The first step in the functional tuning of domestic cars is to increase the power of the power unit. There are several ways to increase engine capacity, although in most cases they are combined.
Forcing the engine is not such a painless procedure as it might seem at first glance. First of all, you need to consider the economic feasibility of this operation. Experts, based on practical experience, consider it reasonable to increase the engine capacity by no more than 25% from the original. If you need a more tangible increase in power, you should think about installing a new power unit. The main factors preventing the unlimited expansion of the working area are:
- the requirement for a sufficient thickness of the walls of the cylinder block, preventing the destruction of the metal during detonation;
- the mass of the cylinder block is sufficient to effectively remove heat from the working area;
- close proximity to the working area of the channels of the cooling system;
- the inability of the engine lubrication system to increased loads.
These nuances should be taken into account when increasing the volume of an engine in a VAZ. In this regard, several methods are proposed to achieve the goal.
Bore cylinders to the required diameter
Boring the engine cylinders is a completely standard procedure that is used during the overhaul of the power unit, which is performed to eliminate the gap between the elements of the piston system, which increased due to wear during long-term operation. Naturally, the degree of boring is greatly limited by certain conditions that cannot be neglected. To increase the resistance of metal walls to deformation, a special treatment of the inner surface is used or liner liners made of durable and refractory materials with high thermal conductivity are pressed into cylinders. It is important to note that such operations are very expensive. In any case, the boring of the cylinders is always associated with the refinement of the engine cooling system.
Shortening rods
By shortening the connecting rod strut, it is possible to increase the height of the working area when the piston is at bottom dead center. Naturally, this leads to insufficiently high pressure of the air-fuel mixture during the compression stroke, which can be compensated by the installation of turbocompression fuel injection systems. It is quite realistic to combine a slight reduction in the length of the connecting rod with a flashing of the electronics of the control unit of the fuel supply system on engines with injection injection.
