Analysis of Engine performance and Emission of HPLPM Exhaust with Catalytic Converter Distance Variation

This research aims to measure the performance and emission of motorcycle engines using three types of mufflers. Original Equipped manufacturer (OEM), High Performance Low Pollution Muffler (HPLPM), and free flow exhaust were used in this research with various placement distances of the catalytic converter. This research utilized a quantitative method experimental approach. The independent variable used was the placement distance of the copper-based catalytic converter; 65 cm, 75 cm, and 95 cm. The fuel used in the vehicle was gasoline RON 90. Test data was collected at idle, 1000, 3000, and 5000 RPM. Performance testing involved engine rotations ranging from 3500 to 8500 RPM, with increments of 250 RPM and used 1:1 transmission ratio during testing. The results of the testing using the HPLPM exhaust integrated with the catalytic converter showed a reduction in exhaust gas emissions while simultaneously improving engine performance compared to the OEM exhaust. In this study, the catalytic converter installed in HPLPM exhaust positioned at 75 cm resulted in an effective reduction in exhaust gas emissions at each engine rotation, and it also enhanced vehicle performance, achieved the highest torque of 16.14 Nm at an engine rotation of 5500 RPM. As for the highest power, it reached 16.9 HP at an engine rotation of 8500 RPM.