Automobile exhaust pipe classification

(1)Back pressure tube  
The back pressure in the tube stops the exhaust gas from escaping and allows the mixture to burn completely.  But the back pressure is too strong, will cause the exhaust gas can not be fully discharged from the cylinder, resulting in exhaust gas and mixture combustion together to reduce the combustion efficiency, of course, the most direct is to affect the horsepower output advantages: low noise, low speed torque disadvantages: high speed exhaust gas can not be quickly discharged, affecting the engine power output volume: low  
(2)half back pressure tube  
The power of the tube back pressure is low, compliance than the back pressure of exhaust control Simply put, it is between back pressure pipe and straight pipe have moderate back pressure to obtain the start torque Exhaust backpressure GuanJia compliance ratio, of course, the high speed torque is larger than the back pressure pipe advantages: did well up in the end speed torque Weakness: the noise is big volume: large  
(3)through the tube  
Acceleration will be better than back pressure, but the biggest disadvantage is very noisy, exhaust no resistance, low speed torque is poor, high speed torque is larger advantages: exhaust smooth, high speed torque is strong disadvantages: low speed soft force, loud noise volume: large. 
(4)Half straight pipe  
In fact, half straight pipe and half back pressure pipe is the same as the exhaust diameter than half back pressure pipe to the big advantage: the starting torque is lower than half back, but the high speed torque is large  
(5)Half double valve variable exhaust  

A variable exhaust system was attached to the exhaust line and a side pipe was added.  When one pipe is fully open and the other pipe is completely closed, there is a better sound effect than single valve variable exhaust, and when the opening degree is one-third, the sound effect is more single valve exhaust is basically the same.  Make it possible to switch the sound and change the sound size of the exhaust.