Every owner of a VAZ “classic” at least once dreamed of modifying the engine of their car, making it more powerful and responsive. The desire is justified by many objective reasons, of which three main ones can be distinguished:
- the engine power is not enough to overtake long vehicles and trucks on the highway in conditions of limited visibility;
- the “Seven” engine is not one of those that allows you to beautifully break away from the flow of cars at a traffic light;
- the owner of a car sometimes wants to put his technical knowledge into practice and create some kind of “exclusive”.
The first reason is especially important - sharp acceleration can save lives if an oncoming car unexpectedly appears on the highway.
Therefore, tuning the VAZ 2107 engine is quite popular among fans of this model.
Camshaft replacement
The standard camshaft of the VAZ 2107 distributes power approximately equally throughout the entire speed range. To improve power at low speeds, you can install a low-phase shaft, which closes the valves faster. A wide-phase shaft that opens the valves strongly gives an advantage when operating at high speeds.
Therefore, the market offers several camshaft options for tuning the VAZ 2107 engine: top, bottom (lower) and universal shafts.
Installing a low camshaft is convenient for those who often tow or simply do not like to “crank the engine” to high speeds. An overhead camshaft is needed for those who are used to maintaining high engine speeds. It starts working after 3200 rpm, but at low speeds the engine thrust weakens and fuel consumption increases. Therefore, such a camshaft is used only for specialized sports tuning.
Modification of the cylinder head of the VAZ 2107
The cylinder head (cylinder head) is a separate part of the engine, which is mounted on top of the cylinder block and ensures the operating cycle of the engine. In fact, part of the combustion process of the working mixture takes place in it, as well as its supply and exhaust gases. Agree, the function is quite important, and there is a large springboard for certain improvements.
Refinement of the cylinder head includes grinding of the intake and exhaust manifolds and coaxial placement of holes. You will have to work with cast iron - it is difficult, but the game is worth the candle.
Initially, you need to remove the cylinder head. We will not touch on this topic and will consider it in another article. After the part is removed, it must be thoroughly washed and solid fractions of burnt materials, as well as gasket remnants, must be removed. For these purposes, use gasoline, kerosene or thinner. If you want, you can use special chemistry. If you wish, you can attach a brush to the drill and walk along the surface of the cylinder head - this will be an ideal option.
To complete the work you will need the following set of tools:
1. Drills 2. Flexible rod 3. Drill with adjustable spindle speed 4. Roller cutters 5. Set of sanding papers 6. Rags 7. Measuring tool (calipers) 8. Exhaust valve and a set of washers for it 9. Lubricant 10. Tekes
We begin the procedure by modifying the collector. Having previously removed it, we clamp it in a vice, after which we wrap a rag around the drill, and on top of it a special piece of sandpaper for cleaning.
Let's start polishing the manifold. You need to remove enough wall material to get a hole diameter of about 32 cm. Those who often do tuning have at their disposal special cutters that do this much faster. However, at home you can get by with what we indicated. After completing this procedure, we recommend polishing the manifold in the area of the seating plane under the carburetor. A brush and drill are ideal for these purposes.
Next, we will carry out work to remove the protruding transition, which is located at the junction of the cylinder head and the intake manifold. This will speed up the flow of the combustible mixture and air into the combustion chambers. First, we’ll determine which area needs to be ground off, so we’ll screw all the studs into the cylinder head. Lubricate the area on the intake manifold and put it on the studs. After this, a specific trace of lubricant remains.
Initially, we go through a drill with sandpaper so that the valve fits. After this, it works further into the reservoir. When we get closer to the guide bushings, we need to roll up the skin and also file them down a little.
When all the channels have been passed and the bushings have been sawed off, we proceed to polishing the channels from the side of the saddles
. You need to be very careful to avoid damaging the saddle. This is where you might need a cutter that needs to be inserted into the drill. It is important that in front of the saddle the channel remains slightly wider than the rest of it.
In principle, for manifolds, these are all procedures that will help improve the intake and exhaust of gases. The procedures are the same for both the intake and exhaust manifolds. The only difference is the material of the part. The fact is that cast iron is cast iron, and it is more difficult to process, but still some craftsmen manage to process it.
Thus, you can get a power increase of about 10-15 horsepower, which is quite a lot for starting work. Let's move on.
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.
Installing an injector on a VAZ 2107 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.
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.
Increasing cylinder diameter
Such modernization requires special equipment and the work of a qualified specialist. Boring the cylinder and replacing the pistons with parts with a larger diameter allows you to get a significant increase in power. However, such tuning is usually used only on an old engine with worn out inner surfaces of the cylinders.
Installing a compressor on a VAZ 2107 carburetor
Installing a compressor on the seven is an opportunity to increase the efficiency of pumping hot mixture and accordingly increase engine power. The most popular compressor that car enthusiasts and craftsmen install on the VAZ 2107 is the PK05D which will be discussed. Why him? It’s just that its characteristics meet the most optimal ones, namely: excess air pressure is only 0.5 bar and this is achieved at 6200 rpm. In addition to this decisive characteristic, there is another fact in favor of this compressor - when installing it, you do not need to interfere with the design of the piston group, which means that installation is extremely simple.
Installing a compressor on a VAZ 2107 carburetor with your own hands is quite possible without the intervention of specialized craftsmen. Naturally, first, you should familiarize yourself with some of the features of this procedure, as well as know the sequence and order of actions. If you are worried about the benefits of a compressor, then believe me, it has been used for these purposes in sevens for a long time and during this time it has undergone several significant improvements that have made it even better and naturally more efficient. The latest innovation is a significant reduction in the noise characteristics of the unit, so the supercharger operates almost silently.
PC05D consists of two main elements that deserve your attention and understanding. The first is a centrifugal device
, and the second is
a high-speed multiplier
. A special feature of the compressor is that there is no need to service it, and the mechanism is driven by a poly-V-type belt from the engine crankshaft.
In designs of this kind, the multiplier is made on the basis of bearings, which should be replaced after a run of about 50 thousand kilometers. The same goes for the belt, because it is also subject to a certain amount of wear and tear, which goes without saying. It is important to understand that for normal operation of the compressor on a VAZ 2107 carburetor, you need to ensure the supply of antifreeze
(antifreeze) or
motor oil
. We have already said above that there is no need to change the design of the power unit, but you still need to replace the generator shaft, crank pulley and water pump. The fact is that now they will use a serpentine belt, rather than a regular one. Where can I get such a strap? Experiments have shown that the Chevrolet Niva is quite suitable. We took measurements, and after installing the compressor, the increase in car power was about 50 percent.
Benefits obtained by tuning an injection engine
Tuning the injector helps to unlock the full potential of the car engine. The improvement in engine performance is due to the following factors:
- portions of supplied fuel become more accurately dosed and depend on the engine operating mode;
- reducing the proportion of unburned gasoline in the exhaust leads to a decrease in environmental pollution;
- increasing the speed of reaction to pressing the gas pedal;
- Sensitivity to engine load allows you to supply the optimal amount of fuel;
- increasing engine efficiency as a result of complete combustion of a portion of the supplied fuel;
- as a result of flashing the electronic control unit, you can get rid of initially uncorrected bugs;
- all changes made to the electronic module are completely reversible;
- idle speed becomes more stable and less dependent on ambient temperature.
Typically, injector tuning is accompanied by an increase in engine power of up to 20 horsepower. If the main goal of tuning is to increase the efficiency of the car, then such a significant increase in horses is not observed. The recommended golden mean for the changes made is the maximum improvement in dynamic characteristics, accompanied by an acceptable increase in fuel consumption.
The beginning of chip tuning
The result of injector chip tuning is not only a change in the dynamic characteristics of the car, but also an extension of the service life of the power system and cylinder-piston group. All changes must be carried out on a fully functional car, since in the presence of technical faults it becomes difficult to obtain the desired result from tuning.
Electronic control unit VAZ 2107
Chip tuning must begin with the selection of software. Sources of the necessary software can be:
- Developments of tuning service centers. The average car owner often does not have access to these programs, so to flash the module you will need to contact a specialized studio;
- Openly available software created by other car owners. This method of chip tuning should be treated with caution, since most software is not tested for its effect on the engine, which can quickly damage it or worsen its dynamic characteristics;
- Write the execution code yourself. This option is suitable only for car enthusiasts who understand programming and have the ability to control engine parameters upon completion of tuning.
If there is insufficient knowledge and lack of software, the quality of which the car owner is confident, it is better to trust the modernization to specialized workshops. Although chip tuning is a reversible operation, operating a car with incorrect software can significantly reduce the life of the power plant and fuel system.
