Every car owner wants to modify his car to be perfect in everything. But perfect car should be not only externally, but also internally. The engine also requires improvements. If you tune the motor, then you can't go without a filter. zero resistance.

You cannot do without installing such a device, since the new injection, the reworked intake and exhaust system significantly raise the power indicators of the power plant, which requires the most smooth operation. more air.

If in such a situation a zero resistance filter is not installed, then the motor will simply "choke". He will waste and twitch, since the mixture will not be enriched at all. You can also buy these filters at any auto parts store. The so-called "zero", very easily replaces the regular one. The mounts are interchangeable. The aesthetic side of the new filter should also be noted. It will give the engine a sporty look.

Why install a zero resistance filter?

It is important to understand the essence of the question: is it possible to use a zero-wheel on an ordinary car, and, if possible, then which one to choose? In order to fully and with understanding deal with this issue, you need to understand how the zero resistance filter works.

As everyone knows, any air filter must filter the incoming air from unwanted environmental influences, as this air mixes with the fuel to achieve a rich mixture. It was not in vain that the designers came up with the idea of \u200b\u200binstalling air purification agents on motors, since they reduce the wear rate of parts and assemblies of the power plant. In particular, they protect piston group... If you remove the filter, then the microparticles, which have abrasive properties, coming with air, will wear out the motor parts in a very short period of time.

But the other side of air filters must also be considered: they are very dense, so not only particles, but also air is difficult to pass through such material. This causes the motor to lose its power. It cannot produce full horsepower, as it simply "suffocates". And, in addition, the more resistance the air receives, the less power will be output. Very often, this phenomenon can be observed in the summer, when the air filter is clogged with all sorts of dirt and dust, interfering with the passage of air. But, after dismantling the old one and installing a new filter, something seems to move into the engine. The power increases, the dips disappear.

In order to minimize the resistance to the incoming air, and allow the motor to work at all horsepower, they came up with such special means for cleaning the air.

"Nulevik" is specially designed so that the motor can consume as much air as possible. Air filters installed on racing cars, increase the motor power by several horse power.

The main advantages that tuning lovers highlight

Many are wondering, but not everyone knows what a zero-wheel will do with a conventional motor.

• The power of the power plant increases up to 10%. This is despite the fact that the filter is still there, and particles will not enter the cylinders along with the combustible mixture.
• The zero point does not require frequent replacement, unlike a conventional filter.

Such an air purifier, as it gets dirty, is simply washed with a special aerosol. After processing, the unit can be reused. You can install a modern filter in a regular place, depending on the shape, but you can simply put it on and clamp it with a clamp on the air supply line.

How to properly care for the filter?

In order to service the zero, it must be removed from the car. Then it is cleaned with a special brush. Cleaning has passed, now the entire filter is applied special tool for cleaning filters. Now you should wait 10 minutes for the product to saturate the filter. Further, after this time, the filter is washed in some container with water. And after that you need to rinse the element under running water.

After the filter has been cleaned, you do not need to dry it at all. The best thing to do is to simply remove the remaining water with the usual shaking. There are cases when the product has poorly impregnated the filter, and light spots have appeared on it. In this case, the tool will have to be used again. After completing the entire procedure for cleaning the zero resistance filter, it can be mounted back. According to the factory data, zeroes are designed for 20 washes. Further flushing is useless, and you cannot do without replacement.

It should be noted important information: Zero resistance filters perform well on power plants with large volumes. Weak and small engines will not notice the increase in horsepower from such a device.

People's opinions that if the air filter is completely dismantled, then the engine will become much more powerful, are completely mythical. Nothing really happens. When the designers invented the engine, they calculated all valve timing, taking into account the resistance of the air filter. So, in addition to the fact that the motor will become unusable very quickly, due to the ingress of a large number of "extra" particles into it, removing the filter will not add power.

It is up to the owner to decide whether to use a standard accessory, or try to tune your car.

Video

It's no secret that the air filter has some effect on power. power unit car and its efficiency indicator. The more effective its filtering properties, the more it suppresses the engine. In this case, a compromise is needed: the installation of an effective filter element with less resistance. Does such a filter exist?

What is a zero resistance filter for?

It is believed that such a filter is a zero resistance filter. Even in spite of the good performance of the filter elements of this design, the attitude towards their installation cannot be called unambiguous. Many motorists note the fact that after changing the usual element to a filter with zero resistance, no changes were noticed.

Figure 1. Zero Resistance Cone Air Filter

On one of the sites, I came across an article, it is given below, which talks about all the advantages of such filters and states about their usefulness.

What does the use of a zero resistance filter give?

The purpose of air filters is to prevent the ingress of various particles into the area of \u200b\u200boperation of the cylinder-piston group of the engine.

Greater airflow filtration efficiency inevitably leads to a loss in engine power. Standard filter papers from Bosch, Mann, Champion, Fram, SCT or Hengst are characterized by significant resistance to air flow due to the high density of the filter media. The stronger the resistance, the more significant and tangible the loss of power. This is especially evident before the date of filter replacement, when it is already sufficiently dirty.

The zero resistance filter design provides the ability to reduce the inlet flow resistance without compromising filtering properties and loss of motor power. Zero resistance filters are widely used in sports cars when it is important to add a few horsepower to the engine.

At the heart of the “zero” filter element is the use of a multi-layer cotton gauze impregnated with a special oil composition, which is located between the pressed aluminum screens.

The standard air filter has the ability to clean the air flow with only one plane. The design of the nulls allows the entire surface of the incoming air to be filtered, which helps to retain more dust. The impregnation for the zero resistance filter causes dust particles to settle sequentially on each cotton fiber layer.

The service life of standard air filters is very limited and averages about 15 thousand kilometers, after which they must be replaced. Cleaning this filter does not bring the desired effect. But filters with zero resistance have a resource exceeding 100 thousand kilometers.

The economic effect observed after installing a filter with zero resistance:

• the plus, first of all, is that its installation allows you to save fuel up to 4%, due to the powerful air flow and increased filtration effect;
• there is also an increase in power up to 5%, while maintaining the filtering ability in comparison with the standard element; a more complex design of the element provides low resistance to air flow and has significant filtering properties, which protects fuel system from contamination, and the piston group from premature wear.

Many people like the appearance of a unique in nature induction noise emitted from the filter when the engine is running.

The owners of some off-road vehicles quite positively characterize the installation of "zero" on the car. And if we take into account the frequent off-road movements of such vehicles, then the use of this filter is accompanied by a quick payback.

If you own a sufficiently new car, chip tuning and refinement of the exhaust system, then installing a filter with zero resistance will be quite effective.

As for old cars or low-power ones, for example, the classic VAZ model line, the purchase and installation of a filter with zero resistance will not in any way affect the increase in power or improvement in efficiency. Such a replacement is not justified and looks like nothing more than a farce of the owner.

It should be noted that the purchase and installation of a low-quality filter will not only not improve the performance of the motor, but can also greatly harm it, since such elements filter even worse than standard filters.

It should be noted that a filter with a conical design is able to add a little more performance to the motor than a filter installed in a regular place.

Figure 2. Air filter of zero resistance in a regular place

Opinion about the inefficiency of nulls

In order not to tire you with reading, I will not describe the disadvantages of the zero resistance filter. I think it will be much more interesting to watch the video test, the conclusion in which is based not on speculation and subjective opinions, but on real measurements carried out special device... So, let's see.

Whether or not the filters we are discussing are useless is up to you to decide. However, my opinion is that if such filters were more effective than paper or fluff filters, then car manufacturers would install them routinely, off the assembly line. In general, I am against installing filters with zero resistance.

Installing a zero resistance filter on a car

If, after watching the video, you still want to check the effectiveness of filters with zero resistance from your own experience, then proceed as follows. First dismantle the filter housing itself. Then remove the section with the MAF sensor. After that, the zero resistance filter is attached with clamps to the section with the mass air flow sensor, and the entire structure is attached to the air intake pipe.

The filter must be securely fastened to prevent it from loosening.

There are special kits on sale, both for mounting the filter on any car, and for installation on a specific model.

How to maintain a zero resistance filter

The filter can also be cleaned like the installation with my own hands... The filter is dismantled and, using a brush with a soft fluffy coating, gently clean the outer surface of dirt.

Then apply the special Universal Cleaner to all sides of the filter. After 10 minutes after the complete impregnation of the filter element with the composition, the filter should be washed with water in a container, and then washed again under running water.

Figure 3. Zero Resistance Filter Cleaner

It is not necessary to dry such a filter; it is enough to shake it vigorously a few times to remove the remaining water. Drying with heating devices is not recommended, so as not to damage the filter element. If white spots appear on the outside or inside of the filter, it can be re-soaked. After that, the filter is installed in its place.

If you drive a car frequently in dusty conditions, the zero resistance filter oil is reapplied every 5,000 km. Under normal operating conditions, impregnation is carried out after 10 thousand kilometers. The filter resource is capable of withstanding at least 20 washings.

I'm talking about filters of zero resistance. To be honest, I myself thought to install one on my car, but despite all the simplicity, it turns out that there are a lot of pitfalls here. Therefore, you need to weigh all the pros and cons, which we will do in this article. In general, really true information from the person who almost bought it (but stopped in time). Looking ahead, this is not at all the "zero" that you thought about ...

To be honest, this is a very controversial tuning of your engine, why you will understand at the very bottom, if you are impatient, immediately scroll down, watch the video, but if you want to get information about what they say “on the shelves”, start from the very beginning.

To begin with, I will repeat a little (there is information in the previous article) and remind you - why do you need a filter element at all?

Why do you need a filter in the engine

It's very easy to catch all the filth that flies in the air - fluff, leaves, midges, but especially dust. The whole thing adversely affects the engine inside, since dust is the smallest particles of sand that will simply melt at high temperatures. And they will settle inside on everything and everyone, some clever person figured that without an air filter, the engine's service life drops 10 times! So it is needed in any case - that is, it is not discussed, if you want an axiom.

Why is the staff so bad?

Again, everything is simple - as we know at the unit internal combustion only 4 strokes, this is intake, compression, ignition, and exhaust gases. The engine, on the intake stroke, sucks the air-fuel mixture into the engine cylinders, if gasoline goes along its own line, then air is sucked in from the environment. If the filter was not there, it would be sucked in with everything that came across (midges, dust, etc.), but the filter protects from this - however, it is a kind of plug that prevents the air from passing normally, that is, resistance is encountered.

The standard filter element has a significant coefficient of resistance, often taking 5 - 7% of the motor power. This is understandable, it practically does not let dust particles through, it is made of special paper.

This element is far from ideal, it seems - everything is simple, but damn there is no solution and that's it! Or is there?

Zero resistance

Of course, there are - filters of zero resistance have long been created, which practically do not delay the air supply, that is, they give the motor "breathe deeply", they simply give 5-7% of the power concealed by standard elements, and this indirectly affects both consumption and dynamics acceleration and maximum speed - such a budget tuning.

The principle of such a filter element is a specially selected material from which it is made. As it is assured that these are large pores and a minimum of paper in the structure. Usually cotton fabric is used, several layers, which is located on a special aluminum screen.

However, "zeroes" are not the same, they can be of two types.

Varieties of filters of zero resistance

At the moment, two structures are distinguished:

• No impregnation or dry - as it is assured, not as effective. It looks like a regular regular filter element, but the materials used are completely different. Gives a power increase of up to 5%.
• Impregnated. The most effective one is made of fabrics (several layers), impregnated with a special oily composition. Dust enters it and settles on the "oil" (grease) and remains there. Power increase up to 7%.

It is the second type that has become widespread, which is "soaked", because we are fighting for power, and 2% (of the first type) is essential. However, it has much more disadvantages, for example, every three thousand kilometers it needs to be washed, dried, then soaked again - otherwise, the dust and other deposits that it retains will clog it tightly, the performance and air flow will drop many times, that is, it will become even worse. than a regular filter. In this regard, the first option is much more effective - it needs to be changed every 10 - 15,000 kilometers, in principle, like a regular filter element.

To a regular place or not?

Often, anyone who thinks about installing such "zeroes" has a choice - to put the air filter in the regular place or put a separate one, that is, bypassing the standard box. Often, many firms make a separate one, it certainly looks impressive, but is its installation justified? Let's take a look at each of the situations:

• ... That is, without regular placement. According to the manufacturer, these options are the most productive, that is, they are capable of delivering just up to 7% of the power. YES and look impressive under the hood. However, there are many controversial points, the whole point is that - a heated engine has a high temperature, and this element sucks air, so to speak, just on top of the engine, where it is about 50 (and in summer all 60) degrees Celsius. The point here is this - the density of hot air is much lower than that of cold air, so such a filter turns out, even loses in power, because it supplied hot air - its density at 50 degrees Celsius - 1.109 kg / cm3 ... Whereas air at 20 degrees has a density of 1.204 kg / cm3 ... The difference is almost 10%, here is your increase in power, you will lose even more and the effect of such an element will be negative than positive.

• To a regular place ... Now they are sold for almost every car, that is, you can throw out the standard one and put a "zero" in your car - square, in general, as we are used to. However, as the manufacturers assure, its performance is lower, that is, it can give up to 5% to power. But such a zero resistance filter has its advantages, namely, the standard air intake system, as a rule, is located either next to the wing or under the engine, where the air is much cooler. Thus, we increase its density (that is, suck from the bottom), and not from the top hot. It turns out that this is exactly the effect of 5% power increase.

That is, the second type, in a regular place, wins in almost all respects.

Pros and cons

Needless to say, it seems like some pluses:

• Increases power.
• Due to the pass a large number air consumption decreases, because as the engine is not overstrained.
• It can be installed in a regular place, that is, for almost any car, nothing needs to be redone.
• It can also be changed after 10-15000 kilometers, as standard options.

However, there are also disadvantages:

• It is expensive, if you take branded ones, the price can go up to $ 150 (about 10,000 rubles), when a regular even branded one costs only about 1,500 rubles (maximum), and analogues can be bought for 200 - 300 rubles. In fairness, there are filters of zero resistance, which are cheaper - about 1,500 - 2,000 rubles, but compared to analogs, this is ten times more.

• If you install a separate one, then you not only may not feel the increase in power, but also lose it, due to the suction of hot air from the top of the engine.
• If you take the option with impregnation, you need constant care for it, every 2000 - 3000 kilometers you must wash it, clean it and lubricate it again, otherwise you will not only get power, but vice versa - it will fall. Very uncomfortable.
• There are still debates about the effect of these filters, some say that they give absolutely nothing, others, on the contrary, but where is the truth? I don’t really want to pay 2,000 rubles (and even more so $ 150) for what.

The truth about the "zeroes"

Well, here we come to the most interesting, namely, if there is any sense from them at all. After all, you can talk for hours how wonderful they are, but if the effect is zero, then everything is in vain.

One of the most honest tests is a dynamo test, when they drive the car to measure its power before installation, with a conventional element or "stock", as they say now. Then they install a filter of zero resistance and run it again - according to theory, the power should increase by 5 - 7% from the stock one! BUT tests have shown that this is not at all the case, that is, there is either no effect at all, or there is, but insignificant, at the level of 1 - 2% that you will not notice at all.

I will say this - I also thought to put myself such a filter in order to raise the power, but it turned out to be all bullshit, just a marketing ploy or "show off" like tuners. But to overpay for do not understand something - as it does not really want to.

Since the beginning of the era of internal combustion engines, engineers have been preoccupied with the invention of a device that would purify the air entering the engine.

Over the years, filters have become simpler, more compact and more efficient, and not so long ago the modern zero resistance filter, which can be found in most sports and racing cars today, has appeared on the market.

According to the principle of air filtration, it is closer not to simple paper ones, but to oil-based devices that are already outdated today, which were operated in difficult conditions... In them, air passes through a conventional "curtain" that constantly rotates and is dipped in oil.

Oil retains coarse dirt, and the fabric mesh is lighter. Modern zeroes, of course, are not much like oil filters, but the principle of retaining contamination due to the oil base has been preserved.

It should be understood that if you decide to install zero filter, you need to take care of upgrades and other devices in the iron horse.

When tuning the engine, motorists neglect to change the intake system. And this is necessary, since with an increase in power, more air is required, and, therefore, you cannot do without a zero resistance filter. It is also recommended to install an increased throttle, sport camshafts, and cylinder bores.

Let's consider in more detail the device of nulls, their features, service rules.

What is a zero resistance filter - design

The zero-valve has a more complex design compared to a simple air filter, which gives it a number of advantages. One of the most important elements construction is a multi-layer cotton fabric for filtration, we will describe what it is for and how it is installed.

1. Cotton paper with tightly compressed fibers is used as a filter material. Dirt gets into the structure, clings to the fibers and turns into part of the filter element. Due to this, the zero resistance filter filters out much more dust per square inch than paper counterparts. In some models, you can find foam rubber. In this case, the fewer pores in the filter material, the more efficient the operation of the device.
2. The filtration cloth is enclosed in an aluminum screen. Such zero resistance filter housing increases the surface usable area by five times and makes it possible to pass more air, while dirt practically does not interfere with the passage of the air flow.
3. And of course, the correct impregnation of the element is not unimportant. special composition oils.

VIDEO REVIEW

What does a zero resistance filter give - is it worth installing

A conventional air filter is designed to clean the air by preventing dust and other contaminants from entering the engine. But a side effect of air purification is a decrease in engine power, since the paper material has a high resistance to air flow. The thicker the paper, the higher the resistance, and hence the higher the motor power loss.

The zero resistance filter makes it possible to solve this problem by using a slightly different device. It is used instead of conventional air filters to reduce engine power losses while maintaining high air quality.

Of course, it is more effective in specially trained and racing cars, since in a car with a conventional engine, installing a filter gives only an increase of 3-5% of power, and the driver simply may not feel any difference in the acceleration of the car, and the cost of installing expensive equipment will be useless.

So to summarize the pros and cons:

Pros:

• effective air purification while maintaining engine power due to a complex filter configuration,
• reusable use - every 15 thousand kilometers it is recommended to clean it from dirt, rinse it with water and treat it with a special agent,
• increase in engine power - after installation, the engine power increases by five percent, plus a unique noise characteristic of sports cars appears,
• ease of installation (installation is possible without involving a car technician),
• a large selection of models from different manufacturers.

Minuses:

• the need for regular maintenance, purchase of a special solution for treatment,
• rather high price for quality products.

Thus, the use of zero is really necessary and justified if the car is equipped with a forced engine, or you are planning to tune your car.

Maintenance of zero resistance filters

After the purchase, you should immediately take care of purchasing a special impregnation solution. The use of this tool is mandatory, otherwise the filter will quickly clog and stop performing its functions.

VIDEO REVIEW

The device is taken care of according to the following algorithm:

1. remove the device,
2. remove dirt with a soft bristle brush,
3. apply solution to both sides cleaningfilter zero resistance and leave it for a few minutes,
4. rinse in a container with water, and then rinse under running water and shake well,
5. put back in the car.

It is recommended to repeat the washing and treatment procedure every 8-10 thousand kilometers, with intensive use - every 6-8 thousand kilometers. One filter can be processed in this way on average up to 20 times, after which it must be replaced with a new one.

What not to do!

The moisture does not need to be completely dried, and even more so, heating elements such as a heater or hair dryer cannot be used.

Should you install a zero filter on a motorcycle or scooter

Zero filters are often installed by owners of two-wheeled vehicles - mopeds, scooters, motorcycles. In particular, this applies to sports vehicles with a powerful engine.

The selection of a zero plate for a scooter or motorcycle is performed taking into account the diameter of the inlet pipes. For scooters with a volume of 125-150 cc and a G6 engine, this figure is 42 mm, with a volume of 50-100 cc - 38 mm. The selection of a device for a moped is performed in a similar way.

Purchase sports filter zero resistance for motorcycles and scooters is justified if complex tuning is planned. The factory intake and exhaust systems are designed for a specific air flow, so when replacing the filter, you will need to additional settings exhaust system and carburetor. If you do not carry out these works, then most likely you will face premature wear of all system parts and early engine wear.

1. Blox,
2. Jacky,
3. Pro-sport,
4. Mannol.

The average cost of one device fluctuates around 600-3000 rubles. At the same time, you need to understand that the cheapest options are unlikely to be able to cope with their task at the proper level, and there may be more harm than good from them. If you decide to install this device, do not spare the money to purchase a really high-quality and reliable product from a trusted manufacturer.

The “filter of zero resistance” (although it is correct to speak of “reduced” resistance, it cannot be zero) is one of those internal combustion engines that have become firmly established in the mass consciousness as a must have item. You can see the zero filter both on a serious tuning project and on a Chinese scooter. Moreover, the owners of such filters do not at all represent either their principle of operation, or the rules for caring for low-resistance filters.

What does the zero resistance filter give?

In an internal combustion engine, the working medium is atmospheric air. The more it enters the cylinder, the more fuel burns in it, the higher the temperature and pressure during the working stroke of the piston. Hence the increase in torque and power.

But, the higher the engine speed, the stronger the influence of the resistance of the intake tract on the filling of the cylinders. If on low revs for gasoline engine filling is still cut by the throttle, then in the "slipper to the floor" mode, the power already depends on the configuration of the intake, the settings of the receiver and the resistance of the air filter.

What is a "zero" resistance filter for? by definition resists air flow. Even if you remove the filter, turbulence at the cut of the air intake pipe will create some loss in filling - it is not for nothing that bell-shaped forms are used in sports receivers.

Moreover, a high-quality filter with high degree cleaning, with an equal surface area "strangles" the motor more than passing all the dust into the cylinders. Therefore, previously, air filters were not installed on sports engines at all - at most, nets were attached to the air intakes to protect against accidental stones. The resource of the motors was still calculated for several races, and the increased abrasive wear of the cylinder-piston group was not critical.

But the technology, which was used not in such extreme modes, and simply without rich sponsors, the problem of reducing the resource due to the lack of air filtration was acute. Therefore, the "zero filter" has become a kind of compromise between the throughput and the degree of air purification.

Structurally, "zeroes" are made of two types of materials: cotton or large-porous foam rubber, but the essence of the work remains the same. The filter curtain itself does not filter sufficiently, its pore size is effective only against relatively large particles. This ensures low resistance to air flow.

The impregnation for the zero resistance filter - a special sticky oil that envelops the microcells in the filter curtain - fights against fine dust. While the air flow passes through the "labyrinth" of the curtain, microparticles adhere to the oil film.

For this reason, filters of this type require regular flushing to remove contaminants and old oil and new impregnation.

Foam filters are the most effective in terms of air purification: it is not for nothing that they are already used from the factory on many motorcycles, the operating speed of which can exceed the five-digit mark. Foam rubber is easy to clean, has sufficient thickness so that dust has time to adhere to the walls of the cells. Cotton "cones" and curtains are much less convenient to clean because of the rigid reinforcing mesh inside, and their effectiveness (especially in cheap models) is less.

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Pros and cons: is there a sense of "zero"?

In reality, the difference with and without a filter is noticed only on a dyno. The benefit from reducing the resistance of only one element of the intake system appears exclusively in the "full throttle" mode at high revs, in the standard urban driving cycle the effect of the "zero filter" is exactly zero.

Even for uprated engines, the reduction in inlet resistance gives a penny benefit. Take, for example, a graph taken at the stand with a Nissan Skyline ECR33, whose RB25DET engine has already deviated from the standard configuration:

The result is not bad - 250 horsepower on wheels. But, if you remove the air filter altogether - to ensure that the intake resistance is reduced even more than that of a high-quality "zero" - we will get the second graph:

The drop in power after a peak of 5000 rpm has become smoother, but the difference in numbers is negligible: its increase without a filter is only 8 horsepower. With the 250 hp we already have, it is impossible to notice anywhere other than the track, when the count goes to hundredths of a second.

And for these pennies you have to pay with the complication of maintenance and the deterioration of air purification.

Filters of "zero" resistance have the "right to life" only on (and first of all, on forced ones, not supercharged ones). But even there the installation of a "zero" is one of the many stages of fine-tuning: installing wide-phase camshafts, adjusting and grinding the intake channels, adjusting the receiver. Otherwise, the zero air filter is nothing more than a harmful, albeit beautiful, accessory.

In addition, the oil impregnation of "zeroes" is itself capable of causing problems on engines equipped with fuel mass flow sensors. The air flow, passing through the filter, carries away oil microparticles, which then settle on the walls of the inlet pipes and directly on the surface of the sensitive element. Because of this layer, which works as a heat insulator, the mass air flow sensor begins to "lie", giving an incorrect injection signal. And here, with the "gone" composition of the fuel-air mixture, the conversation will not be about a microscopic increase in peak power, but about a tangible drop.

In some cases, the FTS installation itself is even capable of reducing the maximum engine power. When installing a fashionable cotton "cone" or foam rubber "mushroom", you have to dismantle the standard air filter box and air intake. On unsuccessful layout engine compartment after this "anti-tuning" the engine receives not air, which is close in temperature to atmospheric, but already heated, passing through the radiator. An increase in air temperature for every 10 degrees Celsius gives a loss in density of 0.04 kg / m3 - and an average atmospheric two-liter engine, spinning up to 5000 rpm, drives 35-40 cubic meters through itself per minute! As a result, the engine with an air filter of zero resistance receives less air mass than with a standard, supposedly "strangled" intake.

The inevitable harm from the use of zero air filters is the accelerated wear of the cylinder-piston group. Even the air purification results of these filters, declared by the world's leading manufacturers (for example, K&N), do not exceed 99% under ideal conditions and using an expensive branded oil for impregnation. A paper curtain air filter is capable of filtering 99.5 to 99.9 percent of dust. It would seem that the difference is not great - but after several tens of thousands of kilometers, we will already talk about the difference in whole grams of dust that got into the engine cylinders. Moreover, as it gets dirty, the paper filter only increases the degree of filtration: dust, clogging the pores, reduces the flow area, and they become able to retain smaller particles, albeit at the cost of increasing resistance.

In the case of “zero” particles, the contamination on the pore surface reduces the probability of adhesion of new particles, and the pore cross-section is still larger than the size of the filtered particles, as the degree of contamination decreases, the degree of purification decreases with little changing resistance. Previously used contact-oil air filters suffered the same, where oil soaked the fishing line stuffed inside (structures familiar, for example, from trucks and motorcycles). "Nulls" have become a more compact and lighter version of these filters, long supplanted by paper filters.

And mistakes when servicing the filter make the rate of wear only higher. Someone manages not to impregnate filters, someone uses cheap aerosols or oils that are completely unsuitable for impregnation. Try rubbing a drop of the branded oil between your fingers: it is so sticky that even wiping it off is difficult. Other oils will not give any noticeable improvement in cleaning compared to a filter that is not soaked at all.

The only plus for engines that have not undergone serious tuning, from the installation of "zeroes" can be considered the absence of the need for regular replacement: it is necessary to wash and re-soak the same filter in time.

Video: Air filters "zero" - evil or tuning?