Very heavy muffler. Why is a homemade element better than a factory one? Installing an additional resonator

Only a small part of car enthusiasts would like to have a loud sports exhaust on their car. The vast majority of drivers, on the contrary, are puzzled by the question of how to do quiet muffler. The ride can only be comfortable if as little air as possible enters the cabin. extraneous sounds. The muffler creates its own background noise, which can be significantly reduced. The effect of this cannot be ignored.

Basic ways to make a muffler quieter

Before you start upgrading exhaust system, you should understand the nature of the increased exhaust sound. With each working stroke of the piston, a micro-explosion occurs in the combustion chamber of the engine cylinder, which is accompanied by a significant sharp expansion of gases. Naturally peculiar blast wave, after it has done its job and moved the piston down, with the opening of the exhaust valve it rushes through the exhaust system.

Thus, the nature of exhaust system noise is twofold:

sound from expansion of gases;
noise from vibration of exhaust system elements.

As you know, the main way to combat noise is to increase the weight of the elements. The thicker the metal, the less vibration and, accordingly, noise. That's why an exhaust manifold, which is the first to take on the hot gases from the cylinder head, is made so massive. Many car enthusiasts who had the opportunity to compare the weight of the exhaust pipe domestic car and foreign, noted that the parts of the exhaust system of foreign cars are much heavier. This is why “our” cars are less comfortable in sound and noise comparisons.

Reduce gas speed in exhaust pipe called upon special elements: resonators and mufflers. First in line is the resonator. As soon as gases under pressure enter a part of the pipe with an increased volume, they immediately lose some of their energy and move further with less momentum. In the muffler labyrinth system traffic fumes They finally lose their energy and dissipate. A real quiet muffler on a foreign car is quite heavy and has several separate housings.

Do-it-yourself quiet muffler, video:

Making a quiet muffler with your own hands

When starting to modernize the exhaust system in order to reduce exhaust sound, you should be prepared technically and financially. For work you will need full set car mechanic tools. In addition, you will definitely need:

welding machine (preferably semi-automatic or inverter);
angle grinder with a set of discs;
a workbench equipped with a vice.

One of the most available ways getting a quiet muffler in the average garage is to include it in the existing exhaust system additional resonator.

There are also two options for upgrading the exhaust system: installing an additional factory-made resonator in the area between the main resonator and the muffler, or making the device yourself.

When considering how to make a muffler quieter, you should keep in mind that either option may entail different costs. If the car enthusiast is not limited by budget, then you can safely buy a new resonator, cut out part of the pipe and weld it into the free space. The second method turns out to be more exciting and should be described in more detail.

The technology for manufacturing an additional resonator consists of next stages:

manufacturing a body (barrel) from a piece of thin-walled steel pipe or sheet steel in the form of two halves;
making holes in a section of the exhaust system pipe corresponding to the length of the body behind the main resonator;
connecting the body halves on a pipe with holes and scalding;
laying basalt mineral wool into the cavity of the new body;
welding of the end parts of the resonator.

Finally, the welds should be processed, the new resonator should be cleaned and degreased, and if possible, painted with heat-resistant paint.

Video, what is an exhaust manifold and resonator?

Additional problems of a quiet car

Once the question of how to make a quiet muffler has been resolved, some problem areas. First of all, it should be remembered that any of the methods for producing a “quiet” exhaust system will certainly lead to an increase in the weight of the structure.

This, in turn, obliges the motorist to accept additional measures to strengthen brackets and rubber shock absorbers. Another point to consider is changing the balance of air entering the motor and exhaust gases. After upgrading the exhaust system, it is imperative to test the operation of the engine in different modes and make additional adjustments to the fuel supply and air filtration system.

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How to make mufflers quieter? | Articles, reviews - all about exhaust systems

If you want your car to run quieter, then in this situation you should make some changes to the exhaust system. It is she who is responsible for damping the sound wave generated during engine operation. It should be noted that we are talking about a standard exhaust system and muffler, and not a direct-flow one, since these two systems are quite different. And yet, we will not consider options when the internal structure of the muffler is completely changed and redesigned, a lot of welding work is carried out, etc., here we will talk about in the usual ways.

How to change the sound from the muffler to quiet?

There are a few simple ways how to make a muffler quieter.

To do this, you will need to do one of the following actions, namely:

install an additional resonator;
replace the resonator with a new one that has a sound-absorbing filler;
replace the muffler with a new and high-quality one.

Any of the above options can make the sound of the muffler quieter. It remains to comment on the points, and let's start with the last one.

Muffler replacement

If you have not changed the standard muffler in your car for a long time, then it itself can operate in increased noise. Why is this happening? From corrosion processes, from elevated temperature Over time, perforated sections of pipes and parts of partitions inside the muffler can begin to burn out, and sound reflectors become unusable. All this changes the picture of sound absorption not in better side. And often problems with excessive noise from car operation lie in the loss of its properties by the muffler.

If you are changing a muffler, then buy a product from trusted brands, with the proper thickness of steel on the can. The muffler must exactly match your make and model of car, taking into account technical parameters engine and overall dimensions.

Installing an additional resonator

To reduce noise from a car, they sometimes resort to a strategy such as installing an additional resonator. As you know, the resonator in the exhaust system is responsible for damping (dispersing) low-frequency sounds, especially peak ones, in the sound wave, and the muffler does the rest of the work. If the noise from the car that you would like to eliminate has low (bass) notes, then installing an additional resonator will allow you to suppress low sounds again, which will have a positive effect on the overall picture.

An additional resonator is installed between the main resonator and the muffler. For this:

cut out a part of the pipe between the main resonator and the muffler;
weld (mount) an additional resonator in this place;
adjust the ignition system and fuel supply due to changes in the exhaust system.

The latter is worth checking, as any modifications to the exhaust system will affect the engine. It is unpleasant to receive a decrease in power or an increase in fuel consumption as a result of the pursuit of silence.

Installation of a resonator with an absorbing filler

IN in this case, instead of the main resonator, a new resonator is installed, having sound-absorbing material as its filler internal space. With this design, in addition to low frequencies, any other noise will be compensated and muffled, which will have a great effect on the overall sound picture of the car. This resonator design is similar in structure to a direct-flow muffler, and it does not create unnecessary resistance to the movement of exhaust gases. The filler material most often used by manufacturers is basalt fiber. He holds up great high temperatures, And long time does not lose its properties.

The only drawback such a resonator is its price in comparison with the standard model, however, it copes with its task perfectly.

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Do-it-yourself quiet direct flow using a flute or damper

It is difficult to imagine a sports or tuning city car without a direct-flow muffler. The noble roar of the engine pleases the sensitive ears of the owner, thrills girls, and arouses the envy and admiration of friends. However, neighbors don’t always like this, and the traffic police prefers quiet forward flow. This is where the driver faces the question: what to do to muffle it, what methods are used to make the exhaust quieter.

Why is forward flow needed and why sometimes it needs to be muffled

A car with an exhaust louder than 96 dB will not be able to pass technical inspection and will not cross the border - in Europe the rules traffic tough, and the police are incorruptible. Even in motorsports, sound is limited. Only Formula 1 promoters don't like the attempt to drown out the noise from cars. They even opposed the new regulations for the transition from eight-cylinder engines to V6, fearing for the prestige of racing.

Having decided to muffle the forward flow with your own hands, you need to clearly understand the principles of operation of the agreed release, and determine the purpose of the car tuning performed. Improvement in dynamic characteristics occurs only through the installation of a new “spider” - the exhaust manifold. The remaining components of the exhaust system simply should not create resistance to gases and adversely affect the result.

At correct setting, resonant exhaust gives an increase in torque by 3–9% for naturally aspirated engines, and more than 10% for turbocharged engines. But in production cars increase in cylinder filling rate working mixture with modernization less than 2–3%.

Installing a direct-flow muffler on regular stock cars is only needed as a decorative option for a pleasant exhaust timbre. Main criterion quality of direct flow operation production car– euphony and velvety noise of the engine, and not an increase in power. The car will scream louder or quieter - at high speeds and dynamic characteristics it will not be reflected. In this case, when there is an urgent need to stop the forward flow, you can do this without thinking about the consequences.

What is a flute in a direct-flow muffler, and what is its effect?

To make the forward flow quieter and get “passing” decibels at the output, a simple design is used, which motorists call a flute. This is a piece of perforated tube with a length of 180–250 mm and a diameter of slightly more than 1/3 of the exhaust, with a welded plug washer in the form of a disk, cylinder or cone, which is bolted inside the forward flow, at the air cut, thereby allowing it to be muffled.

The principle of operation of the flute for direct flow is that when the cross-section of the exhaust channel changes and exhaust gases exit through the perforations, the following occurs:

change in speed and pressure;
the sound wave breaks;
the volume decreases by 3-4 dB, the exhaust becomes quieter.

The correct name of this flute is silencer (from the English silencer - muffler), and it is included in the kit expensive systems exhausts that are sold on the Internet. Can also be purchased separately average price good European models cost 70–150 dollars, and mass-produced ones from the Middle Kingdom cost from 450 rubles.

DIY flute for direct flow

If you have the desire and skill, then making a flute with your own hands in order to muffle the forward flow is not at all difficult. It will turn out cheaper than the branded one, but not always better than the Chinese one.

To work, you will need a 20 mm steel (preferably stainless) pipe and a piece of sheet metal 0.8–1.2 mm thick. It is advisable to cook using arc welding, following the rules for working with stainless steel. A pre-bent steel sheet plug with holes for fastening is welded to the pipe. You can screw it with three M8 bolts, but for installation in a few minutes, one is enough threaded connection.

During manufacturing, you should try to carefully measure the internal diameter of the muffler at the air end so that the plug fits in loosely, but without a gap. Then, when leaving the track, you can quickly remove the flute from the hot pipe with a pair of wrenches or pliers.

It is important to remember that any obstacle in the exhaust pipe, including a silencer, will inevitably reduce engine power. It’s definitely not possible to make it quieter and muffle it without loss.

Direct flow with damper

To make a quiet direct-flow muffler, but not lose the additional power that modernization of the exhaust tract gives, use a direct-flow muffler with a damper. This exhaust design has been known for a long time and is found on many BMW models (usually with manual transmission).

When the engine is running at low settings, when the advantage of the coordinated exhaust is not taken advantage of, the exhaust gases exit through a conventional muffler, and the direct-flow muffler is closed with a damper. On optimal speed the damper opens the outlet into the forward flow, and the motor produces maximum torque due to enhanced ventilation of the cylinders.

The damper control is automatic, but there are also manual models. In the city, such a car sounds almost no different from a stock one, and on the highway it not only sounds like a tuner, but has a real increase in power. It's not cheap - for full automatic, complete with a titanium “spider”, the price often exceeds a couple of thousand dollars.

Similar in capabilities, but not very famous analogues cost moderately, but choose suitable option It’s better to work with a specialist - the success of such an upgrade may require the knowledge of a motor engineer.

A budget option A direct flow with a damper can also be welded independently from scrap materials. The top part from an old carburetor is suitable for the damper, if you remove the cable idle move to the salon. Making such a design with your own hands will take much more effort and time than for a homemade flute, and the result of the installation cannot be predicted in advance. It's not difficult to mute the sound, but to maintain power, even if you're lucky, you'll have to tinker with the settings.

Conclusion

Whatever exhaust muffling option you choose, you should understand that you can simply buy ready-made solution, if finances allow, or you can drown it out with your own hands by making a device from improvised means.

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Direct-flow muffler, do-it-yourself muffler tuning. How to tune a muffler. We make a direct-flow muffler with our own hands.

Installing a direct-flow muffler is one of the easiest ways to attract the attention of others to your car. The loud “growling” sound that comes from the bosom of the exhaust system has always been common, both among owners of tuned vehicles and among owners simple cars. More on this later in the article.

Quiet straight-through muffler
Pro tips on how to achieve the desired muffler sound

Muffler tuning, what you can do from the technical part of the car with your own hands

Thanks to the installation of a direct-flow muffler, a loud, bass sound is created that attracts the attention of others and makes your car stand out from the stream of other cars. In fact, installing a direct-flow muffler is done just for this purpose.

However, not every car owner has the necessary amount of money to install a professionally made direct-flow muffler, which is why many drivers create a direct-flow muffler on their own, which is actually quite simple.

Direct-flow muffler, differences between a direct-flow muffler and a stock muffler

If we consider the main purpose of direct flow, then it is worth noting that it removes exhaust gases from the engine much faster, which, by the way, is also subject to tuning. A conventional exhaust system significantly limits the tuned engine, and a direct-flow muffler makes it possible to increase power. However, in our case we should only count on the appearance of a loud “sports” sound. Even if an increase in power occurs, it will be insignificant and you will hardly be able to feel it while driving.

Direct-flow muffler, advantages

The advantages of a direct-flow muffler include:

Powerful "growling" sound.
Fast removal of exhaust gases from the internal combustion engine.
Slight increase in power.

Direct-flow muffler, disadvantages

Firstly, you will not be able to pass the inspection honestly. However, this has not been a problem for a long time, especially after the abolition of the traffic police compulsory passage THAT. Insurance companies sell MOT even despite the car.

Secondly, it is likely that a strong sound will irritate the people around you, especially in your yard, if mothers with children are walking there, and so on.

The third important disadvantage is that after making similar changes into the design of the exhaust system, there will be an increase in fuel consumption. And although it will be insignificant, for some car owners it may still be an unpleasant surprise, especially given today's fuel prices.

There is another factor, much more significant. After installing a direct-flow muffler, it is quite possible that you will be disappointed due to inconsistency final result with the expected.

Surely, many have heard the sound of cheap direct flows mounted on domestic cars. If after a grueling and long work you will get the same thing, it will be quite unpleasant for you. And that's putting it mildly. Therefore, if you take on this work, it is likely that you will have to redo everything several times.

Tools, devices, consumables for work

We make a direct-flow muffler from a standard muffler with our own hands, step by step

The whole process consists of three stages:

We will not focus on the first stage, since everything here is more or less clear. You just need to remove the old muffler from the car. Next, we study the design of the standard muffler, after which, making some changes, we calculate the design of the forward flow.

How to fill a direct-flow muffler

First, we cut out the housing from the old muffler and open it. Then we remove everything internal components, with the help of which the sound is muffled. After this, you need to weld your old pipe and a previously purchased new one, which must have a large diameter. Next, we weld it all into the housing that remains from the old muffler.

Quiet straight-through muffler

Externally, virtually nothing needs to be changed, otherwise it will be difficult to attach the muffler to the bottom, although sometimes more serious changes are made, but for the first time it is advisable not to complicate the task for yourself.

If you don't like the way the part of the pipe that comes out from under the bottom looks like, change it using special attachments. They are sold at any auto store.

Do-it-yourself direct-flow muffler from a perforated pipe, step by step

It is necessary to take into account that the temperature in the exhaust system is quite high, as a result of which a pipe made of heat-resistant steel should be used for direct flow. Otherwise it will burn out very quickly.

Soundproofing a muffler, or how to make a direct-flow muffler quiet

To create a powerful sound and isolate the elements of the machine from heating by the muffler, you need to wrap the welded structure with heat-resistant sound insulation. The denser the shell, the stronger the sound will become. The top of the insulation must be covered with a stainless steel sheet, which is tightened with steel clamps.

After this, we attach the entire structure to regular place. However, as a result of the slightly thicker body, the muffler holders may need to be modified. They may need to be re-cooked.

Naturally, you should not expect that you will get the same sound as professional direct-flow mufflers, since they use completely different technologies and materials. However, the sound of your car will be noticeably improved.

The main thing in this matter is to be able to cook well. If you don’t get the desired sound the first time, don’t be discouraged, it’s not that difficult to redo everything. You can find out more information from next video.

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It seemed like not much time had passed since car muffler used exclusively to remove exhaust gases from the system. His second task was to reduce noise levels.

This is not surprising. When cars first appeared, there were only special valves, which opened at the driver’s command. At the same time, such a loud whistle was heard that the administrations of all large cities in the world were prohibited from performing this action within city limits.

Years passed, and a full-fledged car muffler appeared. Moreover, since then it has undergone many modifications. One of the latter made it possible to significantly increase the efficiency of the engine.

Muffler device

General Scheme

Every car manufacturer is trying to create the most productive system that will meet all international standards. It is not surprising that they make changes to certain details. But if we take exclusively the exhaust system, then there is a canonical design that rarely changes. It can be divided into four parts:

catalyst,
back or car muffler,
resonator,
receiving pipe.

Working together, all these parts ensure the removal of exhaust gases. The downpipe transports gases to the catalyst. Some automobile manufacturers an additional vibration compensator is installed. This device takes on some of the vibrations. This allows you to significantly extend the life of the exhaust system.

The catalyst burns the remaining gasoline that was not ignited in the cylinders. However, the main role of the catalyst lies elsewhere. The device allows you to convert carbon into a less harmful state.

By appearance the catalyst resembles a tank. Moreover, inside there is a whole network of elements that in appearance resemble a honeycomb. When gases pass through them, a chemical reaction begins.

A resonator is installed behind the catalyst. A little further you can see the same car muffler. The designs of these two parts largely depend on the vehicle and its purpose. For example, on sports car you will see one device, and on family hatchback other.

The internal design of these two parts does not simply dampen noise, but also smoothes out the engine strokes. If we talk about certain design features, then the resonator does not differ in any special features. In fact, it's just a tank with a pipe.

Another thing is the car muffler. In some cases, it is a real work of art, which not only has a positive effect on the performance of the engine, but also represents a striking touch in the design of the car.

Design

There are many variations in muffler design for cars. The following factors are important:

car make,
engine capacity,
manufacturer,
model.

Fortunately, despite many variations internal organization All mufflers for cars are almost identical. It consists of partitions, perforated pipes and heat-resistant wool.

The main task of a car muffler is to slow down the speed of exhaust gases. This allows you to smooth out the strokes while the motor is running. Precise standards for internal structure no, so each manufacturer tries to find its own unique moves that will give it an advantage over its competitors.

Attention! The cut of one car muffler can be extremely different from the cut of a similar part from another company.

The determining factor is general scheme exhaust system. As an example, let's take a design that has a small resonator. Such a design decision will lead to the fact that the system will not be able to properly smooth the flow. This, in turn, will increase the load on the muffler.

An increase in load forces designers to increase the size of the car muffler. Also subject to change internal structure. However, you can see this from the pictures above. Each structure is a collection of tubes and partitions. Its main task is to maximize efficient use volume.

Thanks to the many holes in the tubes, exhaust gases can quickly disperse throughout the volume of the car muffler structure. In turn, the role of the partitions is to direct them back. This smoothes out uneven flow.

Attention! The role of the restraining force is performed by mineral heat-resistant wool. This preserves the walls of the tank and significantly reduces noise levels.

Making a muffler with your own hands

As you can see, a car muffler is not particularly complicated. It is not surprising that many motorists decide to do it themselves. But not everything is as simple as it might seem. For example, there are many modifications of car mufflers, each of which has its own advantages and disadvantages.

Attention! Before you make a car muffler yourself, you must decide for what purpose you need it. Only after this you will be able to choose best option.

A proven method for making a muffler yourself

One of the most simple methods manufacturing of this device is the way which is based on a conventional fire extinguisher. It will serve as a template for the future product. In this case you will need:

pipe with internal diameters two inches;
parts of the old muffler;
welding electrodes;
welding machine;
Bulgarian,
cutting wheels for metal.

An old car car is ideal as a base. powder fire extinguisher. The result of the manipulations will be a device that will allow you to use all the capabilities of the engine with sufficient efficiency. The creation algorithm consists of the following stages:

Unscrew the head of the fire extinguisher and pour out the powder.
Enlarge the existing hole for the pipe. Do the same on the opposite side. In this case, it should move closer to the wall.
On the sections of pipes that will be inside, it is necessary to make cuts with a grinder. They must be end-to-end.
Install the sections into the cylinder. The perforated sections should be placed at the center or as close to it as possible.
The connections must be thoroughly boiled. When doing this, be very careful not to burn through the metal.
Cut off the fasteners from the fire extinguisher. Weld them to the car muffler.

After the car muffler is made, you will need to check its reliability. To do this, plug the pipe with a plug and fill the device with water. There should be no leaks.

Attention! After draining the water, you need to blow out the car muffler before installation.

Results

Due to constant development automotive industry A new generation of mufflers has appeared that can significantly increase engine efficiency. Every motorist can create such a device; just follow the instructions.

There are lovers straight-through exhaust when a loud roar of the engine is heard. But there are also those who think about how to reduce the sound of the muffler. If you make a quiet muffler with your own hands, then the ride will be more comfortable, because the cabin will be quieter. Especially on domestic cars like the VAZ 2109, the question of how to make silent muffler. If you can make a quiet muffler on the nine, then the car will bring more joy to its owner.

Before tuning the exhaust system, you need to understand the reasons why the sound of the engine becomes louder over time. The operation of the engine itself is a fairly loud process, but the muffler and other components of the exhaust system perfectly suppress this loud noise. Without a muffler, the engine noise is very loud.

The noise occurs due to an explosion occurring in the combustion chamber. fuel mixture, this releases gases, which then exit into the exhaust pipe. We will not talk in detail about the operation of the engine, you can read about this in another article, but here we will talk specifically about how to muffle the exhaust sound.

The explosion releases energy that pushes the piston, and when the piston has gone the required distance, it opens Exhaust valve, through which exhaust gases exit and go further through the exhaust system. To effectively absorb noise, thick metal parts are used. So, the thicker the metal used in the exhaust system, the quieter the car will drive due to the fact that there will be less vibration.

The exhaust manifold is the first one to absorb the noise, which is why it is made so large and thick, so it best dampens the noise that comes from the cylinder block. Even if you compare the exhaust pipe of any more or less normal foreign car with the exhaust pipe of a domestic car, you can see that in foreign cars the pipe is heavier and thicker, which is why such a car runs quieter.

That is why when you drive an old VAZ 2114, the noise is so loud that you can’t hear what the passengers are saying rear seats, which is why thoughts arise on how to muffle the exhaust sound.

The exhaust system also has a resonator, which is needed to reduce the speed of gases through the exhaust pipe. And after the resonator muffler coming. When exhaust gases pass through the resonator, they lose some energy and continue to flow more slowly.

Gases lose the largest share of their energy in the muffler. If we consider a good muffler, then it contains several separate housings, after passing through which little remains of the noise.

How to make the quietest muffler for a car yourself?

When the issue with noise during car operation has gone too far, and you have decided to make the quietest muffler for the car, then you need to start by preparing the tool. We will need:

welding machine, an inverter or semi-automatic will do;
angle grinder and discs for it;
workbench with a vice.

The most faithful and inexpensive way To make the muffler quieter, weld in an additional resonator. This can also be done in garage conditions on one's own.

An additional resonator can be placed between the standard resonator and the muffler. You can install a ready-made resonator; you just need to weld it into the desired place in the pipe. Or you can assemble the resonator yourself. For those who doubt whether the exhaust will become quieter if an additional resonator is welded in, the answer is clear - the exhaust will become quieter. If everything is done correctly.

How to make an additional muffler resonator with your own hands

Making a muffler resonator with your own hands is quite simple; now we will discuss each step in detail. First you need to make the outer casing, it can be made from any steel pipe with thin walls: which looks like this:

Then you need to take perforated iron with a thickness of 4.5 mm. This is enough to insert it into the end part, as in the photo below:

Then you need to pull the resonator body onto these washcloths, as in the photo:

When everything is ready, you need to process the seams and you can paint heat-resistant paint and after that the quietest muffler on the car is ready.

Possible inconveniences associated with a quiet muffler

The car will now be quieter, which is what we wanted to achieve, but there may be some disadvantages - an increase in the overall weight of the exhaust system. Therefore, it is necessary to hang stronger brackets so that rough road the exhaust pipe did not come off. There are also cases when rubber shock absorbers are hung. But in fact, a homemade resonator will weigh about 2-3 kg.

It is also necessary to test in action how the exhaust system works so that gases exit normally through the exhaust pipe. Therefore, you need to check at higher speeds, then you can do correct conclusions. But as a rule, gases will escape through such a resonator without difficulty.

How to change the sound from the muffler to quiet?

There are several simple ways to make your muffler quieter.

To do this, you will need to do one of the following actions, namely:

install an additional resonator;
replace the resonator with a new one that has a sound-absorbing filler;
replace the muffler with a new and high-quality one.

Any of the above options can make the sound of the muffler quieter. It remains to comment on the points, and let's start with the last one.

Muffler replacement

If you haven’t changed your car for a long time, then it itself may operate in high noise mode. Why is this happening? Due to corrosion processes and elevated temperatures, over time, perforated sections of pipes and parts of partitions inside the muffler can begin to burn out, and sound reflectors become unusable. All this changes the picture of sound absorption not for the better. And often problems with excessive noise from car operation lie in the loss of its properties by the muffler.

Installing an additional resonator

An additional resonator is installed between the main resonator and the muffler. For this:

cut out a part of the pipe between the main resonator and the muffler;
weld (mount) an additional resonator in this place;
adjust the ignition system and fuel supply due to changes in the exhaust system.

Installation of a resonator with an absorbing filler

In this case, instead of the main resonator, a new resonator is installed, which has sound-absorbing material as a filler in its internal space. With this design, in addition to low frequencies, any other noise will be compensated and muffled, which will have a great effect on the overall sound picture of the car. This resonator design is similar in structure to a direct-flow muffler, and it does not create unnecessary resistance to the movement of exhaust gases. The filler material most often used by manufacturers is basalt fiber. It holds high temperatures well and does not lose its properties for a long time.

The only drawback of such a resonator is its price in comparison with the standard model, however, it copes with its task perfectly.

Only a small part of car enthusiasts would like to have a loud one in their car. The vast majority of drivers, on the contrary, are puzzled by the question of how to make a quiet muffler. Driving can be comfortable only if as little extraneous sounds as possible enter the cabin. The muffler creates its own background noise, which can be significantly reduced. The effect of this cannot be ignored.

Basic ways to make a muffler quieter

Before you start upgrading your exhaust system, you should understand the nature. With each working stroke of the piston, a micro-explosion occurs in the combustion chamber of the engine cylinder, which is accompanied by a significant sharp expansion of gases. Naturally, a kind of blast wave, after it has done its job and moved the piston down, rushes through the exhaust system with the opening of the exhaust.

Thus, the nature of exhaust system noise is twofold:

sound from expansion of gases;
noise from vibration of exhaust system elements.

As you know, the main way to combat noise is to increase the weight of the elements. The thicker the metal, the less vibration and, accordingly, noise. That’s why the exhaust manifold, which is the first to absorb hot gases from, is made so massive. Many car enthusiasts who had the opportunity to compare the weight of the exhaust pipe of a domestic car and a foreign one noted that the exhaust system parts of foreign cars are much heavier. This is why “our” cars are less comfortable in sound and noise comparisons.

Special elements are designed to reduce the speed of gas movement in the exhaust pipe: resonators and mufflers. First in line is the resonator. As soon as gases under pressure enter a part of the pipe with an increased volume, they immediately lose some of their energy and move further with less momentum. In the muffler labyrinth system, the exhaust gases finally lose their energy and are dissipated. A real quiet muffler on a foreign car is quite heavy and has several separate housings.

Do-it-yourself quiet muffler, video:

Making a quiet muffler with your own hands

When starting to modernize the exhaust system in order to reduce exhaust sound, you should be prepared technically and financially. For work you will need a full set of car mechanic tools. In addition, you will definitely need:

welding machine (preferably semi-automatic or inverter);
angle grinder with a set of discs;
a workbench equipped with a vice.

One of the most affordable ways to get a quiet muffler in the average garage is to include an additional resonator in the existing exhaust system.

There are also two options for upgrading the exhaust system: installing an additional factory-made resonator in the area between the main resonator and the muffler, or making the device yourself.

Considering the question of , As quieter as possible, keep in mind that either option may incur different costs. If the car enthusiast is not limited by budget, then you can safely buy a new resonator, cut out part of the pipe and weld it into the free space. The second method turns out to be more exciting and should be described in more detail.

The manufacturing technology of an additional resonator consists of the following stages:

manufacturing a body (barrel) from a piece of thin-walled steel pipe or sheet steel in the form of two halves;
making holes in a section of the exhaust system pipe corresponding to the length of the body behind the main resonator;
connecting the body halves on a pipe with holes and scalding;
laying basalt mineral wool into the cavity of the new body;
welding of the end parts of the resonator.

Finally, the welds should be processed, the new resonator should be cleaned and degreased, and if possible, painted with heat-resistant paint.

Video, what is an exhaust manifold and resonator?

Additional problems of a quiet car

Once the question of how to make a quiet muffler has been resolved, some problem areas become apparent. First of all, it should be remembered that any of the methods for producing a “quiet” exhaust system will certainly lead to an increase in the weight of the structure.

This, in turn, obliges the car owner to take additional measures to strengthen the brackets and rubber shock absorbers. Another point to consider is the change in the balance of air entering the engine and exhaust gases. After upgrading the exhaust system, it is imperative to test the operation of the engine in different modes and make additional adjustments to the fuel supply and air filtration system.

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