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Old 01-23-2014, 10:34 AM   #1
45th SS
 
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Whipple question!

I'm going to pulley down to a 3.875 pulley and was just curious if anybody knows the belt size/part number.
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Old 01-23-2014, 10:36 AM   #2
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I bet the guys in this forum would be able to help you out
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Old 01-23-2014, 11:19 AM   #3
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It's not even a full Inch. I would just try the one you have. Might be wrong but doesn't seem like it would be that big of a change.
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Old 01-23-2014, 11:45 AM   #4
bwk1971
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Quote:
Originally Posted by 45th SS View Post
I'm going to pulley down to a 3.875 pulley and was just curious if anybody knows the belt size/part number.
I'm running the same belt size as the 4" with no problems.
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Old 01-23-2014, 12:01 PM   #5
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+1

Quote:
Originally Posted by bwk1971 View Post
I'm running the same belt size as the 4" with no problems.
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Old 01-23-2014, 01:13 PM   #6
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Yep, the stock Whipple belt will work.
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Old 01-23-2014, 03:15 PM   #7
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Yep ... same belt ... re-adjust your idler pulleys if necessary. Make sure the casted marker lines on the tensioner still line up.
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Old 01-24-2014, 11:39 AM   #8
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Is this a good belt and the right size for a 4.0/3.875" pulley? Goodyear 4060955 Gatorback Poly-V Belts
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Old 01-24-2014, 10:38 PM   #9
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Quote:
Originally Posted by Drottie View Post
Is this a good belt and the right size for a 4.0/3.875" pulley? Goodyear 4060955 Gatorback Poly-V Belts
That's the belt I use and I am using a 3.875 pulley.
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