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Descriptive Analysis

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Submitted By Rockkilla
Words 366
Pages 2
Steve Schiavo
03/24/2009
Analysis By Division

VROOM, VROOM!!
In the sport of import drag racing the most impressive and important machine has to be the racing engine itself. This complex machine whose internal workings as well as external systems must work together in perfect harmony to achieve the high power and high speed that this sport requires. This extraordinary ballet begins with the high-octane fuel located in a fuel cell in the rear of the vehicle being pumped at a high volume and high pressure forward to the high flow fuel injectors located on the engine. This forces a superfine highly combustible mist into the engines cylinders ready to be ignited by the spark plugs on the compression stroke. The fuel injector and spark timing is controlled by a professionally programmed engine control unit or ECU which has been fine tuned over many previous runs down the track. This “computer” of sorts uses many data sensors located on the engine in key information locations such as engine revolutions, intake air temperature, exhaust gas temperature and turbocharger boost pressure. The most important information is the turbocharger boost pressure. The turbocharger uses the spent exhaust gas from the engine to drive a turbine which intern pressurizes the air entering the intake of the engine. This extra power is called, “free power” since it does not use any power from the engine to drive the turbo. Since an engine is essentially an air pump, the more pressure you force into the intake, the more potential power you can make. These immense pressures can sometimes reach 4 to 5 times atmospheric pressure. As the exhaust leaves the turbocharger and heads on its fiery journey towards the back of the car it travels through a large, high-flow exhaust which does not create any backpressure, causing a loss of power from the restriction of the exhaust leaving the

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