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The Terminator
Terminator Talk
Alternator pulley size
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<blockquote data-quote="IronTerp" data-source="post: 7358666" data-attributes="member: 12702"><p>The answer to your question is a matter of opinion and debate......there is no proven answer. <strong>The VAST majority of 2 lb lower users have retained the stock OEM 2.60" alternator pulley</strong>. </p><p></p><p>The 03/04' factory alternators have had a tendency to fail prematurely, regardless of the lower pulley or alternator pulley being used. Some folks feel that an "overspinning" phenomenom increases the risk of premature alternator failure. Some don't feel this way. My personal opinion is that unless you're cruising around at 3,000 to 4,000 RPM all the time, it just doesn't make that much of a difference. I ran a 4 lb lower with stock alt pulley for 15,000 miles and upgraded to a 3.20" only when I went to a 6 lb lower.</p><p></p><p>You can actually probably retain the 3.20" aftermarket alternator pulley with your 2 lb lower with no side effects.</p></blockquote><p></p>
[QUOTE="IronTerp, post: 7358666, member: 12702"] The answer to your question is a matter of opinion and debate......there is no proven answer. [B]The VAST majority of 2 lb lower users have retained the stock OEM 2.60" alternator pulley[/B]. The 03/04' factory alternators have had a tendency to fail prematurely, regardless of the lower pulley or alternator pulley being used. Some folks feel that an "overspinning" phenomenom increases the risk of premature alternator failure. Some don't feel this way. My personal opinion is that unless you're cruising around at 3,000 to 4,000 RPM all the time, it just doesn't make that much of a difference. I ran a 4 lb lower with stock alt pulley for 15,000 miles and upgraded to a 3.20" only when I went to a 6 lb lower. You can actually probably retain the 3.20" aftermarket alternator pulley with your 2 lb lower with no side effects. [/QUOTE]
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Alternator pulley size
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