PENGARUH PENAMBAHAN TURBULATOR PADA INTAKE MANIFOLD TERHADAP UNJUK KERJA MESIN BENSIN 4 TAK

ABSTRACTThis research aims to determine the effect of the blade angle variation of directional flow (turbulator) in the intake manifold 4-stroke motorcycles to engine performance. In this research, it was used three variations of blade angle 30o, 45o and 60o. This research was done using a motorcycle engine 113 cc Yamaha Jupiter Z manufactured at 2007. Investigation of torque and power of the engine was done on rotational speed from 3750 rpm to 10000 rpm, while fuel consumption test was conducted on rotational speed of 1000 rpm to 6000 rpm. From the results of this research, it can be concluded that the use of directional flow (turbulator) in the intake manifold with angle blade 30o has the best performance of the engine. It was indicated by high torque, high power, high BMEP and. The positive effect to the engine was also indicated by low fuel consumption and the high SFC on engine with angle blade 30o turbulator .Key words: engine, intake manifold, power, torque, turbulato