alternator decouplers

How Do I Know What Size Pulley I Need For My Alternator?

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How Do I Know What Size Pulley I Need For My Alternator? Divide your alternator pulley size into your crank pulley size to get the ratio. Example: If you have a 6′′ crank pulley and a 2′′ alternator pulley. 6/2=3. You have a 3 to one ratio, you multiply your engine RPM by 3 so

Why Do Alternators Have Clutch Pulleys?

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Why Do Alternators Have Clutch Pulleys? As opposed to traditional solid pulleys, they allow the alternator to “free-wheel” or “overrun” every time the engine decelerates and, at the same time, dampen vibrations at the alternator. They come in two types: one-way clutches (OWCs) and overrunning alternator decouplers (OADs). What is the function of pulley in