low resistance filter - Toyota Corolla, 1.8 L, 2003

In fact, the filter is a mesh with an extremely fine cross-section of holes. However, the air filter has considerable resistance to air flow, which increases as the filter becomes clogged. This reduces the filling of the cylinders and, as a result, leads to a drop in engine power, which is most noticeable at high engine speeds. Naturally, engineers are fighting this phenomenon by increasing the area of ​​the filter element. But there are already problems with the placement of a larger filter in the engine compartment. As a solution to these problems, a low resistance filter made of non-woven fiber (so called “cotton”) or foam material (foam rubber) has been proposed. Basically, they differ in the material from which the filter element is made. And those and others are imperatively saturated with mineral oil and require regular flushing. The service life of such an air filter, as a rule, reaches 100,000 km. Oil impregnation makes it possible to increase the size of the filter mesh openings, since in this case the role of the dust trap is taken over by oil, to which the dust simply sticks. Therefore, make sure that the filter is slightly damp. Each manufacturer has several models of universal cone filters. Basically, their difference lies in the power indicators of the engine for the operation of which they are designed. This is an important factor, because if you install a filter designed for power up to 100 hp. on a 150 hp engine, there will be no positive effect from such an installation. Several different models of low resistance air filters, which differ in efficiency, can be offered for the same engine, and so-called "KIT" sets of cone filters are produced, which have everything you need for correct filter installation on a certain car model. Such "KIT" kits are the most effective, as they are developed taking into account the characteristics of each engine and, accordingly, provide a greater increase in power. The easiest to install are filters of low resistance, which are designed to replace the standard air filter and are placed in its standard housing. The most advanced air filtration system among the offered range of low resistance filters are cold air intake systems. They are the most efficient and provide the greatest power gain. Now about the power increase itself. Where does it come from. This is a consequence of the reduction in air flow resistance at the intake. Correspondingly better cylinder filling. The effect begins to manifest itself in the zone of medium revs and above, up to maximum, where the engine especially requires as much air as possible for efficient operation. As a result, if with a standard filter after 5800 rpm. If you felt a drop in power (at a maximum of 6500), then with a low resistance filter, the increase in power continues up to 6500 rpm. min. The maximum power developed by the engine increases from 128.9 hp. up to 138.2 hp These figures were achieved with the AlfaRomeo 156 2.0 LTwinSpark engine, which has been fitted with a Performance-Kits low-resistance air filter with a Raid foam filter element. Raid is the official technology partner of AMG Mercedes racing teams (DTM Circuit Racing Championship), Opel (V8 Star Championship), AMG Formula 3 Team, Subaru Team (WorldRallyChampion ship–
WRC). Since 2001, all AMG Mercedes cars have been fitted with Raidhp handlebars and air filters. Raid's latest and most significant development is MAXFLOWKits, a cold air intake system. As noted above, such a system is the most progressive and effective, it completes the top line of low resistance filters. MaxFlowKits is an aluminum or carbon fiber (depending on the manufacturer) cone, tightly fitted on the filter element and serving as a screen from the warm air coming from the engine. A corrugation is attached to the inlet, taking cleaner and colder air "overboard". The special shape of the housing and the filter element itself create additional turbulences that contribute to the complete filling of the engine cylinders.