The joke of Volkswagen burning engine oil.

Visually, this car is about 25 years old and about 1.65 meters long. The car is in good condition, the interior is good, the exhaust is dark, and the engine oil burns badly. The engine is at its peak, but the cylinder is seriously pulled. Fifteen minutes later, the exhaust gas is discharged and water is directly injected into the cylinder. Beginners are not advised to start, and old drivers can take a taxi.

At this time, the back pressure in the pipe will prevent the exhaust gas from rushing out and make the mixture burn completely. However, if the back pressure is too strong, the exhaust gas can not be completely discharged from the cylinder, which will cause the exhaust gas to burn with the mixed gas and reduce the combustion efficiency. Of course, the most direct thing is to induce horsepower output. Its advantages: low noise and good low-speed torque. Disadvantages: exhaust gas can not be discharged quickly at high speed, which affects the power output of the engine and has a small volume.

Back pressure exhaust pipe:

(As environmentally friendly as the original factory) The principle is the same as the original factory, but the sound will be better than the original factory. Most of the original factories use this kind of pipeline, mainly through the grid muffler in the pipeline or the volume change of the pipeline, resulting in a pressure that will return to the cylinder. When the engine is ignited, the piston begins to make a radial power stroke, and the exhaust valve will open before the piston reaches the bottom dead center.