Since the first combustion engine vehicle was manufactured, designers and engineers have been looking for an effective way of increasing power. Building bigger engines seemed to be the only solution for quite some time until it was realized that as engines got bigger so did their size, cost and weight. This is why nowadays engineers and car designers are using a different kind of approach which consists in modifying an already manufactured engine in order to increase its overall output.
Bibliography: 1. John DeCicco, (2007, March 28). Environmental Defense automotive expert. [Online]. Retrieved from: http://www.greenoptions.com/blog/2007/03/28/environmental_defense_cost_cutting_car_tips_that_lower_your_carbon_footprint 2. Michael Brian Sullivan, (2005, September 20). Intake manifold with EGR/air mixing. [Online]. Retrieved from: http://www.google.com/patents?vid=USPAT6945237 3. Wikimedia Foundation, Inc. (2007, March). Car tuning. [Online]. Retrieved from: http://en.wikipedia.org/wiki/Car_tuning 4. Ulrich Gobert, Ola Danielsson, (1992, September). Method and a device for engine braking a four stroke internal combustion engine. [Online]. Retrieved from: http://www.google.com/patents?hl=en&lr=&vid=USPAT5146890&id=GE4cAAAAEBAJ&oi=fnd&dq=how+engine+works (Google Scholar) Fig3 from: http://static.howstuffworks.com/gif/hemi-diagram.gif Fig2 from: Ulrich Gobert, Ola Danielsson. Method and a device for engine braking a four stroke internal combustion engine. Adapted by us to show valves and pistons. Fig1 from: http://en.wikipedia.org/wiki, Adapted by us: We joined two different pictures together and inserted the legend.