LT1-LT4 Modifications 1993-97 Gen II Small Block V8

what size belt for light weight udp

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Old 10-15-2007, 08:47 PM
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Default what size belt for light weight udp

Ok so I have a lightweight underdrive pully and it was smaller than my stock one. So I need to know what belt to purchase, can someone just give me the specs on the belt they purchased for there lightweight udp because I have no clue what brand this one is. I really dont want to just randomly purchase belts and start guessing so please help and thanks again!
Old 10-16-2007, 04:16 PM
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I also can't put the old one on because one of the bolts is sheared on this one.
Old 10-16-2007, 04:29 PM
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The instructions SHOULD have told you what size, which the pulley should have a part number on it somewhere. When you find it, google it + Underdrive Pulley. Or post it here. I would find out the stock size for your car and post that. Or the part number at least, so we can decipher the size

Example if you don't know: 8060620 is a 6 Rib, 62 inch belt. I don't remember what the 8 means. I think there are 70 series as well. An 8050505 Is a 5 Rib, 50.5 inch. Some list it as like 60620, or I think 6208060 as well.

I think the general change is 2 or 3 inches. So if it's a 62" then you'd want a 60 or 59". So 8060590 or 8060600. Alternatively, if it's a 1/2 inch to start, then it'd be like 8060625 to start, then 8060595 or 8060605.

Hope that is at least a start for you. And I hope I didn't insult you if you knew all that already. I tend to dumb things down too much, assuming people don't know, but it covers all the bases, if you follow me.
Old 10-16-2007, 04:35 PM
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It was spray painted black and I can't find any markings on it, I will have to get the belt info when I get home/
Old 10-16-2007, 04:39 PM
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Originally Posted by pooker
It was spray painted black and I can't find any markings on it, I will have to get the belt info when I get home/
Carb cleaner, or brake cleaner should take the paint off. Otherwise, soak it in parts cleaner over night. And please be careful, parts cleaner is VERY caustic. I got very mild chemical burns on my hands last time I used the Something-Berry white with red and blue striped, brand. Rubber gloves didn't help much. They lasted a short while before pretty much melting and falling apart lol




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