The exhaust system is one of those key areas of a vehicle that affect performance as well as visceral appeal. A properly chosen exhaust system can improve performance by reducing exhaust gas back pressure (resistance to flow) while providing a more aggressive or substantial sound The two arenât necessarily tied together, though, as there are plenty of loud exhaust systems that rob power, while there are very quiet systems that improve performance.
Again, letâs go back to the premise that an internal combustion engine is a relatively complicated air pump. Think of a piston at top dead center in the cylinder. The first stroke sees the piston moving downward in the cylinder while the intake valve opens. This downward motion creates a suction that draws air and fuel into the cylinder. As the piston reaches bottom dead center on the intake stroke, the intake valve closes and the piston rises in the cylinder, compressing the air/fuel mixture (stroke two). When the mixture is compressed, the spark plug fires ... Distributed by Tubemogul.
