Thread: upgrading alt what belt size

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  1. #1 upgrading alt what belt size 
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    ok so i bought a high output upgrade kit for my alternator and pulley drop from 62mm to 52 mm.can anyone of you kind sirs tell me what size serpentine belt i need the car is a 1999 grant prix gt non supercharge
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  2. #2 Re: upgrading alt what belt size 
    Turbo is the way to go. BillBoost37's Avatar
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    Being a 10mm diameter pulley drop, I would try the stock belt you have sitting there first and see how the tensioner marks look. If you are out of spec, usually the smallest drop in belt length is about .5".
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  3. #3 Re: upgrading alt what belt size 
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    thank you....dude
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