There is no need to bore the valve channels.

Let's leave illusions in the past, and for this we watch one video.

We increase the power of the 8 valve VAZ-2114 engine with our own hands - myths and reality

Let's leave illusions in the past, and for this we watch one video.

Cylinder block boring

This option involves expanding the diameter of the cylinders and installing pistons of larger diameter, which in turn also increases the working volume. Any major overhaul, a kind of small tuning, in the direction of increasing volume. With the right approach, and hands growing from the right place, they can be bored up to 84 mm. Further boring is dangerous, casting defects may appear, and then you can go for a new block. But there are also limitations and disadvantages here.

A significant reduction in the thickness of the cylinder walls will, in any case, lead to a small but reduced service life of the cylinder block. The thermal load also increases; in other words, thin walls will heat up much faster.

An example of increasing the power of a VAZ-2114 engine

During the tuning, the 2111 (1.5 l) engine was modified.

Boring of seats along the internal diameter, which is equivalent to enlarging the valve;

Valve seats, VAZ 2111 engine

Our new engine remains “not plug-in” - the valves do not reach the pistons. When tested on a bench (the sensors were turned off), the result was not impressive.

Checking without adjusting the ECU

If you install the engineering firmware, you can select the parameters “from start to finish.” And then the picture looks better...

Torque graph after tuning is completed

All sensors, including the lambda probe, were connected in the latter case. We managed to get 96 “forces” at 5300 rpm!

How not to increase power!

Do not attempt to bore channels. This operation can be performed in the absence of ball cutters, but in garage conditions nothing will work even with cutters. The bottom line is that the accuracy of the cutter installation is important - the error should not exceed 1-2 microns.
As you can see, on the stock VAZ-2114 hatchback the increase in power was 24%, and this is without installing a “chandelier”, “improved exhaust” and other expensive elements.
There is no point in buying a “racing camshaft” without having the appropriate tuning firmware.

Crankcase ventilation

Let's do one more thing. There are small and large crankcase ventilation. The big one works when the throttle opens and begins to suck out crankcase gases. But they enter the engine already burned, gases escape from the pistons. With such ventilation, the engine is still clean, since unpleasant gases are sucked out. We will do the crankcase ventilation the same way we did it the old fashioned way.

You just need to vent the gases down under the car so that they don’t go into the cabin, otherwise it will stink. Then the engine will always consume fresh fuel mixture. Our car is ready.

What to do with engine 11183?

It is clear that a mandatory step in tuning the 11183 engine will be replacing the ECU. It’s simple: the standard M74 block cannot be flashed, but “January 7.2” is a good and time-tested solution. You will also have to abandon the “E-Gas” option, which means replacing the throttle assembly and receiver.

Everything I had to throw away

The intake tract parts were borrowed from the 2111 engine. A cable pedal was installed, and the engine began to look human.

Everything works well with the “January” controller, but standard firmware is not an option if the camshaft has been replaced. And it, in turn, has the following parameters:

Release phase width – 104 ;
Intake phase width – 109 ;
Opening angle at outlet – 272 ;
Inlet opening angle – 268 ;
Valve travel (exhaust/intake) – 9.5/10.1 mm.

After installing the new shaft, the motor became plug-in. However, on the 2114 hatchback, increasing power almost always comes with a compromise. In this case, we had to sacrifice reliability. What's improved:

Maximum torque increased by 14 N*m ;
The power also increased – the limit of “90 horsepower” was passed.

By the way, any tuning leads to a decrease in durability. Make a choice.

Features of the 2111 (1.5i) engine power system

Location of elements of the 2111 (1.5i) engine power supply system in the engine compartment:

1 - receiver; 2 — vacuum supply hose to the fuel pressure regulator; 3 — throttle assembly; 4 - fuel rail; 5 — fuel pressure regulator; 6 — air supply hose to the throttle valve; 7 - adsorber; 8 — air filter; 9, 10 and 11 — hoses of the crankcase ventilation system; 12 — throttle valve drive cable; 13 — diagnostic fitting

Read more: The difference between Largus and Largus cross

combined with the fuel level indicator sensor into a single unit -

(often called an electric fuel pump). The pressure pump delivers fuel from the tank through the fuel filter to the fuel rail.

Engine Fuel Module 2111 (1.5i):

1 — fuel level indicator sensor; 2 — connecting block; 3 — inlet pipe; 4 - outlet (discharge) pipe; 5 — module cover; 6 — module cover guide; 7 - electric fuel pump in a plastic casing; 8 - intake chamber

Fuel rail for engine 2111 (1.5i) complete with injectors:

1 — diagnostic fitting; 2 - fuel rail; 3 — fuel supply tube to the fuel rail; 4 — fuel pressure regulator; 5 — tube for draining (draining) fuel into the tank; 6, 7, 8 and 9 - injectors

Fuel pressure control

installed on the fuel rail. Excess fuel is returned to the tank through the fuel return line.

Engine power supply system diagram 2111 (1.5i):

1 - nozzle; 2 - fuel rail; 3 — diagnostic fitting; 4 - adsorber; 5 - check valve; 6 — throttle assembly; 7 - gravity valve; 8 — safety (two-way) valve; 9 - separator; 10 - filler pipe; 11 — fuel filter; 12 — fuel drain line; 13 — fuel line hose connecting the outlet pipe of the fuel module to the fuel filter; 14 — fuel module; 15 — fuel tank; 16 — fuel line connecting the fuel filter to the fuel rail; 17 - fuel pressure regulator

Method for increasing the power of an 8 valve engine with a split gear

The split, that is, adjustable gear was not used in the last project. It is better to install it on “non-plug-in motors”. Setting method:

The moving and fixed parts are marked with a mark, the same as on a standard pulley;
Installation is carried out in the usual manner, aligning the crankshaft and timing mechanism according to the marks (as when replacing a belt), you should also remember about the correct tightening torque of the belt;
If in the 4th cylinder the intake and exhaust valves are not open “to the maximum”, we carry out an adjustment: loosen the outer screws, and, holding the outer part of the gear, set the camshaft correctly. Tighten the fixing screws.

Split gear with retaining screws removed

Large R/S effect:

PROS: Allows the piston to remain at TDC longer, which ensures better combustion of the fuel mixture, i.e. more complete combustion of the fuel mixture, higher pressure on the piston after passing TDC, higher temperature in the combustion chamber. The result is good torque at medium and high speeds. A long connecting rod reduces friction of the piston-cylinder pair, and this is especially important during the working stroke of the piston.

CONS: A motor assembled with a sufficiently large R/S value does not provide good filling of the cylinders at low and medium engine speeds due to a decrease in air flow speed (due to a decrease in the piston speed after TDC, at the moment the intake valve opens). There is a high probability of detonation due to the high temperature in the combustion chamber and the long time the piston remains at TDC.

Source

Tuning parts, popular and not so popular

We have arranged all the elements in order of increasing uselessness:

Receiver with increased volume.

1000-2500

Receiver with increased volume (shorter path)

Tuning throttle assembly

As for the exhaust tract, you can install a “4-2-1 spider” - it creates a vacuum in front of the valve that is not yet open... Torque and power are improved from this, the question is by how much.

Any “tuning” begins not with the engine, but with the selection of “gear ratios”... This advice is common, and it also applies to the VAZ-2108 and 2114 families.

Source

The main mistakes made when tuning

Many people try to add power to the engine, but at the same time make typical mistakes. The leading ones among them are:

installation of cutters in garage conditions (this work requires high precision);
use of unnecessary and expensive spare parts;
lack of suitable firmware for a sports camshaft or other elements.

Before buying expensive spare parts, you should pay attention to the recommendations of the specialists. They created a list of useless components:

A receiver with an increased volume is good only at medium and high speeds, but for work in the range from 1000 to 2500 rpm, a standard spare part is more preferable.
A zero filter, called a “chandelier,” is a fairly useful addition, but you will have to constantly clean it with special chemical compounds. This will increase the cost of maintaining the car.
A throttle valve of increased diameter does not increase power too much, since the engine always has enough air.

How to increase the power of an 8 valve VAZ 2114 engine with your own hands

Many young car enthusiasts are thinking about how to increase the power of an 8-valve VAZ 2114 engine with their own hands. They do this because most often they buy a car with a weak engine due to lack of money. They are counting on increasing capacity. Tuning cannot be done on some old domestic engines. But the VAZ 2114 8-valve is suitable for tuning.

Therefore, next we will consider what can be done with the engine to increase its power.

General information about the VAZ 2114 engine

The VAZ manufacturer has released three models of the 2114 engine. These are:

A power unit with a volume of one and a half liters and 8 valves.
A power unit with a volume of 1.6 liters with the same number of valves as the first.
And a sixteen-valve engine with a volume of 1.6 liters.

On the roads you can most often see a car with a second modification engine. However, it is distinguished from the first model in terms of power by the added four horses. It's not that much.

Before a major overhaul, the VAZ 2114 engine can run 150 thousand kilometers. And this is with respect to it, when changing filters and oil once a year. Many people do not wait for major repairs and do tuning earlier. Other car enthusiasts do tuning immediately after purchase.

Attention! But tuning is different from tuning. Many people think that budget tuning will help increase power without spending large amounts of money. However, there is no such word as budget tuning. In any case, you will have to buy a turbine to increase the engine power. And this is expensive.

Specifications

The technical characteristics of the VAZ 2114 engine are quite typical for the 2113-2115 series of cars. In addition, this power unit is developed on the basis of the “eight” engine, which has declared itself to be reliable and easy to repair. The car was produced from 2001 to 2013. During this period, the vehicle received five valuable power units.

VAZ 2114 engine structure

As was said earlier, the 2114 was equipped with five different power units, which differed in power and valve mechanism. Three of them had 8 valves, and the other two had 16. The gas distribution mechanism had a belt drive. Until 2007, the engine was equipped with a simple on-board computer, which did not regulate the operation of the engine based on sensor readings. Therefore, the motorist had to regulate the processes the old fashioned way, manually. Since 2007, an ECU was installed, which, receiving data from sensors, independently adjusted many processes.

Design features of the engine.

Since the second generation had a so-called two-way electronic engine control unit, it is worth considering what electrical circuit was installed.

Electrical diagram of a VAZ 2114 car.

How to increase engine power

To make the correct engine tuning, you need to choose one of several ways to modify the power unit. There are four types of engine modifications that will not cause harm to the latter and will not reduce the life of the engine.

cylinder boring;
installation of a new air filter device;
turbine installation;
chip tuning or electronic modification of the engine's brains.

You also need to take into account that as the engine power increases, fuel consumption will also increase. Therefore, before you decide to tune your engine, think about whether you need increased fuel consumption.

Increasing the volume of engine chambers

Let's consider the first method of engine tuning - increasing power by increasing the volume of the combustion chamber. To do this, the diameter of the cylinders is bored, and the surface is carefully ground to a mirror finish. The procedure is carried out on a special machine.

They replace regular pistons with forged ones, and the rings with lighter ones. Replace the connecting rods that connect them to the crankshaft.

Experienced mechanics recommend replacing oil injectors if forged pistons are installed. This is necessary for good oil cooling to occur. Since old injectors become unsuitable for further operation.

Installing a new air filter

To properly tune the engine, install an intake filter with reduced aerodynamic resistance. This ensures that air enters the mixer with the least effort. As a result, power increases by four horses.

Attention! In this case, fuel consumption is reduced, which has a beneficial effect on the car owner’s wallet.

Tuning by installing a new air filter is done as follows:

Grind the internal intake channels.
They install receivers.
Change the throttle valve to a new one with a larger diameter.

A direct-flow muffler is installed at the exhaust. All work is carried out in service centers. Under no circumstances should boring channels be carried out in a garage.

Turbocharging installation

Engine power is increased by installing turbocharging. Despite its great efficiency, many car enthusiasts do not dare to take this step due to the high financial costs. Installing a turbocharger requires contacting specialized workshops.

First of all, you need to choose a turbine suitable for the VAZ 2114 engine. There are two types of this device:

low pressure turbocharger. By installing such a compressor, there is a chance to increase power by 15 percent. However, you will have to tinker with installing such a device;
high pressure turbocharger. Increases power by 30 percent.

Another point why car enthusiasts do not dare to install turbochargers: the life of the engine is reduced. Since the motor is operated at full power at all times. Wear on parts increases and the engine heats up.

Therefore, you need to install a good engine cooling system. Under no circumstances should you pour water into it, as many car owners like to do. Always use antifreeze to cool power units.

Tuning the gas distribution mechanism

By tuning the gas distribution mechanism, you will not harm the VAZ 2114 engine. In addition, the 8-valve engine will reduce fuel consumption. And the power will be increased.

To tune the engine timing, do the following:

Bore the valve seats.
The intake and exhaust valves are changed to lightweight ones.
The bushings are also changed to light ones.
Install the split gear. But it must be configured correctly so as not to subject the engine to major repairs.

Next, let's look at what needs to be done with the split gear to increase the power of the motor.

Split gear method

To make the correct adjustment of the split gear, you need to set the piston to a point called TDC. To lower the speed or bring the speed to an average speed, make the gas-dynamic boost angle smaller and increase the angle of the opening exhaust valve.

To increase speed, the shaft is turned in the opposite direction of rotation of the crankshaft. In this case, the angle of gas-dynamic pressurization becomes larger.

There is another type of increasing the power of a domestically produced power unit. This is chip tuning. Specialists are involved. To improve engine tuning, the electronic engine control unit is reprogrammed. This is done using equipment called a programmer.

Experienced mechanics advise carrying out chip tuning in specialized workshops.

Air intake

Now let's go to the hardware store. We bought a corrugation with a diameter of 80 mm and a silicone hose with a diameter of 16 mm. Let's make a cold intake system. Unscrew the standard air filter. We put the corrugation on the lower pipe and tighten it with a clamp. We pull it out from below and make a cold air intake from the street. We cut off the excess corrugation. Now we collect everything, put the air filter in place.

Some skeptics say that this way you can snatch the water hammer during the rain. Now the cold air intake is located low, you can drive into a puddle and scoop up water. But this can be easily avoided. It is necessary to make drainage holes at the lower points of the corrugation.

How does the VAZ-2114 engine work?

The main feature of this type of engine is the presence of an injection system. The engine is four-cylinder, with two valves (intake and exhaust) on each of the cast iron cylinders.

Several types of engines were installed on the VAZ 2114. The 8-valve engines that can be found on this car model include:

VAZ-2111 - its volume is 1.5 liters, maximum power is 78 hp, maximum torque is 116 Nm.
VAZ-21114 – 1.6 l, power 80-84 hp, maximum torque – 125 Nm.
VAZ-11183 - 1.6 l, maximum power 81-82 hp, maximum torque - 132 Nm. This type of engine is also available with 16 valves, but we are considering an 8-valve one.

The service life of the VAZ-2114 engine, according to the manufacturer, is 150 thousand km. With careful handling and modification of the engine in a safe way, this resource can be extended.

In order to improve the power and other performance indicators of the engine, it is necessary to modify it - tune it.

How to increase engine power

There are various ways to modify a VAZ 2114 8 valve engine at home. They can be used either separately or in combination, depending on the desired result.

Increasing the volume of engine chambers

There is a direct proportional relationship between engine size and power. The most popular option for the VAZ-2114 is to increase the volume from 1.5 to 1.6 liters. (or from 1.6 liters to 1.8 liters depending on the specific engine model). To increase volume, you need:

install a lightweight crankshaft;
replace the pistons with forged ones and replace the piston rings with lightweight ones;
change the connecting rods that connect the pistons to the crankshaft;
increase the diameter of the cylinders and grind the surface (this is done to increase the number of crankshaft revolutions).

As a result, the engine power increases by about one and a half times. But this also increases fuel consumption.

It is also necessary to replace the oil nozzles - forged pistons require oil cooling. And in the process of boring parts, old injectors become unusable.

Installing a new air filter

To increase engine power, an intake filter with reduced aerodynamic drag is used. As a result, air enters the mixer with less effort. This can add an additional 5-8 horsepower to the engine. At the same time, fuel consumption is reduced.

To tune the intake system, you need:

polish the internal intake channels (done in car repair shops);
install receivers;
install a throttle valve with a larger diameter.

The exhaust system is also modernized by installing a direct-flow muffler.

Important! Boring and grinding of intake channels should not be done at home. This work requires increased precision, so it is better to contact a specialist for this.

Turbocharging installation

This is one of the most effective, but at the same time costly, methods for tuning the 2114 engine. The increase in engine power depends on the type of turbine used:

low pressure turbocharger – increases engine power by 15%. This is the least labor-intensive option for installing a turbine;
high-pressure turbines - increase engine power by 25-30%.

If a turbine is installed on a VAZ-2114, there is a high probability of premature exhaustion of the engine's life. This is due to the fact that all working elements wear out ahead of schedule.

Tuning the gas distribution mechanism

This method does not lead to early exhaustion of the engine's life and allows to reduce fuel consumption. To increase engine power, it is necessary to reduce the timing resistance and optimize its phases. Necessary:

bore the valve seats;
replace the intake and exhaust valves with lightweight ones;
you can change the guide bushings to lighter ones;
install the split gear and adjust it properly.

The most important element in timing belt tuning is the split gear. It is this that optimizes the valve timing.

The adjustment should be made at the moment when the piston is at its highest dead center - TDC. It is first necessary to adjust the position of the camshaft.

For lower and middle speeds, you need to reduce the angle of gas-dynamic boost and increase the opening angle of the exhaust valve. To adjust the gear, you need to turn the camshaft as the crankshaft rotates.

For high speeds, the camshaft should be turned in the opposite direction relative to the crankshaft stroke. Thus, the angle of gas-dynamic pressurization increases.

What is this?

Engine overhaul refers to the work of a master aimed at returning the engine to a state as close as possible to its original state. In this case, most of the nodes are changed or restored. This type of repair is resorted to when there is a lot of wear on the parts of the unit.

The list of work may include grinding the crankshaft journal and camshaft, installing new pistons and springs, and honing the cylinders. If too many engine components are faulty, then it is more advisable to completely replace it.

The following signs indicate that it is time to overhaul the engine on the VAZ-2114:

The appearance of red, black or dark gray carbon deposits on the spark plugs.
Increased oil consumption.
The occurrence of knocking in the engine.
Increased fuel consumption.
The appearance of smoky exhaust.
Bad traction.
Engine overheating.
At idle, the engine runs unevenly.
Reduced power.

Major repairs proceed approximately according to this scheme:

Preparing the engine for dismantling (disconnecting wires, hoses, gearbox).
Removing the engine.
Removal and inspection of the cylinder head.
Disassembling the unit for diagnostics and cleaning.
Block boring. Grinding the crankshaft. Application of hone to the cylinder walls.
Weight distribution of connecting rods, pistons.
Block assembly.
Restoring the head (replacing caps and guides, straightening seats).
Assembling the engine and installing it in the engine compartment.
Connection.
Functionality check.