PENGARUH MODIFIKASI DIAMETER INTAKE & EXHAUST KEPALA SILINDER TERHADAP UNJUK KERJA MOTOR MATIC 110CC SKRIPSI

Ravy Revanza; Moh. Yusuf Djeli;

PENGARUH MODIFIKASI DIAMETER INTAKE & EXHAUST KEPALA
SILINDER TERHADAP UNJUK KERJA MOTOR MATIC 110CC

Ravy Revanza

Saluran intake port dan exhaust pada kepala silinder bisa mempengaruhi unjuk kerja sepeda motor.
Pada umumnya sepeda motor mempunyai saluran permukaan kasar yang bisa menyebabkan kotoran
yang ada di bahan bakar dan sisa-sisa gas hasil pembakaran menempel pada dinding saluran intake
port dan exhaust. Untuk mengatasi masalah tersebut biasanya dilakukan proses porting polish.
Tujuan penelitian ini untuk meningkatkan unjuk kerja sepeda motor dan mengetahui pengaruh
modifikasi diameter saluran intake port dan exhaust. Pada motor matic 110cc yang masih standar
memiliki nilai torsi tertinggi 11,40 Nm pada putaran mesin 3330 RPM, daya tertinggi 6,2 HP pada
putaran mesin 6037 dan konsumsi bahan bakar spesifik 0,184 Kg/HP.jam pada putaran mesin 5000
RPM. Sedangkan motor matic 110cc yang sudah di modifikasi memiliki niilai torsi tertinggi 16,11
Nm pada putaran mesin 2644 RPM, daya tertinggi 7,2 HP dan konsumsi bahan bakar spesifik 0,166
Kg/HP.jam pada putaran mesin 5000 RPM. Menunjukkan bahwa motor matic 110cc yang sudah di
modifikasi pada saluran intake port dan exhaust bisa meningkatkan unjuk kerja sepeda motor.
Kata kunci: porting polish, torsi, daya, konsumsi bahan bakar

THE EFFECT OF MODIFICATION OF INTAKE & EXHAUST CYLINDER
HEAD DIAMETER ON THE PERFORMANCE OF 110CC MATIC

MOTORCYCLE
Ravy Revanza

The intake port and exhaust channels on the cylinder head can affect the performance of a
motorcycle. In general, motorcycles have rough surface channels that can cause dirt in the fuel and
remnants of combustion gases to stick to the walls of the intake port and exhaust channels. To
overcome this problem, a porting polish process is usually carried out. The purpose of this research
is to improve motorcycle performance and determine the effect of modifying the diameter of the
intake port and exhaust channels. The standard 110cc matic motorcycle has the highest torque value
of 11.40 Nm at 3330 RPM engine speed, the highest power of 6.2 HP at 6037 engine speed and
specific fuel consumption of 0.184 Kg/HP.h at 5000 RPM engine speed. While the 110cc matic motor
that has been modified has the highest torque value of 16.11 Nm at engine speed 2644 RPM, the
highest power of 7.2 HP and specific fuel consumption of 0.166 Kg / HP.hour at 5000 RPM engine
speed. It shows that the 110cc matic motorcycle that has been modified in the intake port and exhaust
channels can improve the performance of the motorcycle.
Keywords : porting polish, torque, power, fuel consumption