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Old 03-15-2013, 11:05 PM   #1

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Smaller pulley...what belt size?

going from 3.5" to 3.0" pulley. will i need a tighter belt? edelbrock said stock belt size for eforce is 105.5" so would a 104.5" gatorback be too small? its the next size down...and im assuming the stock pulley is im questioning if its 3.75 for some reason lol...thanks
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Old 03-15-2013, 11:46 PM   #2
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Not sure about Camaro, but on my vette I have gone down 2 pulley sizes using the same belt. I would try the belt before buying a shorter one.
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Old 03-16-2013, 11:51 AM   #3
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the LS3 ...... comes with 3.75
The l99 ....comes with 3.5
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Old 03-16-2013, 11:56 AM   #4
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I just put the 3" pulley on mine. I know they changed the belt and if you PM me I will tell you the belt size. My car is in storage right now and I have the paper work in it. I can have it tonight for you.. I know they had to try a couple of belts until they got the right one.
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Old 03-17-2013, 03:09 PM   #5

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According to Edelbrock,

LS3 comes with 3.5" pulley

L99 kit comes with 3.875" pulley

Would be curious where your boost level is with the 3.0" pulley.

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Old 03-17-2013, 04:38 PM   #6

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I would think a good aftermarket belt tensioner would take up that slack but I may be wrong.

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belt, camaro, eforce, ls3, pulley

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