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Discussion Starter #1
Anyone bought an aftermarket alternator and found out that the after market alternator pulley is bigger? Nice any difference with the bigger pulley? Will it cause any damage?
 

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Mind if I do a J?
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3,251 Posts
Bigger pulley is for cars with ATI damper. Use OEM alternator pulley if you’re running stock crank pulley.
 

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as above ^^^ just saw that comment regarding using a bigger alt pulley for aftermarket crank pulley

I have a ATI damper just installed and a set of PHR pulleys. Is there a need to run a bigger alt pulley?
 

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Swagger Wagon
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415 Posts
In for answers, I have a ATI Damper from Titan

I heard you can kill alts at high RPM (8000) was planning to switch alt pulley but haven't done so yet.
 
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