Overhead camshafts are found in about every modern-day vehicle. Their job is to open and shut the inlet and exhaust valves at just the right time to permit the motor to go throughout its combustion cycle. The timing of a camshaft is essential to permit the motor to reach best possible power output and efficiency.
When you purchase a standard vehicle, the motors camshaft assembly will be set up by the manufacturer to a predetermined timing value, which in most cases cannot be easily modified. The camshaft timing will typically be setup for reliability rather than peak performance; this means that more power can be gained if the camshaft timing was to be modified. There are a couple of ways that the camshaft timing can be modified, but the easiest and most user-friendly way is through the use of adjustable cam-gears. Adjustable cam-gears can be purchased for a vast number of vehicles and in most cases they are a direct bolt on fit. They come in numerous styles, finishes and colors and can to bring life to an otherwise dull engine bay. The utilization of an adjustable cam gear permits you to advance or retard the timing by small amounts so that the valve timing can be tuned to obtain greater power. In a factory stock engine, the expected power gained by adjusting the timing would usually be very little, but in engine where extensive modifications has been done (e.g. aftermarket camshafts, addition of a turbochargers, milling, porting etc…) then enormous benefits can be expected by fine-tuning the timing. Alternately adjustable cam gears can be used to fine tune the valve timing to increase the fuel economy of your engine as well.
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