Top 5 misunderstandings about exhaust modification which you not know

In the field of car modification, exhaust system modification is usually the first choice for many car owners. It is like the car's breathing system, which can enhance the performance of the vehicle, improve the exhaust efficiency, and give the vehicle a more dynamic and unique sound. However, behind this seemingly simple system, there are many misunderstandings that are easy to occur during modification.

Myth 1: The thicker the exhaust pipe, the better

A large-diameter exhaust pipe is like a huge horn. People mistakenly believe that it can release more exhaust gas and increase the power of the vehicle. However, it is not. A large-diameter exhaust pipe may cause the exhaust to be too rapid, like a short burst of power, but it will damage the engine's low-torque output.

Low torque refers to the torque output at low speeds. Low torque loss directly affects the smoothness of starting and accelerating the vehicle.

Myth 2: The exhaust system can be modified at will

The exhaust system is a precision-operated whole that requires coordination with each other to ensure the smoothness and efficiency of the entire system. However, some car owners ignore this when modifying. They may have replaced the high-performance exhaust pipe, but neglected to match other components such as catalytic converters and mufflers.

If these components do not match, the efficiency of the entire exhaust system will be greatly reduced, and it may even cause malfunctions and safety hazards.

Myth 3: The louder the sound, the greater the horsepower.

The modified exhaust sound can indeed add personality and passion to the vehicle. Many people even think that the louder the sound, the greater the horsepower. This concept is obviously wrong. For the exhaust system, the main parts responsible for silencing are the rear and middle parts of the exhaust, especially the muffler at the rear. However, before exhaust gas is discharged outside the car, it must pass through the exhaust manifold and three-way catalytic converter. device, the exhaust back pressure is not only controlled by the rear section.

Therefore, if you only modify the straight-discharge rear section, although you can get an exciting exhaust sound, the power output will not change, so louder sound does not mean greater horsepower.

Myth 4: The original exhaust system must be bad

Many car owners said that the reason for modifying the exhaust system was because the exhaust system used by the original factory was very poor, and they could even clearly feel that the exhaust of the vehicle was not smooth. In fact, the original exhaust system is usually a product designed based on various considerations such as the vehicle's power performance, environmental performance, fuel economy, and production cost. It is a more reasonable match with the vehicle's powertrain.

For small-displacement models with weak power, the original factory exhaust design is not smooth, but it optimizes the low-torque characteristics of the small-displacement engine itself, which can improve the exhaust efficiency at medium and low speeds, making it more suitable for urban roads. use.

For some car owners who pursue higher performance or personalized driving experience, they hope to get a better experience by modifying the exhaust system, but this does not mean that the original exhaust system is not good, but just personal needs. Different from preferences.

Myth 5: The lower the exhaust back pressure, the better

Back pressure refers to the pressure of exhaust gas in the exhaust pipe. It is the most important factor affecting exhaust performance. The level of back pressure can directly change the power output characteristics and maximum power of the engine, but it does not mean that the lower the back pressure, the lower the power. The better.

If the back pressure is too low, the exhaust will be too smooth at low speed and the air flow speed will be slowed down. This will affect the exhaust efficiency at low speed, reduce the torque output in the low speed area, and the vehicle's starting and acceleration will be awkward. Powerless. On the contrary, if the back pressure is too high, it will affect the exhaust efficiency. Of course, if you want to improve this, you can choose variable valve exhaust, which can not only take into account the back pressure requirements at low speeds, but also ensure that the exhaust can be made smoother by controlling the valve at high speeds.

All in all, exhaust system modification is a complex and delicate project, which requires everyone to be wary of various misunderstandings while pursuing performance and individuality. Only by truly understanding the principles and requirements behind modification, fully understanding the relevant knowledge, consulting professional modification service providers, and choosing an exhaust system that suits your vehicle and needs can the true value of the modified exhaust system be realized.