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Crank pulley size on serpentine systems?

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Old Jun 26, 2007 | 10:03 PM
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From: Bloomingdale, NJ
Car: 1985 Z28
Engine: 350
Transmission: T-5 5 Spd
Axle/Gears: Built 10bolt w/3.73s
Crank pulley size on serpentine systems?

Anyone know what is the diameter of the crank pulley on the stock serpentine systems? What about the later S10 Vortec systems?

I'd like to buy a used serpentine system and use the same belt for the Weiand blower, but would need to know what size to buy for it.
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Old Jun 27, 2007 | 07:52 AM
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Re: Crank pulley size on serpentine systems?

My 1991 350 is an 8" diameter. The blower crank pulley for my P1SC is also 8" diameter.
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Old Jun 27, 2007 | 11:39 PM
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trumps2000's Avatar
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15 Year Member
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Joined: Jul 2005
Posts: 459
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From: Bloomingdale, NJ
Car: 1985 Z28
Engine: 350
Transmission: T-5 5 Spd
Axle/Gears: Built 10bolt w/3.73s
Re: Crank pulley size on serpentine systems?

Thanks for the info AC. I thought these pullies were smaller. I checked the size on my brother's V6 Vortec Blazer and its got a 8" pulley as well. Guess I'm going to need an underdrive pulley for this to work.
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