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<blockquote data-quote="SPL140.2" data-source="post: 4052967" data-attributes="member: 559635">that is not entirely true, with a tensioner all it does is make the belt tighter, If you have a smaller pulley and use the stock belt and in some instances the alternator moves forward or backward to take up the slack of the stock belt, with a smaller pulley on the alternator you may have to push the alternator all the way back to tighten the belt, which will not make the smaller pulley spin faster and thats what you want.&nbsp; You want the smaller pulley on the alternator to spin faster than the stock one.&nbsp; FYI, if what you guys are saying is true why is it they put smaller pulleys on the alternator than whats on the stock and highly recommend not changing out pulleys from the stock alternator to the high output alternator??&nbsp; hmmnn<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite11" alt=":rolleyes:" title="Roll eyes&nbsp; &nbsp; :rolleyes:" loading="lazy" data-shortname=":rolleyes:" />MikeyB said it right you want to keep the ratio the same, crank pulley to alternator pulley and with the shorter belt the high output alternators pulley will spin faster.egg</blockquote>

[QUOTE="SPL140.2, post: 4052967, member: 559635"] that is not entirely true, with a tensioner all it does is make the belt tighter, If you have a smaller pulley and use the stock belt and in some instances the alternator moves forward or backward to take up the slack of the stock belt, with a smaller pulley on the alternator you may have to push the alternator all the way back to tighten the belt, which will not make the smaller pulley spin faster and thats what you want. You want the smaller pulley on the alternator to spin faster than the stock one. FYI, if what you guys are saying is true why is it they put smaller pulleys on the alternator than whats on the stock and highly recommend not changing out pulleys from the stock alternator to the high output alternator?? hmmnn:rolleyes: MikeyB said it right you want to keep the ratio the same, crank pulley to alternator pulley and with the shorter belt the high output alternators pulley will spin faster. egg [/QUOTE]

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