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Message: <blockquote data-quote="sexy" data-source="post: 8059709" data-attributes="member: 612355">Changing pulley size will help. Two things people need to understand is that high output alternators require a little higher RPM than a factory alt for idle voltage to be the same.Then you mentioned that as it heats up the voltage drops and thought that was strange. It is not it is exactly the way it should be alternators output goes down as heat goes up.The generation of heat by electric conductors carrying current. The degree of heating for a given current is proportional to the electrical resistance of the conductor. If the resistance is high, a large amount of heat is generated, and the material is used as a resistor rather than as a conductor.</blockquote>

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