Studi Eksperimen Penggantian Camshaft Pada Mesin LM4 Guna Meningkatkan Performa Kendaraan Drift

Naibaho, Stephano Reguelo Toton (2025) Studi Eksperimen Penggantian Camshaft Pada Mesin LM4 Guna Meningkatkan Performa Kendaraan Drift. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Performa mesin memegang peran penting dalam dunia drifting, terutama pada kelas Pro1 di Indonesia di mana rata-rata kendaraan memiliki tenaga setidaknya 350 HP. Mesin LM4 berkode V8 dengan kapasitas 5.3L yang datang dari mobil SUV keluarga, dalam kondisi standar hanya menghasilkan sekitar 210 HP, sehingga akan sulit untuk menjadi kompetitif. Penelitian ini bertujuan untuk meningkatkan performa mesin LM4 melalui penggantian camshaft, dengan fokus pada pengaruh parameter lift, duration, dan lobe separation angle terhadap daya dan torsi mesin.
Metode eksperimen dilakukan menggunakan chassis dynamometer untuk mengukur daya dan torsi mesin dalam kondisi standar dan setelah penggantian camshaft. Selain itu, pengujian dilakukan pada tiga variasi Air-Fuel Ratio (AFR) yakni 12:1, 13:1, dan 14:1. Parameter Specific Fuel Consumption juga diukur sebagai indikator efisiensi.
Hasil menunjukkan bahwa penggantian camshaft meningkatkan daya maksimum dari 201 HP menjadi 275 HP (naik 36,82%) dan torsi dari 240 ft-lb menjadi 249 ft-lb (naik 3,75%). AFR 13:1 memberikan performa terbaik dibandingkan AFR kaya dan miskin. Namun, penggantian camshaft menyebabkan peningkatan SFC, yang berarti konsumsi bahan bakar meningkat. Temuan ini menegaskan bahwa penggantian camshaft dapat meningkatkan performa mesin, meski dengan kompromi pada efisiensi bahan bakar.
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Engine performance plays a crucial role in the world of drifting, especially in the Pro1 class in Indonesia, where vehicles typically produce at least 350 HP. The LM4 V8 engine with a 5.3L displacement, originally designed for a family SUV, produces only around 210 HP in its stock configuration, making it less competitive. This study aims to enhance the performance of the LM4 engine by replacing the camshaft, focusing on the influence of lift, duration, and lobe separation angle on engine power and torque.
An experimental method was employed using a chassis dynamometer to measure power and torque under both standard and modified camshaft conditions. Additionally, tests were conducted with three different Air-Fuel Ratio (AFR) settings: 12:1, 13:1, and 14:1. Specific Fuel Consumption (SFC) was also measured as an indicator of engine efficiency.
The results show that camshaft replacement increased maximum power from 201 HP to 275 HP (a 36.82% increase) and torque from 240 ft-lb to 249 ft-lb (a 3.75% increase). The 13:1 AFR delivered the best performance compared to richer and leaner mixtures. However, the camshaft replacement also led to an increase in SFC, indicating higher fuel consumption. These findings confirm that camshaft modification can significantly enhance engine performance, albeit with a trade-off in fuel efficiency

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Camshaft, Daya, Torsi, Air-Fuel Ratio, Specific Fuel Consumption,Camshaft, Power, Torque, Air-Fuel Ratio, Specific Fuel Consumption
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ785 Internal combustion engines. Spark ignition
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Stephano Reguelo Toton Naibaho
Date Deposited:	04 Aug 2025 03:04
Last Modified:	04 Aug 2025 03:04
URI:	http://repository.its.ac.id/id/eprint/126291

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