Pengaruh Penggunaan Arak Bali Sebagai Bahan Bakar Pada Mesin Empat Langkah Dengan Rasio Kompresi Bervariasi

Arak bali is alternative fuel with highest contend of ethanol. Arak Bali with ethanol concentration more than 80 percent has octane number 108. Octane number which was higher can overcome a detonation, and can work at higher compression ratio engine. This experiment has done to now how the effect of compression ratio variation to the performance four strokes engine by arak Bali as fuel. This research was done by changing the compression ratio that is 8,8 : 1, 8,9 : 1, 9 : 1 and 9,3 : 1. The change was done by reducingOAJ clearance volume chamber by scrap the cylinder head. This reset has result, for the used arak Bali as fuel on the four stroke engine is, if engine compression ratio to increase can be influence to increasing engine performance and to decreasing engine fuel consumption. To premium is, if engine compression ratio is increase to influence of decreasing engine performance and to increasing engine fuel consumption.