The main goal of the exhaust manifold is to provide better scavenging for engine.
Scavenging means removal of combustion product (exhaust gas) from the cylinder to outet environment.
The process of removal of exhaust gas from cylinder to outer environment is little tedious because of presence of KERS, Turbocharger, catalytic converter, EGR valve…and so…
Those makes little restrictions for the exhaust gas flow to the outer atmosphere. But design of the exhaust manifold must be overcome Back pressure of exhaust gas to cylinder.
Applications
- It reduces back pressure of exhaust gas to cylinder.
- It improves scavenging.
- Clean combustion happens.
Advantages
- Better design of exhaust manifold results Peak torque achieved at lower RPM
- Horsepower also increased.