Tuning of the VAZ "classic" engine: how to increase power
VAZ models are well known in the CIS 2101, 2103-06 or Niva is called a "classic". Power units on these cars are carburetor and are very old today, however, given their prevalence, there are many willing to refine these internal combustion engines.
With that in mind, that the engines themselves are fairly simple, do not have electronic control, such tuning of the VAZ classic engine can be made even in the conditions of garage. The main thing, to have at hand all the necessary tools for disassembly of the internal combustion engine, spare parts are required, as well as the availability of knowledge and skills.
The result can be boosting the motor to 110-120 horsepower. There are even specimens with a capacity of about 150 c.. (Depending on the quality and depth of works). In this article we will consider, how to raise the power of the VAZ classic engine.
Increasing the working volume of the VAZ engine
As you know, one of the most important parameters for the internal combustion engine is the working volume. From that, what is the volume of the motor, depends on its power, reception of the unit, etc..
It is more comfortable to operate a more powerful machine, as the stock of a torque and power allows not to "twist" the engine strongly, as acceptable traction appears at lower speeds.
As for increasing the workload, there are two main ways:
- change the diameter of the cylinders;
- increase the stroke of the piston by replacing the crankshaft;
These methods are actively practiced for tuning serial engines AvtoVAZ, which are found under the hoods of various models. To be precise, we are talking about the very first engine on the "penny" 2101 with power 60 c.. or "eleventh" engine 21011, and about the VAZ power unit 2103-06 with power 71-75 c.. Also do not forget about the carburetor 80-horsepower 1.7 liter engine on the Niva model and other modifications of the above internal combustion engines.
Let's go back to tuning. To perform refinement, can be used as serial parts, and special elements for tuning. In the first case, the total cost of modifications will be significantly cheaper, as serial parts are easier to find and cheaper to buy.
so, consider a specific example. If there is a VAZ engine 2101, you can grind the cylinders to 79 mm, then put the pistons from the motor 21011. The working volume will be one thousand two hundred and ninety-four cm3. To increase the stroke of the piston you need to have a crankshaft from 2103, to make a move 80 mm. Then you need to buy shortened connecting rods (on 7 mm.) As a result, the volume will be one thousand four hundred and fifty-two cm3.
Quite obviously, that if you grind the cylinders and at the same time increase the stroke of the piston, the end result will be the amount of engine "penny", which will be 1569 sm3. Note, that similar operations are performed with other motors on "classic" models.
pay attention, regardless of the block, drill more 3 mm cylinders are not recommended, as the risks of severe wall thinning and resource reduction increase significantly, as well as damage to the cooling system ducts.
It is still important to consider, that after installing another cloned and increasing the stroke of the piston there is an increase in the degree of compression, requiring the use of gasoline with a higher octane number. Additional compression ratio adjustments may also be required. The main thing, correctly choose shortened piston rods, etc..
We will also add, that the simplest and cheapest method can be considered boring under repair pistons. However, even if you grind the unit to the last repair size, the volume increases no more, than on 30 "Cubes". In other words, a significant increase in power in this case should not be expected.
Other engine modifications: intake and output
If you take into account the recommendations of experts, to make the engine agile, you should not try to increase its volume more than the mark 1.6 l. An increase above this figure will mean, that the engine is "heavier" and spins less intensely.
As for the works, special attention should be paid not only to the block, but also the cylinder head. The refinement involves grinding the cylinder head channels, by which the fuel comes from the intake manifold. It is important not only to achieve greater cross-section of the channel, but also a smooth transition, and that all channels ended up the same.
The next step will be the modernization of exhaust ducts and valves. Channels are polished, and the valve can even be replaced. Example, the appropriate option is selected (it is possible and from a foreign car), then the valve rods are processed to the dimensions for the VAZ motor.
We also recommend reading the article about it, whether it is possible to put the turbine on the carburetor engine. In this article you will learn about the features and nuances of installing a turbocharger on a carburetor engine.
Valve plates should be treated in parallel. It is important to adjust all the valves by weight. It is necessary to approach separately a question of installation of a cam-shaft. That the engine pulled well from "bottoms" and at high turns, optimally select the camshaft, which provides a high lift of the valve. At the same time, a split gear is necessary for precise adjustment of the gas distribution phases.
As a result
As you can see, engine tuning, including classics, by the amount of work to a greater extent affects the BC and cylinder head. However, we should not forget, which will also require a carburetor in the tuning. So no wonder, that the forced engine requires more gasoline and air, that is, the carburetor also needs to be upgraded and adjusted.
As for the parts for the internal combustion engine, everything will depend on the specific tasks. If the budget allows, it is best to put special rods, replace cast pistons with forged ones, it is also recommended to replace the bearings, etc..
You still have to take care of that, that the engine received enough air in different modes, for which it will be necessary to replace the standard air filter with a zero resistance filter (zero). The ignition advance angle will require separate settings (УОЗ). In most cases, the release also changes to Spider by default 4-2-1, at the output is "direct current".We also recommend reading the article about it, how to perform tuning and carburetor adjustment. In this article you will learn about carburetor injection settings, and what you need to consider to obtain certain results in the carburetor tuning.
Finally, I would like to add, that if all the work is done correctly, then even a significant increase in engine capacity does not greatly affect fuel consumption. Moreover, the cost may fall. The point is, what the best thrust, elasticity and pick-up of the engine after improvements allow to untwist the power unit less on the lowered transfers for accelerations and maintenance of usual pace of driving.
The main thing, correctly adjust the carburetor and ignition system to take into account the changed engine capacity. As a result, the boosted engine increases the comfort of the vehicle, and the procedure itself is often cheaper, than engine swap or, Moreover, installation of turbocharging on the carburetor with the minimum modifications of already available power unit.
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