How easy is it to make a straight-through muffler yourself?
A direct-flow muffler is a mandatory element of all sports cars, but tuning enthusiasts often install a direct-flow muffler on their cars.
At the same time, not everyone knows that a direct-flow muffler acts not only as a decorative element, but also significantly affects the technical parameters of the car.
And as a decoration, direct flow is not suitable for every car - definitely, an old Zhigul with a wide pipe instead of a regular muffler looks, at least, ridiculous.
Anyone wishing to install forward flow on their car should take into account that this is a rather complex and responsible procedure that requires certain experience and skills.
What is forward flow
Let's try to figure out what a direct-flow muffler is in technical terms and how its design differs from the design of a conventional exhaust system.
A direct-flow muffler is one of the elements of the gas removal system, in which coolants and exhaust gases move in a closed loop in a parallel direction.
Unlike a conventional muffler, a direct-flow system does not have a sound absorber. The design features of direct flow contribute to the accelerated removal of exhaust gases from the engine, which in turn ensures an increase in power and efficiency of the power unit by an average of 15%.
You should also know that the modernization will affect not only the exhaust pipe - the changes will affect almost all elements of the gas exhaust system. In addition, after installing forward flow, it is necessary to adjust the vehicle’s power system on a special stand.
Advantages and disadvantages of a direct-flow muffler
Anyone wishing to replace the standard muffler on their car with a forward flow one should take into account both the advantages and disadvantages of such an upgrade. Below we present the pros and cons of this design.
Advantages
- Increased engine power due to a larger exhaust pipe diameter and reduced joints and bends.
- Gives a conventional engine the sound characteristic of powerful power units installed in sports cars.
- The durability of the exhaust system is achieved through its manufacture from high-quality materials.
Flaws
- Significant increase in engine noise level.
- Problems arise with the traffic police when passing the next technical control.
- An increase in harmful emissions into the atmosphere due to the lack of a direct-flow catalyst muffler in the design, which can become an obstacle when passing technical inspection.
- Reduced ground clearance due to increased exhaust system dimensions.
- Increased likelihood of engine freezing at subzero temperatures.
- Lack of universal designs of direct-flow mufflers. If forward flow is not initially included in the design of the car, it must be adjusted to a specific model, which creates significant problems when it is necessary to repair or replace the system.
Let's add to the disadvantages of forward flow that tuning enthusiasts will have to pay at least $2,500 for the bassy timbre of their “iron horse.”
As follows from the above, direct-flow mufflers have more disadvantages than advantages, however, fans of direct-flow mufflers are not deterred by this fact, and some of them, who have certain design skills, make the system themselves.
How to make a direct-flow muffler with your own hands
Let's look at how to make a forward flow with your own hands. A straight-through muffler can be obtained by converting the conventional exhaust system of a car. To do this you will need the following materials and tools:
- angle grinder (grinder);
- welding machine;
- pipes of the appropriate diameter;
- glass wool or ordinary wool;
- heat-resistant insulator;
- stainless steel sheet.
To make a direct flow, the standard muffler must be dismantled. In this case, it is necessary to cut off its walls and remove all parts of the old structure. Next, you need to drill a hole in the new pipe, the diameter of which should correspond to the diameter of the standard muffler pipe.
A hole is drilled at the junction of the two elements. Using a welding machine, a pipe with a diameter of 20 cm and a length of 1 meter is welded onto this pipe. The resulting structure is placed in a disassembled housing and sealed with heat-resistant material.
The body should be carefully welded on both sides.
The next step should be soundproofing the resulting structure. Heat-resistant materials must be used as soundproofing materials. To ensure the proper timbre of the engine sound, the upper part of the muffler must be wrapped in glass wool and covered with a stainless steel sheet. In this case, it is necessary to provide a 5-centimeter overlap on each side.
Finally, the holder ears should be welded and a direct-flow muffler should be installed on the car.
The design of a direct-flow muffler can be assembled in another way. A piece of the housing is cut through a standard muffler and the elements present in it are completely dismantled. Many holes are drilled across the entire surface of the pipe.
The old pipe is sawed off, and a new one is inserted in its place, having a similar diameter and the required length. After fixing the connection points and welding, all empty space of the body is sealed with heat-resistant material, for which it is recommended to use metal sponges for washing dishes.
After careful compaction, the body is welded and painted with heat-resistant paint.
How to install a direct-flow muffler (video)
Bottom line
As you can see, there is nothing particularly complicated in the manufacture of a direct-flow muffler, but if we abstract from the desire to stand out in a stream of cars with a bassy rumbling engine, a completely reasonable question arises - will the car owner really benefit from a direct-flow muffler?
Judging by the practice of foreign auto tuning specialists, professional modernization of the exhaust system can add about 12 horsepower to the engine, and sports car models can be boosted by as much as 30 horses by installing forward flow!
However, all this in reality may only be needed for cars participating in various races and competitions, and forward flow in ordinary city driving conditions is a very controversial and ambiguous phenomenon.
Naturally, a bass engine in conditions where the noise level on city streets already exceeds all conceivable limits will only cause irritation to others, but if the car owner is used to it and wants to constantly be in the spotlight, a direct-flow muffler will certainly help him achieve this desires.
Source: http://ProCrossover.ru/avtolyubitelyu/tyuning/pryamotochnui-glushitel.html
Do-it-yourself direct-flow muffler for a car: how to make it, what it is, how it works and how it differs from a regular one + drawings
Car tuning is a way to personalize a standard iron horse to your own taste.
There are so many options to turn your car into a unique means of transportation! At the same time, amateurs pay attention not only to the external design, but also to the sound effect.
To increase the sound of the engine roar, sports direct-flow mufflers are used, which create an entire acoustic performance around the car. The main advantage of such products is that they can be bought at any auto store or made independently.
To understand what a direct-flow muffler is, you need to have a good understanding of the exhaust systems of modern cars. So, any standard muffler is designed to perform a number of tasks:
- remove exhaust gases from under the car body;
- reduce engine noise;
- protect people in the cabin from the penetration of toxic waste.
A conventional muffler has several chambers that are separated by partitions. These obstacles are needed to ensure that the noise of gases invariably decreases from chamber to chamber.
But a direct-flow muffler does not have such partitions. It serves only one purpose - it removes exhaust from the engine. Moreover, if there is no resistance in the form of partitions, then the engine power invariably increases.
Design differences
If we talk about the design of direct flows, then in general it is similar to the structure of conventional resonator mufflers. Of course, there are no partitions or cameras. Basalt wool or a similar sound absorber is usually used between the housing and the perforated pipe. The sound of the muffler's roar depends on the thickness of the packing and the material used.
The use of basalt wool allows you to increase the level of the muffler roar
In addition, characteristic sounds are produced by the exhaust, which passes through the holes in the pipe. The number and diameter of holes also affect the intensity of the roar.
Perforated forward flow pipe allows sounds to be amplified
Today on the Russian car market you can find several types of direct-flow mufflers. At the same time, the price range for these products varies from the most budget to luxury, so any car owner will be able to afford the purchase of direct flow:
- The cheapest in the segment are Powerful direct flow units. The diameter of the inlet tube is 48 mm, while the outlet nozzle is quite powerful - 102 mm in diameter. The affordable price is explained by the simplicity of the design and low roar. The sounds produced by Powerful will not be much different from the noises produced by conventional mufflers. However, such forward flow adds a little power to the engine, so it can be considered an effective element of the exhaust system for any car. Powerful forward flow is the most purchased model in the budget segment of mufflers
- Remus is one of the most popular direct flow models in Russia. The inlet pipe diameter is 45mm and the exhaust tip is 89mm. Such a muffler costs a little more than the Powerful due to thicker pipe walls and a decrease in the resistance force when the engine is running. The direct exhaust Remus, originally from Austria, is popular among Russian car enthusiasts due to the optimal combination of affordable price and good quality
- The SVR straight-through muffler differs from the designs of budget mufflers. The intake pipe has a diameter of 52 mm, and the exhaust pipe has a diameter of 54 mm. That is, the diameter of the entire pipe is approximately the same, so the SVR can produce a unique loud roar. In addition, such a muffler adds up to 10% of engine power.
- Supersprint belongs to the class of elite direct flows. It is made entirely of stainless steel and produces the loudest roar. The inlet pipe has a diameter of 60 mm, and the exhaust is all 95 mm. This model also has excellent quality - Supersprint will serve for many years.
A muffler with two exhaust pipes installed on the car increases the roar of the car and at the same time ensures silence in the cabin.
How to make a direct-flow muffler with your own hands
To save money on purchasing a factory direct flow, you can make a “glushak” yourself. Moreover, constructively, this procedure is quite simple, but several nuances should be kept in mind: the muffler must be completely sealed and quickly remove the entire volume of exhaust gases from the system.
The simplest direct-flow manufacturing technology is to remake a conventional muffler. You can use the muffler that is already on your car or buy a new one. The main thing is that the workpiece is intact and has no soot, deformations or cracks.
Video: making forward flow from a conventional muffler
Preparing tools
In this case you will need:
- angle grinder (grinder);
- drill;
- welding machine;
- electrodes;
- metal brushes for washing dishes.
Preparation of materials
Of course, if you are going to remake an old muffler, then first of all you need to remove it from the car and inspect it. If the pipes are not damaged, then they can be considered a necessary material for the manufacture of direct flow.
Based on a standard muffler, a direct-flow muffler can be made without cost or time loss
Job
After preparing all the necessary tools and materials, you can start working:
- Use a grinder to cut out the upper part of the main muffler (that is, you will need to remove a piece of the casing to gain access to the insides).
- Next, all partitions and small tubes need to be removed from the body - cut out with a grinder.
- After which only one tube should remain inside the housing.
- Using a drill, you need to drill many small holes in the pipe along its entire length.
- The space inside the main muffler should be lined with metal scouring pads.
- After carrying out all these procedures, the cut piece of the body must be carefully welded back.
The straight-through muffler is ready for installation. It should be noted that this manufacturing method allows the car owner to minimize expenses, and at the same time, the “glushak” creates a really juicy and loud roar.
The main thing is to drill the maximum number of holes in the pipe
Second way
You can go another way - for example, make a direct flow from improvised elements, without using a conventional muffler. This is a more complicated method, since you will have to carefully select each element of the new muffler. However, if it is possible to get all the pipes and sheets of metal at an affordable price, then the method will fully justify itself.
Video: how to make a direct flow from scrap materials
Preparing the tools
Just as in the first case, you will need a grinder and a welding machine.
Necessary materials
Stainless steel sheets with a wall thickness of 1.5–2.0 mm are best suited. You can also use a cheaper analogue - for example, aluminum.
Job
Depending on the availability of materials, you can immediately find or make a pipe with holes. The length of the pipe should not exceed 130 mm, and the diameter of the holes should not be more than 2.5 mm. You will need to find a craftsman who will make two 42 mm flanges for attaching the pipe. After this you need:
- Cover the pipe with holes with fireproof material - for example, basalt wool or asbestos.
- Make a muffler body from two pieces of metal.
- Place the perforated pipe inside the muffler body and fill the existing gaps with glass wool.
After which the direct-flow muffler can be considered ready for use. The method allows you to create a “glushak” of any size, but the manufacturer must be able to work with electrical equipment.
A tube with holes is the main element of the forward flow
How to make forward flow quieter
This is one of the many questions that plague owners of cars with direct flow. It would seem that a straight-through muffler is installed on a car to roar and make powerful and rich sounds.
But the car owner is not always ready to endlessly listen to lectures from neighbors and law enforcement agencies.
After all, excessive noise is prohibited in residential areas, and therefore your gas supply at night may be a reason to call the police.
Table: maximum noise level of direct-flow mufflers
To make forward flow quieter, there is a special plug for the exhaust pipe. It's called a silencer. Using a silencer is very convenient: you just need to insert a plug into the exhaust, and the sound will practically disappear, while the operation of the exhaust system will not be affected at all.
The nozzle fits onto the exhaust pipe and reduces noise levels
You can buy a silencer at a regular car store; the main thing is to choose the right size of the product. The easiest way is to make a silencer with your own hands, especially since the material you will need is just a piece of metal pipe up to 20 mm in size:
- Measure the diameter of the exhaust pipe on the car.
- According to this size, select a round-shaped base for the plug so that it can easily fit into the pipe.
- In the center of the plug you need to drill a hole and weld a tube with a diameter of up to 20 mm into it.
- In this case, welding work must be carried out in such a way that the tube protrudes from the base of the plug by 10 or 15 mm.
- After this, you can drill several holes for bolts on the sides of the base (the plug will be bolted to the pipe).
- Of course, holes of the same diameter must be drilled on the exhaust can so that the silencer can be inserted into it and securely fastened.
In this case, you can make the silencer both internal and external, depending on the owner’s preferences. In the first case, the plug will go into the exhaust pipe, and in the second, it will be put on top of it.
Straight-through mufflers allow you to personalize your car. The powerful roar of the exhaust and the simple design of the pipe give the car a special charm in the eyes of the owner. Only forward flow can significantly increase the dynamics of the motor. Before installing such a muffler on your car, you need to think carefully: won’t the roar of the exhaust bother your neighbors?
Source: http://motorltd.ru/pryamotochnyiy-glushitel-svoimi-rukami/
Do-it-yourself direct-flow muffler, is it worth installing it on your car?
A direct-flow muffler is usually used for tuning sports cars, but recently such devices, for the purpose of tuning the exhaust system, have begun to be installed on VAZ, Mitsubishi Lancer 10, Mazda 3 and other cars.
How effective is a direct-flow muffler and is it worth the trouble of installing it, and if YES, then how to do it yourself. We will consider these and other questions in this article.
What is a direct-flow exhaust system
To understand why to install a direct-flow muffler, you need to know how the car exhaust system works as a whole and what its tasks are.
Main goals:
The operating principle of the exhaust system is partly based on the law of inertia.
Thanks to the action of this law, a vacuum zone is formed behind the exhaust valve into which gases rush, and their place is immediately taken by a fresh portion of the fuel mixture.
This happens due to the fact that the phases of fuel intake and exhaust gases overlap each other, as is provided for in the design of modern engines.
After the exhaust valves are closed, next to the high-pressure zone formed as a result of exhaust gases escaping under pressure, another low-pressure zone is formed in the manifold, which moves along the exhaust pipe at the speed of sound.
Entering the muffler, the vacuum zone encounters resistance in the form of partitions, is reflected and goes in the opposite direction to the valves.
The ideal case is when this zone approaches the motor at the moment the valves open, but this depends on the frequency of the engine and the distance to the obstacle.
And since in modern cars such a distance is large, the vacuum zone from one cylinder, as a result, at the moment the valve opens, ends up in another, and not in the one from which it left.
Thanks to the design of the “spider” (exhaust manifold), where pipes of the same length are provided, the effect of vibration damping occurs, since the vacuum zones go from 4 pipes into one, where resistance is created at the junction of the latter, and they also partially dampen each other.
But the muffler plays a leading role in noise reduction, because the exhaust manifold and other elements are unable to greatly reduce noise.
But on many sports cars such a device may not be found; the role of a muffler there is played by a special turbine, which smoothes out vibrations and reduces the force of the exhaust by grinding the outgoing gas flow.
Types of devices
The standard exhaust system of a modern car includes a resonator (the first one comes from the engine) and the muffler itself.
The resonator cuts off low-frequency vibrations, and the muffler cuts both low-frequency and high-frequency vibrations, which together leads to a good result.
But the above scheme, both jointly and separately, may include the following types of mufflers:
Aluminized steel
Devices made of aluminized steel are characterized not only by a long service life, from 5 to 10 years, but also by a high price.
It will be difficult to choose such a muffler for your car, since only a few companies produce such devices, and making it yourself will be problematic.
Stainless steel
The devices are in the inexpensive segment, but their service life is only from 2 to 5 years. A big plus is that you can match the element to almost any car.
Limiters
They are usually used as an additional device installed in front of the main one.
The operating principle is based on creating low acoustic resistance.
Structurally, this is done like this: in the pipe, a large diameter turns into a small one, then there is a sharp increase in volume according to the principle of a large bottle with a narrow neck. The sound, entering a large space, decreases.
Reflectors
Used as a secondary muffler installed after the main one.
Exhaust gases entering the device encounter a group of acoustic mirrors on their way. Reflecting from them, the gases dissipate their energy one by one, and the output is a weak sound.
Absorbers
Can be used as a main muffler. The principle of operation is based on the absorption of vibrations by a porous material, usually glass wool, the fibers of which are heated by oscillating, thereby converting sound into thermal energy. Structurally close to direct-flow analogues.
They are considered ineffective because they absorb only high-frequency vibrations and transmit low-frequency ones.
Resonator type
As a rule, they are used first in exhaust systems as additional ones.
The principle of noise absorption is based on the presence of chambers of different sizes, through which the sound is effectively muffled.
Everything is arranged like this: a pipe with slots passes through the center of the resonator, which is surrounded by chambers of different volumes. Through the slits, exhaust gases enter the chambers where their energy is lost.
After this, the sounds enter the main device, where they are further reduced.
Direct flow
They are also called sports mufflers. As a rule, they are made of stainless steel. Installed on sports and tuned cars.
After installing a direct-flow muffler, the suction of the air-fuel mixture into the cylinders is improved, and the resistance in the exhaust system created by conventional analogues is reduced.
A direct-flow muffler is structurally somewhat similar to a resonator; there is the same pipe with holes and empty cavities separated by partitions. Only the cavities themselves are filled with basalt wool (or other material), which can withstand high temperatures.
Consisting of long mineral fibers, basalt wool absorbs sounds well, but only until it is blown out of the direct flow and even special protective metal mesh does not save the situation.
If the direct-flow muffler, when you tap on it, begins to sound like an empty metal container, then it needs to be filled again with cotton wool or replaced. And the sound produced by the exhaust system will be different.
Sounds made and their features
After installing a direct-flow exhaust system, the sound emanating from the car immediately changes; as a rule, it is low-frequency “growling”, “bass” and “mumbling”.
This happens because mineral wool placed in the co-current cavities removes only the high frequencies, while leaving the low bass unchanged.
The resistance to exhaust gases is also greatly reduced, and this affects the increase in engine power (but only in combination with other measures).
But the nature of the sounds largely depends on the number of holes and their diameter in the central pipe, as well as the characteristics of the material embedded in the cavity.
As was noted, mineral wool does not support low frequencies, and in most cases the engine produces sounds in the low range.
Therefore, it is not surprising when a car with direct flow makes sounds of engine operation through the muffler, and the higher the frequency the latter operates, the more it clogs the ears.
This is felt especially well inside the car, when such sounds, coinciding in frequency with body vibrations (and they are close to the frequency of the engine), lead to resonant vibrations inside the car and the strength of the sound increases significantly.
Therefore, it is almost impossible to make a quiet direct-flow muffler.
Power and forward flow, three different opinions
Many owners of VAZ cars or, for example, Mitsubishi Lancer 10, Mazda 3, installing direct-flow exhaust systems on their vehicles pursue several goals, as a rule, there are two of them:
The first opinion is that this is true. There is no debate about tuning; we are missing this point. But there is another opinion about increasing power, and it is the opposite.
The second opinion is that a sports muffler without deep tuning of the engine will not give an increase in power and partly it coincides with the opinion of experts.
The third opinion from professionals is that a noticeable increase in engine power is possible only after significant processing, and a direct-flow muffler is a secondary part of the issue.
The tuned power unit produces more exhaust gases, and, therefore, the standard exhaust system will not cope with its tasks, especially at high speeds.
Therefore, it will be necessary to increase the diameter of all pipes, install a tuned manifold, and only then a direct-flow muffler.
It is on sports cars that they install not simple engines, but ones that require special attention. And the direct-flow exhaust system fits into the overall picture of the tuning engine.
Making a direct-flow muffler with your own hands
If you want to manufacture and install direct flow on your car, then it is better to conduct such experiments with domestic cars, for example, VAZ.
It is better to tune the exhaust system of Mitsubishi Lancer 10, Mazda 3 and other foreign cars by contacting special companies that do this professionally.
We discussed the design of the direct flow above. The difference between a sports muffler and a regular muffler is shown below.
We will be tuning the exhaust system of a VAZ-2110 (8 valve 1.6 liter volume).
To do this you will need the following materials and tools:
Work progress
Dismantle the old device or prepare a similar one taken, for example, from disassembly.
Cut out the gutter and all the insides as shown below.
Leave a 4 cm protrusion on both sides so that a new pipe can be welded into this area.
Prepare a new pipe by cutting it to size and drilling holes with a diameter of 6-8 mm in it at a distance of 1-2 cm from each other.
This is labor-intensive work, so you can use an alternative method - using a grinder with a 1.6 - 3.2 mm disc, cut holes in the pipe in the shape of a herringbone at a distance of 1-2 cm from each other.
Weld a pipe with holes to the sections in the muffler and fill the entire space with metal pipe cleaners.
On the reverse side, the electrode may be missing, no problem, the hole left will be additional to the rest drilled or sawn. But if you go by principle, you will have to cut out the other side of the muffler.
Weld the outer part back and, if necessary, update the pipe running from the forward flow towards the exhaust.
Completely clean the device, prime it with primer and paint, this will extend its service life.
It’s worth taking a closer look at the filler. In the example described above, a metal mesh was used, but still the best option would be expanded clay (in the middle), and put fire-resistant mineral wool on top.
We make direct flow from scratch
To do this you will need to use the services of a turner. We order two pipes:
Two flanges with a diameter of 130 mm with an internal hole of 52 mm, metal thickness 2-2.5 mm can be ordered separately.
Prepared:
Asbestos rope is wrapped around the inner pipe. This is done in order to protect the mineral wool, which will be the top layer, from overheating.
We fill the top layer, assemble and scald the structure. We weld the fasteners and attach the forward flow to its regular place. For beauty, you can put a muffler attachment on it.
Another design of the device is shown below.
Blueprints
There are a lot of ways to make a direct-flow muffler; the main thing here is to understand the principle of operation of the device and use your imagination. And for car owners who find it difficult to do this, use the methods and drawings described above, they are simple and accessible to many.
Also tell us in the comments what type of forward flow is installed on your car and how you can do it yourself, this will help many people understand this topic.
Source: http://plazaauto.ru/post/33149
Exhaust system tuning, manufacturing and installation of a direct-flow muffler, how to make a sports muffler with your own hands
string(10) “error stat”
Tuning the exhaust system involves not only modifying it, but also making adjustments to the exhaust gas removal system itself.
It is aimed primarily at increasing the rate of removal of combustion products of the working mixture in the engine, increasing the power of the car and giving the sound it produces some aggressiveness and power.
Tuning at service centers is often ordered by young people, wanting to express themselves, make the car recognizable, show their coolness and disdain for others. For adults, the powerful sound from the silencer does not amuse, but irritates.
Therefore, if you decide to tune the exhaust system of your own car, you must be prepared to work with the entire exhaust system. Because otherwise, you cannot avoid confrontation with neighbors who will feel uncomfortable listening to the powerful sound coming from under your car.
An important matter in preparing for this peculiar improvement is the selection of material. It must be able to withstand the flow of hot gas for a long time.
This system works on a fairly simple principle. Hot exhaust gases enter the exhaust pipe and, without encountering any obstacles on their way, fly out. Considering that sound travels around its source, that is, the hot gas escaping from the engine, the holes in the resonator dampen its high frequencies.
We offer several options on how to make a sports muffler and improve it yourself.
How to make a straight-through muffler? Option 1
We take a suitable muffler, maybe the one installed on the car, the main thing is that it is not too worn out. You will need two pipes of suitable size. In addition, you will need:
- "Bulgarian" - angle grinder;
- welding machine;
- measuring tape or folding ruler;
- electric drill;
- filler. These could be dish brushes, glass wool, asbestos strip;
- nozzle or tip for muffler.
First, using a grinder, cut the muffler and remove all the contents from it. We cut off the inner pipe so that the branches remain. We take a pipe with a diameter smaller than the muffler. We make many holes in it, the diameter of which should not exceed 8-10 mm. The more there are, the better. In this case, you can make not only holes, but also cuts in the form of a “herringbone”.
We cut off the ends so that it fits between the input and output processes, which we prudently left. We place the pipe between them and weld it together using welding. The connection is made along its entire circumference. After this, the ends of the pipe are welded to the outlet openings. The voids not occupied by the welded pipe are filled with heat-resistant, non-flammable material.
You can use metal sheets to divide the voids into sections and fill each of them with a specific filler. It is important that the packing is as dense as possible. After this, the casing is welded. When carrying out this work, you need to be extremely careful and careful not to leave any gaps or gaps.
To complete the tuning of the exhaust system, the exhaust nozzle is welded.
After that, we install a direct-flow muffler and enjoy the sporty sound with low tones.
We create a direct-flow muffler with our own hands according to the second option
To install a direct-flow muffler you will need:
- angle grinder;
- pipes of the required diameter;
- welding machine;
- heat-resistant insulator;
- stainless steel sheet.
Pipes and sheets must be made of heat-resistant steel.
When making a direct-flow muffler, it is necessary to cut off the walls of the old one and remove structural elements from it. Then you need to make a hole in the new pipe, which in diameter corresponds to the pipe of the standard muffler. Such holes are made in the places where these two elements are welded.
Next, a pipe is welded onto it, which has a diameter of 20 cm and a length of 1 meter. After this, the structure we created is placed in the muffler housing, which is subsequently filled with a sealant that is resistant to elevated temperatures. Next, the body is welded on both sides.
This work must be done carefully to prevent damage to the housing.
To ensure the reliability of this design, it is necessary to provide an overlap of at least 5 cm on each side. Finally, the holder ears are welded and the muffler is mounted on the workplace.
Tuning a muffler or installing a direct-flow muffler is possible not only on passenger cars, but also on motorcycles and mopeds. This is done for the same purpose as altering this element on a passenger car.
Tuning a moped muffler
To install a direct-flow muffler on a moped (motorcycle) you will need:
- mineral wool;
- two suitable pipes of different diameters;
- grinding machine - “grinder”;
- welding machine.
The procedure for installing a direct-flow muffler for a motorcycle:
- remove the old muffler;
- Using a grinding machine, we cut a hole in the resonator along its entire length;
- we create parts of the resonator - stiffeners and cut out two pipes;
- a pipe of a smaller diameter is wrapped with an insulator (glass wool), after which we insert it into a pipe with a larger diameter;
- Using a welding machine, we weld it.
To eliminate the possibility of glass wool getting wet, it is necessary to weld its components at a high level of quality, very carefully, without allowing any leaks.
Tuning the exhaust system of a moped allows you to increase real power and make it faster. At the same time, the effect of a significant increase in power is observed only in mopeds. You shouldn’t expect the number of horsepower to increase after tuning the exhaust pipe of a passenger car; this is more of an image move.
Install forward flow - change the image of your car
The forward flow will change not only the sound of the car, but also its appearance. In this case, you can install not one, but two nozzles. Place them in different corners or bring them out on one side in paired form.
A straight-through or straight-through muffler can be painted in different colors, but the most common are silver and metallic.
You can, of course, pick up an exhaust pipe in a store, find a universal product, but it will cost a decent amount of money.
If you don’t have them or want to save money, then it’s better to use the information above and create a homemade one. But at the same time, you must have the skills to work with an angle grinder and a welding machine.
Be able to do the work accurately and have enough time to complete it.
Source: https://SwapMotor.ru/vyhlopnaya-sistema/pryamotok.html
How to make a direct-flow muffler with your own hands |
One of the types of tuning of any modern car is modification of the exhaust gas system, which allows you to slightly increase engine power.
A homemade sports muffler allows you to achieve an increase in power due to the rapid passage of exhaust gases through the muffler, which creates conditions for an accelerated, in comparison with the usual mode, flow of the combustible mixture into the combustion chamber.
Another result of the refinement of the exhaust gas removal system is a slightly more powerful roar of the engine (of course, within reasonable limits), which allows the owner of the car to stand out from the bulk of motorists.
How to make a direct-flow muffler yourself? When modifying the exhaust system, it is necessary to take into account the main features of its functioning.
As you know, the exhaust system removes exhaust gases from the engine and ensures that the engine cylinders are filled with the combustible mixture in the optimal amount. The muffler of any car contains a complex of bends and partitions, during the passage of which the exhaust gases lose their energy, as a result of which the exhaust sound becomes quiet.
There are two ways to make a sports muffler, one of which involves altering the system of bends and partitions. To implement this option, you will need the following tools and materials: – grinder; - welding machine; – pipe of the required diameter; – metal brushes and sponges used for washing kitchen utensils.
How to make a direct-flow muffler from a pipe and metal jaws? Very simple. To do this, you need to remove the muffler from the car. Next, on the dismantled muffler, you need to cut out the upper part of its casing along the perimeter with a grinder, and then remove all the internal partitions.
A pipe of appropriate diameter prepared in advance will serve as the main structural element of a direct-flow muffler, so it is necessary to drill the maximum possible number of holes in it.
A pipe prepared in this way should be placed in the muffler cavity and welded to the body, the free space around it should be tightly filled with metal jaws, the previously cut out upper part of the casing should be installed in place and welded hermetically.
A muffler made in this way does not create any noise in the cabin at speeds up to 2500-3000 rpm; an increase in angular speed leads to the appearance of a rich, powerful roar of the engine.
How to make forward flow from a regular muffler
A direct-flow muffler may have a slightly different device. To implement the second option, you will need two pipes with a diameter of 2.5 mm and 130 mm, and a length of 400 mm. In this case, a pipe of smaller diameter must be perforated. You will also need two flanges with an outer diameter of 130 mm and an inner diameter of at least 2.5 mm.
After all the materials are present at the workplace, we proceed to the manufacture of the muffler. To do this, we weld flanges to the perforated pipe on both sides, wrap the surface of the smaller pipe with asbestos or glass wool so that the insulating material does not protrude beyond the outer diameter of the flange.
Then, we place the perforated pipe, wrapped in insulating material, into a pipe with a diameter of 130 mm and weld it to the flanges.
If the answer to the question: “How to make a direct-flow muffler yourself?” causes difficulties, you can try to find a ready-made solution in one of the online stores of the relevant focus.
The cost of such products, as a rule, ranges from 3,000 rubles and above.
Avtosotka
Source: http://avtosotka.ru/kak-sdelat-pryamotochnyj-glushitel-svoimi-rukami.html
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