Tuning the VAZ 2107 engine
What is engine tuning on the “seven”? After all, the factory power unit already contains all the necessary elements for stable operation of the car, how safe is it to carry out any modifications yourself? Perhaps these are the main questions that any VAZ 2107 owner asks.
The “Seven” initially has a design that can easily be modified and improved. Therefore, engine tuning, performed consistently and competently, can be considered a job that will not only increase engine power, but also make the car easier to control.
Engine tuning for a VAZ 2107 is a set of procedures aimed at improving the existing engine characteristics.
Depending on the owner’s capabilities and ultimate goals, car tuning options can be very different.
Cylinder block boring
The VAZ 2107 has heavy pistons, so boring the cylinder block greatly facilitates the operation of the engine. The essence of the BC modernization is simple: the engine will no longer have to compensate for the increased inertia due to the operation of heavy connecting rods and pistons, therefore, the entire resource will be directed to power while driving.
The best option would be to replace the piston group with a lighter one, but the cylinder block is not cheap, so most car owners resort to boring, that is, expanding the existing volume of the cylinder head.
It is very important to have practical experience of such work. Otherwise, you can almost certainly ruin the motor itself. It is important to know that they usually resort to boring the cylinder block on a VAZ 2107 if it is necessary to repair or optimize an old engine. Because only a specialist auto repair shop can properly perform this work.
Video: boring VAZ 2107 engine cylinders
Cylinder head modernization
The cylinder head (cylinder head) is one of the most important components of the VAZ 2107 engine. This unit is located in the upper part of the cylinder block itself. It is the cylinder head that is responsible for creating optimal operating conditions for the engine, since the combustion process of the air-fuel mixture occurs in it.
Therefore, car mechanics consider modification of the cylinder head to be one of the options for tuning the engine, which will expand its capabilities in terms of accelerating combustion processes.
The essence of this modernization is that the intake and exhaust manifolds will need to be machined. This is a difficult job, since the material used to make the collectors on the “seven” is cast iron, which is difficult to boring.
Procedure for modernization
The modernization of the cylinder head must proceed strictly according to the following plan:
Video: modification of the cylinder head on the “classic”
After all stages of work, it is recommended to blow out the cylinder head with a can of compressed air to remove dust and chips. If during the modernization process all actions were performed correctly, the engine power will increase by 15–20 horsepower.
Replacing the camshaft
The factory camshaft of the VAZ 2107 distributes power in approximately equal volumes at any speed. However, it is not optimized for low speeds, so for better performance, you can replace the standard camshaft with a shaft with a low phase, which will give quick closing of the valves and, as a result, more comfortable engine operation at low speeds. As opposed to a shaft with a small phase, you can choose a shaft with a wide phase - its work is aimed at providing advantages when the motor operates at high speeds.
The choice of a new camshaft is entirely the prerogative of the driver. Since the bottom shaft is good for towing or off-road driving. It is often installed by lovers of leisurely city driving. The top shaft gives clear advantages when overtaking - it is recommended to install it when tuning a car for sports.
Replacement procedure
You can replace the camshaft yourself. To do this, it is important to comply with the following operating regulations:
Tuning “classics”
As already mentioned, the VAZ 2107 has quite good sporting characteristics. However, its basic configuration still does not allow it to adequately compete with other common models. And in this situation, of course, revision in all its manifestations helps. If you only need to change the appearance of the car, then styling and tuning of the interior are usually used without serious intervention in its technical part. Styling may include the installation of air intakes on the hood, forged or cast wheels with low-profile rubber tires, installation of “advanced” optics (lensed headlights, tuned fog lights, etc.), neon lighting under the bottom, body shaving. You can often find glass tinting and the installation of tuned side mirrors. In general, everything that will allow you to create an aggressive, sporty look.
Interior tuning often includes the installation of foreign car seats, universal sports seats (or “buckets”), power windows, a tuned steering wheel, etc.
This type of tuning will allow you to create the desired style. But this will not affect the technical characteristics in any way. To obtain high results on the sports track, technical tuning is used. Traditionally, it includes engine tuning, both minor (increasing and polishing the channels of the original engine, installing a lightweight flywheel, installing a 4-throttle unit or a sports receiver with an enlarged throttle valve, about 52-56 mm, and a zero-resistance filter at the fuel inlet). and a more thorough set of measures (determining the installation of cylinder blocks from Niva, which makes it possible to obtain gains in engine volume of up to 1.7-2.0 liters and crankshaft stroke (long-stroke shafts with a diameter of 84, 86 and 88 mm are used, as a rule). And so on - right up to the complete replacement of the original engine with an engine from a VAZ 2112. From it you can get an “evil” aspirated engine by using the above-mentioned receiver.
Suspension tuning - installation of stiffer shock absorbers, sports springs (an option with or without lowering is possible), a front double stabilizer, etc. Those who are planning to modify the transmission should be prepared to install a driveshaft on CV joints, and the possible installation of a ceramic clutch etc. It wouldn’t hurt to “pump” the steering system (the original car has some problems with this unit) - install an electric or hydraulic booster on it.
Compressor for VAZ 2107
Another way to increase the power of a power unit is to install a compressor. This device will help pump fuel, which, in turn, will invariably entail an increase in the power characteristics of the engine.
Most car owners recommend installing a compressor of a certain brand, namely PK05D, since this particular device has the characteristics that are optimally suited for the VAZ 2107. An important factor will also be considered that the installation of PK05D does not imply its introduction into the piston group of the “Seven” engine. In addition, the compressor operates surprisingly quietly, so the driver and passengers will not experience discomfort while driving.
To install a compressor on a VAZ 2107, you will need to perform a number of actions:
According to various estimates from car owners, installing the PK05D can significantly improve the handling of the “seven”, as well as significantly increase power when climbing hills, overtaking and acceleration.
Varieties of engine tuning options
To improve the traction characteristics of the “seven horse”, it is not at all necessary to take it to a car mechanic; many actions can be performed independently, without spending a lot of money, without causing a serious hole in the family budget.
Of course, every car enthusiast who decides to take such actions really wants to know what mechanisms will be affected and what tuning the VAZ-2107 engine will consist of. A carburetor, an injector, a cylinder block - this is only a small part of what can be done to increase traction.
However, it is with such actions that it is recommended to begin your practical journey related to improving the performance of your own car.
Refinement of the cylinder head
The cylinder head is an undeniable part of the engine of any vehicle. It is located on the upper surface of the block itself. It is she who creates the conditions for the engine to operate, carrying out the combustion process of the fuel mixture.
For this reason, car mechanics strongly recommend paying attention to this device, to the capabilities that it confidently stores.
From the point of view of capabilities, the cylinder head can be considered as the widest springboard where you can perfectly “turn around”, introduce multiple technical ideas, thereby improving the technical characteristics of the engine itself.
Refinement of the BC head consists of grinding manifolds of two types: intake and exhaust. Such actions cannot be called easy; you will have to sweat and tinker seriously, since you will have to work with cast iron, which is by no means a malleable material.
If you do not give up, but take the recommended actions, all your efforts will not be in vain, and you will be able to enjoy obvious improvements.
First, remove the cylinder head, clean it thoroughly, since on its surface there will definitely be residual fractions from burnt fuel and old dilapidated gaskets.
You can clean the head using chemicals or gasoline, which you always have on hand in the garage. It’s good if you have a drill, you can attach a brush to it and use this “handy” tool to carefully walk over the entire surface of the head. This cleaning option will be of the highest quality, and is therefore recommended by most car owners.
Now each part will be modified separately. Initially, efforts are directed towards constructive improvement of the reservoir. The first step is to clean and polish it. The polishing process should continue until the internal diameter of the hole reaches 32 cm.
This process will be carried out quickly if you have special cutters. If there are none, you can use a drill, wrap a rag around it and attach sandpaper.
After achieving the designated goals, the polishing process continues, but now in places of contact with such an important device as the carburetor.
Next, at the junction of the intake manifold, it is easy to find a transition slightly protruding above the surface; this is what needs to be removed. Such actions favor the acceleration of the penetration of fuel into the chamber, where its direct combustion occurs.
First, you will need to use a drill with sandpaper wrapped around the indicated area, and then remove the sandpaper and use only the drill to finally cut off the bushings.
The next process must be accompanied by pinpoint precision, since the channels located next to the saddles must be polished. They must not be damaged.
At this point, the actions with the manifold are completed, ensuring an improvement in the gas intake and exhaust mechanism, which helps to increase the engine power by at least fifteen “horses”.
Compressor installation
You can also increase the efficiency of fuel injection, and, accordingly, increase engine power, if you install a compressor on your “seven”.
Most car mechanics recommend purchasing a PK05D compressor for this purpose, since it has acceptable characteristics, and its installation does not involve insertion into the piston group, which facilitates performing tasks with optimal ease.
This compressor operates much quieter, and accordingly, the “seven” engine will also operate almost silently.
In connection with the decision to implement such a compressor, some parts in contact with it will have to be replaced. In particular, you will have to replace the generator, water pump and crankshaft. You can borrow a poly V-belt from a Chevrolet Niva.
Now that all the mechanisms have been purchased, you can begin to directly implement the new compressor. You need to act according to the algorithm recommended by experienced auto repairmen.
First, we carry out the dismantling process sequentially:
- remove the generator belt;
- remove the air filter;
- We remove all fasteners that secured the removed parts.
Next, we begin to mount the pulleys, which were borrowed from the Chevrolet Niva, after that we install the brackets, the compressor itself, and after it comes the turn to install the alternator belt.
Place a special fitting on the compressor inlet and secure the filter. The pipes are mounted in the same way only at the outlet. Next, it is important to connect the valve to the pipe and install the flange in the carburetor.
The carburetor and, of course, the compressor have fittings that should be connected with a blue hose. Secure all connections as securely as possible using clamps. Finally, all that remains is to adjust the tension of the generator belt.
Finalization of the BC
The “seven” has heavy pistons, but if light analogues are installed instead, the engine efficiency increases. This is not difficult to explain, since the engine has to compensate for the increased inertia resulting from the operation of heavy connecting rods and pistons.
By installing lightweight analogues, engine balancing increases. In addition, car owners can safely expect a significant reduction in friction.
You can effectively increase the performance of the engine by expanding its volume. Such an increase can be obtained by boring the BC, but such actions require practical experience.
Otherwise, you can simply ruin the engine, so they resort to boring the BC only when it is necessary to repair old engines, for which there are only two options: either take a risk, bore the BC and give it a new life, or go straight to the landfill.
Injector installation
If you install an injector on a VAZ-2107, the engine power will also increase, so those owners of “Sevens” who initially had a carburetor installed are ready to make the effort and install the injector with their own hands.
First, efforts should be made to properly place the components in the engine compartment. It is rational to place the ignition coil below the vacuum, since in this place the vibration force is minimal, and in the same way the temperature does not reach high values, without causing overheating of the parts. In this regard, the service life of the ignition coil can be increased only by proper placement.
Next, install the electric fuel pump by connecting it to the side member or to the fuel tank. To make such manipulations easier, you can use Volga kits.
We draw a wire that we will later connect to the control unit.
It’s simply impossible to get an adapter for the incoming fuel pressure regulator, and you won’t be able to use an analogue from another car either, so you’ll have to turn to a turner for help who can build such an important part.
Now all the hoses are installed in the tank, except for the vacuum tube, which is soldered to a special pad. Next, we install the speed sensor, a nut for the lambda probe, and lay out the wires for the electrical wiring in sufficient quantity so that a shortage of wires does not cause problems later. Injectors with a ramp, filter and hoses are subject to mandatory rinsing as a complete assembly.
Now you must remove the ignition and all mechanisms oriented to it. The next step is to carefully drain the antifreeze.
You will have to file all the inlet channels to ensure they have an ovoid shape. Next, the holes should be prepared for connecting new manifold studs, along with the channels through which the antifreeze will subsequently be drained.
Finally, all that remains is to install the manifold, then the ramps, injectors, receiver, all throttles, hoses and pipes, and connect all the sensors.
This completes the modification of the VAZ-2107 engine with the installation of an injector. The owner can immediately evaluate the improvement in the performance of the engine of his “seven” after completing all technical actions.
Based on the algorithm described above, we can conclude that tuning the VAZ-2107 engine and installing an injector with your own hands requires increased attention and effort, however, any car owner can perform all these actions if he has a strong desire to improve the engine and increase the maneuverability of his own car.
You can safely brag about the result of the work done to your friends, expecting well-deserved praise.
After such work, you will be able to make sure that your “seven” has turned into a real swallow, overtaking cool foreign cars with amazing ease. And even if your “old lady” has been competing with her for many years, some “automotive youth” will definitely not be able to compete with her. It will be very difficult to catch up with you, in any case, you will definitely have to sweat.
16-valve engine for the "seven"
The VAZ 2107 is equipped with an 8-valve power unit from the factory. Of course, one of the easiest tuning methods is to replace it with a 16-valve engine. Traditionally, the engine from the VAZ 2112 is chosen, since it is almost identical in size to the engine from the VAZ 2107 and meets all the requirements for power and efficiency.
Installation of a 16-valve engine on a “seven” is carried out according to the following algorithm:
Video: installation procedure
A 16-valve engine instead of an 8-valve is the best option for those drivers who want to feel quick feedback from their actions while driving, optimize engine power and the resource of the entire car as a whole.
Thus, any type of tuning of the VAZ 2107 engine can turn the car into a faster and more durable model. However, when performing any type of work, you must adhere to regulations and safety precautions; otherwise, it is better to contact experienced specialists.
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Tuning the carburetor VAZ 2107
To improve the performance characteristics of their “iron horse”, owners in most cases attempt tuning. Tuning “classics” has become a habit among many Russian drivers - after all, it is almost always possible to improve both the ride quality and the appearance of the car without large financial investments.
Tuning the VAZ 2107 carburetor is one of these opportunities. Often, when modifying a carburetor, tuning the entire power unit is not required, which can be considered a significant saving when working with an old car.
Carburetor tuning is needed for several reasons:
It is worth noting that the car owner can perform most of the procedures with his own hands - of course, if he has practical skills in servicing the car.
Options for modifying the standard VAZ carburetor
There are two main options for independently modifying the carburetor, which is installed on the “seven” by the factory. The advantage of any of them is obvious - you do not need to buy a new carburetor. However, the owner must know the design of the standard device well in order to be able to competently carry out modifications.
Constructive modification
Structural modification is considered one of the most common ways to “mobilize” all the strength of an old carburetor. This is how the problem of engine power is solved - immediately after modification, the driver will feel dramatic changes in the car’s power traction.
Structural modifications can only be carried out on a carburetor removed from the vehicle. It is recommended to first clean the device body from dust and traces of gasoline.
Modifying the design of the carburetor on the VAZ 2107 involves performing the following actions:
At this point, the minimal structural modification of the carburetor on the VAZ 2107 can be completed. However, experienced car owners also recommend replacing the jets - both air and fuel. This will provide the carburetor with more stable flows of the two components of the emulsion (gasoline and air), especially if you install jets with a higher throughput (1-2 sizes larger than the standard ones).
The work performed will not only increase engine power, but also save on fuel consumption. Although in some cases, as car enthusiasts note, replacing springs with wires does not allow the dampers to close on time, which can lead to increased gasoline consumption.
Video: work process
Tuning when using a repair kit
The use of a carburetor tuning repair kit is suitable for those cases when the driver is no longer satisfied with the operation of the power unit - slow acceleration or loss of power when driving uphill. At the same time, the cost of a conventional repair kit is low, while the effect of its use can be felt immediately.
Installing an injector instead of a carburetor with your own hands
We could not ignore such an important and sensitive issue, which can greatly increase the power of the 7 engine and please its car enthusiast. Below are approximate instructions with all the operations for switching from a carburetor to an injector in a classic. It is worth saying that everything described below is quite suitable for other engines of the classic VAZ family.
So, you have the entire kit in your hands and therefore we arrange it around the periphery of the engine compartment. 1. Place the ignition coil or module under vacuum. The fact is that this is the best place where there are low vibrations and less heating, which will ensure long-term operation of the equipment.
2. Install the front cover under the crankshaft position sensor (214 or 2123 to choose from). If you decide to try the second option, you will have to raise the fan a little higher. 3. We install the electric fuel pump on the side member or directly into the fuel tank. We recommend using the Volga kit. Don’t forget to connect the positive wire to the control unit, which we will install later.
4. You need to make a special adapter for the fuel pressure regulator from any turner you know. Now you can tuck all the hoses into the tank. Leave the vacuum tube.
5. We solder the fuel return pipe tightly to a special pad by drilling and also using soldering acid. 6. We install a speed sensor, which is characterized by a 6-pulse operating mode. It's easy and simple to do. 7. We mount the hub nut under the lambda probe by welding. 8. Now let’s estimate the length of the electrical wiring so that all the necessary wiring is supplied with a reserve. We process all the tips with a soldering iron and tinning. 9. We wash the injectors with the ramp, all the hoses and the filter. We do this procedure together. 10. Remove the standard ignition and everything connected with it. 11. We drain the antifreeze, and also install a tee under the pump and a coolant temperature sensor. 12. We make the inlet channels with a file so that their shape resembles an egg-type roundness. We put foam rubber or rags in each of the channels so that the chips do not get inside.
Read, it may come in handy: The sound signal does not work on the VAZ 7 model: diagram, repair, how to make a pneumatic horn
13. Drill holes and cut threads for new manifold studs. 14. We make a 10x1.5 thread and plugs with the same thread for a flat-head screwdriver. These will be the antifreeze drain channels. 15. Install a new manifold with a gasket adjusted to the shape of the channels.
16. Now we install the ramp and injectors, as well as the receiver. We also install the throttle, idle air control, TPS, inlet hose and breather pipe. 17. We connect all sensors.
Here are the main operations we considered. Of course, it’s a little superficial, but the algorithm will be clear to you. Of course you will have to tinker, but the effect is worth it.
Installation of a sports modification
Not all owners of “sevens” know that the Dimitrovgrad Automotive Accessory Plant, in addition to standard equipment, also produces sports versions of carburetors.
Thus, the VAZ 2107–1107010–07 “Solex-Sport” carburetor is considered just such a version, capable of giving the car significant acceleration. Its main advantages are that significant improvements have been made to the design of the installation:
Thus, the “Sport” modification allows you to use all the power capabilities of the engine. However, fuel consumption will be approximately 10% higher than when driving with a standard DAAZ carburetor.
The process of installing a sports carburetor on a VAZ 2107 is no different from installing a standard one - after all, the manufacturer made sure in advance that the new device has the same dimensions and connectors for connections.
The traditional installation diagram looks like this:
However, not all car owners believe that it is advisable to install a Solex sports carburetor on the “seven”.
you stupidly buy a Solex 21073 from a Niva 1700 and don’t need anything else. rework will require only 200 rubles. and not as they ask for 5800 rubles - this is a scam for suckers. acceleration dynamics can be improved with virtually no significant increase in fuel consumption. and not like these Solex Sport
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"Pseudo-turbocharging"
They say that this method greatly improves dynamics due to the increased amount of air entering the carburetor. To do this, change the heated air supply hose attached to the air filter. So, choose a similar hose diameter, but a longer length, and then lead it to the radiator, closer to the fan. Thus, air will flow into it in a direct flow and without turbulence, passing through the radiator.
True, there is one circumstance due to which many car owners refuse this procedure. The fact is that with the position of the hose described above, a lot of dust and debris gets there, and, as a result, they freely pass through the radiator honeycombs and accumulate in the air filter in very large quantities. Considering that not all debris is retained by the filter, all the “rubbish” penetrates the cylinders. The result is increased piston wear. However, if you don’t mind the “engine”, make such a “pseudo-turbocharging” in your “seven”! By the way, everyone praises him very much.
Carburetor from a more powerful car
When choosing a carburetor from a more powerful version of the VAZ, you should keep in mind both the engine size and its service life. The carburetor must always match the power unit, otherwise the fast and easy ride that the driver hopes for will not work.
So, on the “seven” you can install more powerful carburetors from the “Niva”, “Lada Priora” and other VAZ models, but installation will require some modifications in terms of fastenings and connections, since the carburetor bodies have a different structure.
Experienced VAZ 2107 car owners do not recommend installing carburetors from imported car models on the car. Such work will take a lot of time, and imported installations are several times more expensive than domestic ones. And the desired result may not appear for one simple reason - some minor mistake was made during the installation process.
Therefore, it is advisable to either simply buy a new domestic carburetor, or install two carburetor units on the VAZ 2107 at once.
Cylinder dimensions VAZ 2107
The engine of a VAZ 2107 car consists of a cylinder block, the minimum diameter of which is 76 (mm), the maximum is 82 (mm).
Basic dimensions of VAZ 2107 cylinders:
The cylinder is one of the main parts of an internal combustion engine, which converts the energy of the combustible mixture into the energy of piston movement.
The engine cylinders are combined with the upper part of the crankcase into a cylinder block, which ensures engine strength and reduces its weight.
Cylinder parameters for all modifications of VAZ 2107:
- Number of cylinders: from 2 to 4;
- Number of valves per cylinder: 2;
- Cylinder diameter: from 76 to 82 (mm);
- Piston stroke: 80 (mm);
- Compression ratio: from 8.5 to 9.4.
Important: as a rule, the materials for making cylinders for this VAZ model are cast iron and aluminum.
Other names:
The 4-door VAZ 2107 sedan was exported under the names Lada Nova, VAZ 2103, VAZ 1500, Lada Riva, Lada Signet, Lada 1500.
years of production of all modifications of the model: 1982-2014.
How to install two carburetors on a VAZ 2107
Two simple standard DAAZ carburetors will give the car more power. In addition - and this should be emphasized - two carburetors working in pairs significantly reduce fuel consumption. It is this factor that is extremely relevant in our time, when gasoline prices are rising every month.
It is recommended to install two carburetor units in the following cases:
The installation process is best carried out in a car repair shop, as the work is considered difficult. If you make a mistake, you can damage the power unit.
To work you will need the following tools and parts:
In addition, it is better to stock up on various auxiliary materials in advance: hoses, tees and antifreeze.
Operating procedure
The installation of two carburetors on a VAZ 2107 begins only after the antifreeze has been completely drained from the system and the old carburetor has been removed:
Video: two carburetors on a “classic”
In most cases, the carburetors will need to be adjusted to ensure they perform the same.
On the VAZ 2107 you can use different types of carburetors. However, when tuning yourself, do not forget that the best equipment of the car is what is installed at the factory.
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How to increase engine power on “classic” VAZ models
The VAZ 2101, 2103-06 or Niva models, well known in the CIS, are usually called “classics”. The power units on these machines are carburetor and today are very outdated, however, given their prevalence, there are many who want to modify these internal combustion engines.
The result may be boosting the engine to 110-120 horsepower. There are even examples with a power of about 150 hp. (depending on the quality and depth of modifications). In this article we will look at how to increase the engine power of a VAZ classic.
Increasing the displacement of the VAZ engine
As you know, one of the most important parameters in relation to internal combustion engines is the working volume. The engine’s power, throttle response, etc. depend on the volume of the engine.
It is more comfortable to operate a more powerful car, since the reserve of torque and power allows you to not “turn” the engine too much, since acceptable traction appears at lower speeds.
When it comes to increasing working volume, there are two main ways:
- change the diameter of the cylinders;
- increase the piston stroke by replacing the crankshaft;
These methods are actively practiced for tuning AvtoVAZ serial engines, which are found under the hoods of different models. More precisely, we are talking about the very first engine on the “penny” 2101 with a power of 60 hp. or the “eleventh” engine 21011, and the VAZ 2103-06 power unit with a power of 71-75 hp. Also, do not forget about the carburetor 80-horsepower 1.7 liter engine on the Niva model and other modifications of the above-mentioned internal combustion engines.
Let's get back to tuning. To perform modifications, you can use both serial parts and special elements for tuning. In the first case, the total cost of modifications will be noticeably cheaper, since serial parts are easier to find and cheaper to buy.
So, let's look at a specific example. If you have a VAZ 2101 engine, you can bore the cylinders to 79 mm, and then install pistons from the 21011 engine. The working volume will be 1294 cm3. To increase the piston stroke, you need to have a crankshaft from 2103 so that the stroke is 80 mm. Then you will need to purchase shortened connecting rods (by 7mm). As a result, the volume will be 1452 cm3.
It is quite obvious that if you bore the cylinders and at the same time increase the piston stroke, the end result will be a “penny” engine volume, which will be 1569 cm3. Note that similar operations are carried out with other motors on “classic” models.
Please note, regardless of the block, it is not recommended to bore cylinders larger than 3 mm, as the risks of severe thinning of the walls and reduced service life, as well as damage to the cooling system channels, increase significantly.
It is also important to consider that after installing a different crankshaft and increasing the piston stroke, the compression ratio increases, which will require the use of gasoline with a higher octane number. Additional adjustments to the compression ratio may also be necessary. The main thing is to choose the right shortened pistons, connecting rods, etc.
We also add that the simplest and cheapest method can be considered boring for repair pistons. However, even if the block is bored to the last repair size, the volume increases by no more than 30 “cubes”. In other words, you shouldn’t count on a significant increase in power in this case.
Other engine modifications: intake and exhaust
If you take into account the recommendations of experts, in order for the engine to turn out to be resourceful, you should not strive to increase its volume beyond the 1.6 liter mark. An increase in volume above this figure will mean that the engine becomes “heavier” and spins less intensively.
The next step will be to upgrade the exhaust ports and valves. The channels are polished and the valves can even be replaced. For example, a suitable option is selected (it can also be from a foreign car), after which the valve stems are processed to the dimensions for a VAZ engine.
The valve plates should also be processed at the same time. It is important to adjust all valves according to weight. Separately, it is worth approaching the issue of installing the camshaft. In order for the engine to pull well from the bottom and at high speeds, it is optimal to select a camshaft that provides high valve lift. At the same time, a split gear is also required for precise adjustment of the valve timing.
