Title:
GEOMETRY DESIGN OF RACING EXHAUST SYSTEM ON L12B ENGINE

Authors:
Fitria Hidayanti , Erna Kusuma Wati and Kreshna Agusta Mulyo Adi

Abstract:
Geometry design of a special racing exhaust for the L12B engine has been done. This exhaust system is different from the previous standard exhaust system, the dimensions of this new racing exhaust system have been re-engineered to meet the specification of the racing exhaust system by stripping the catalytic converter, resonator and muffler to make free and faster fluid velocity. The diameter of the exhaust pipe is made to have a width of 1.5 inches rather than 1.75 inches which it is standard. Based on the results of CFD simulation measurements on the sample exhaust, the 1.5-inch exhaust pipe diameter resulted in an average fluid flow velocity of 15.43 m/s, while the 1.75-inch exhaust diameter width resulted in an average fluid flow velocity of 12.79 m/s.

Keywords:
Fluid velocity, Scavenging effect, Volumetric efficiency, Backpressure, Computational Fluid Dynamic