About retrofitting the exhaust system, car exhaust system modification?

When you are not satisfied with the performance of your car, although you have tried some methods but the results are not obvious, or the exhaust pipe of the vehicle is aging and "banging" to drive, you have the opportunity to try the upgrade of the exhaust pipe in order to get more power performance than the original.

The key to performance is back pressure.

Because most of the family car engine cylinders do not have independent exhaust pipes, and at the same time, there are noise, space, overall configuration and mass production cost considerations, the exhaust pipe only has the purpose of simple sound reduction and cooling exhaust, so there will be the problem of exhaust is not smooth enough, and then reduce the due performance of the engine. The smoothness of the exhaust pipe, which is often referred to as "back pressure", is actually the resistance inside the exhaust pipe, which is related to the design of the plantain head, the thickness of the middle pipe diameter, the overall length of the catalyst, the angle, and the size of the muffler, and is directly reflected in the exhaust efficiency.

The main purpose of modifying the exhaust pipe is to reduce the back pressure and make the cylinder suction and exhaust more smooth, which is also a disguised extension of the valve overlap time to increase the exhaust volume, so it can change the characteristics of the engine and improve the response and power at high speeds. However, the lower the back pressure, the better, because if the exhaust is completely unhindered, the mixture will be discharged before it is completely burned at medium and low speeds, and the torque will inevitably be sacrificed, and even when the pressure in the pipe becomes lower when the oil is returned, there is also the possibility of exhaust gas flowing back to the combustion chamber, so a certain amount of back pressure is still needed.

Done according to personal habits.

Generally speaking, most of the exhaust pipe modifications start from the middle and tail sections, and the common methods are nothing more than thickening the pipe diameter, reducing the muffler, etc., emphasizing that the competitive class will work towards a straight line. The straight exhaust pipe is characterized by a shortened path and smooth corners, but it is important to note that the shorter exhaust pipe is aimed at horsepower output at high revs, while the slender type excels at torqueous performance at low revs. The reason is that the pressure in the latter pipe is high, and the exhaust gas will be discharged very quickly at medium and low speeds, but it will face the weakness of blockage at high speeds, and correspondingly, the former has the problem of slow flow speed at medium and low speeds, but the exhaust can be very smooth at high speeds.

Finally, it should be noted that when a larger diameter exhaust pipe is upgraded, the vibration generated by the new exhaust pipe may increase, and it is likely that the left and right will sway. At this time, it is necessary to replace the rubber seat with a hardened exhaust pipe to ensure that the joint does not crack.

After the engine does work, it will exhaust gases, and the quality of exhaust efficiency is directly related to the quality of engine efficiency. The original design favored a smaller engine sound, which affected the speed of exhaust and reduced engine efficiency. While the intake air is increased and the combustion is intact, the exhaust efficiency needs to be strengthened.

Now it is mostly changed to straight exhaust, that is, the middle and front sections of the exhaust system are changed, and the muffler and other purification devices are removed, so that the whole process of exhaust is shortened, and the exhaust gas is discharged after simple treatment, and the car will accelerate more quickly after improvement. The modified in-line barrel will have a deafening sound release when accelerating, but the resonance should not be too large, otherwise it will aggravate the driver's fatigue and irritability when driving the vehicle for a long time.

Generally speaking, the exhaust system is divided into three parts: the head, middle and tail.

The head section is the part where the engine is directly connected to the exhaust system. The effect of the facelift section on the improvement of power output is still quite obvious. However, if you're looking for a very explosive sound effect, it doesn't make much sense to change here.

In the middle section, this part of the increase in power is quite obvious. Because this part usually has a three-way catalytic converter and the first silencer. The changes will reduce exhaust drag, which in turn will improve the car's dynamic performance at high revs.

However, this move is also based on the sacrifice beam renting a part of the exhaust back pressure, so the performance at low torque will also be reduced.

But if you have a car with a large displacement engine, changing the middle section will give you a completely different experience.

In the tail section, many people will actually only spend money on the tail section. In fact, the tail section is like a silencer. The slag imitation does not help much to improve the power.

To put it bluntly, it is the easiest place to be seen and displayed. If you see that some cars on the road are very loud, but the acceleration ability and sound do not match, you know that this product has only changed the rear section.

The exhaust modification is divided into three parts: the front, middle and tail sections, and each model has a special exhaust modification, but it does not mean that all models have a special modification.

Just change to a spherical small straight row.

Generally, the exhaust pipe of the original factory has back pressure.

The back-pressure exhaust pipe is based on the change of the volume of the grating muffler or pipe in the pipe, which hinders the exhaust gas discharge to a certain extent, and produces a pressure that makes the exhaust gas return to the cylinder. When the engine is ignited, the piston begins radial force travel, and the exhaust valve opens before the piston reaches the bottom dead center. In this case, the back pressure in the exhaust pipe will block the exhaust gas from rushing out, so that the mixture can be completely combusted.

However, if the back pressure is too strong, the exhaust gas will not be able to completely discharge out of the cylinder, causing the exhaust gas to burn together with the mixture, reducing the combustion efficiency and affecting the horsepower output.

As a result, the back-pressure exhaust pipe makes the fuel burn more fully at low engine speeds, the torque performance is better, and the starting acceleration is faster. However, when the engine is at a high speed, it affects the exhaust gas, and part of the exhaust gas is burned together with the mixture to reduce the combustion efficiency and reduce the horsepower output.

The inline row is the opposite, with almost no back pressure. The engine has a low rpm torque difference, and a high rpm horsepower output.

Upstairs is right, the car with a small displacement and a small torque is not large, and if you change to a straight row, the low speed will be even worse.

So, it's up to you.

It is necessary to take into account the low-speed driving in the urban area at ordinary times, and choose the back pressure exhaust pipe. There are also many types of back pressure drums, you can replace the original one and choose one with moderate back pressure and good sound.

Yes, but the CO2 filter is removed, the sound becomes loud and loud, and the power and horsepower will increase a little bit.

Straight exhaust generally refers to the motorcycle bar, and the car exhaust is divided into the front end, middle section, and rear section. Generally, the modification is to change the exhaust tail section. After the change, the power will be increased to a certain extent, but the fuel consumption will also increase a little. Unless it's a super audiophile. In general, don't change the previous paragraph.

Changing to a straight row is sacrificing low torque to strengthen high turn.

Cars with low displacement should not be changed to straight rows, and they will be dissatisfied.