Ford Mustang Forum - View Single Post - This pulley buisness..
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post #2 of (permalink) Old 11-27-2005
greenfieldracin
 
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Joined: Jan 2005
Posts: 173
 
By going to an underdriven pulley, u are allowing the engine to spin easier because it has to spin the acessories (alternator, water pump) less thust adding power and better mpg.

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