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Reload this Page Underdrive pulleys, do you really need the alternator pulley?

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Old 10-25-2009, 08:32 PM   #1
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Underdrive pulleys, do you really need the alternator pulley?
Can I get away with the crank pulley only? Or will it really lower my alternator output?
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Old 10-25-2009, 09:12 PM   #2
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Re: Underdrive pulleys, do you really need the alternator pulley?
If you do a lot of sit-and-idle you'll want to do the alternator pulley. If you don't spend a lot of time idling, you don't absolutely need to change it. By the time you hit ~1200 RPMs the engine speed has more than made up for the difference in pulley ratio.
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Reload this Page Underdrive pulleys, do you really need the alternator pulley?
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