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ABSTRACT At present, the use of cars as a mode of transportation has become a necessity for the public. The escalating fuel cost on present days has led to the search for alternative devices to reduce fuel consumption for cars. Due to this problem, a number of fuel saving products have been invented with the hope to improve the fuel consumption. These products include gas additives, fuel treatments, air filters, spark plugs, and aftermarket engine modifications. One of the products, which are known as Cyclone, is a non-moving device designed to enhance fuel economy by creating a swirling air motion, and thus resulting the air in the intake hose to move faster by continuously whirling around corners and bend. However, some of the products in the market may not increase mpg (miles per galloon) as claimed in their advertisements. Therefore this research project intends to investigate the effectiveness of Cyclone on fuel consumption of a spark ignition engine. In order to achieve the objectives, an experimental study to investigate the performance towards fuel consumption as a result of installing Cyclone is Multicylinder Test Bed Engine was done. The effect of the static blade angles in the Cyclone was also investigation by reproduction of two more units at different angles. In addition, a smoke test was performed to visualize the flow pattern of the air leaving the Cyclone, in order to relate its effect on fuel consumption
