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Old 09-10-2011, 07:23 AM   #6 (permalink)
emilix123
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The VSS count is fairly straight forward. There is a device on your car that rotates and creates a certain number of pulses per revolution. The sensor is usually attached to your transmission and it has a direct gear ratio to your tires that I will call the rolling ratio. This sensor is used to feed the vehicle computer the speed and distance data. The actual gear ratio has only one main variation, and that is the tire diameter. For the MPGuino to calculate the the MPG, this input is critical for determining the distance traveled. The VSS count is typically measured in counts per mile.
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