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Old 08-04-2013, 07:56 AM   #1
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Default need help finding the right belt

I currently have the following pulley and belts in my car
center 16t
drive pulley 36t
belt size,
front 123t
rear 106t
I want to put in 20t center pulleys and 37 turn drive pulleys, how would I figure out what size belts will work, thanks
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Old 08-04-2013, 09:26 AM   #2
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You're gaining 5 pulley teeth in total. Approximately half of the pulley teeth are in contact with the belt, so the belts need to be 2.5 teeth longer. Which puts you in a difficult position; you'll have to look at how tight your belts are at the moment plus the amount of adjustment available and make a judgement call between +2 or +3 teeth. Even then you're probably not going to get the ideal tension. Can you go for 19t pulleys instead? Or leave the 36t diff pulleys on.
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Old 08-04-2013, 10:41 AM   #3
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I know I would need new belts, not sure what size belts to get, thats what I need help with, the old belts will not work, and I would like to keep the 20t center and 37t diff pulleys, do I just add 5 teeth to the belt, or is there a proper way to calculate the lenght of belt I need, thanks
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Old 08-04-2013, 04:58 PM   #4
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Quote:
Originally Posted by zaraz View Post
I know I would need new belts, not sure what size belts to get, thats what I need help with, the old belts will not work, and I would like to keep the 20t center and 37t diff pulleys, do I just add 5 teeth to the belt, or is there a proper way to calculate the lenght of belt I need, thanks
I would think the xray belts for the t3/t4 would work. They use 20t center and 38t on the diff and spool. So the front and tear belts would prob work.
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Old 08-04-2013, 05:05 PM   #5
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http://driftmission.com/guides/belts-guide/ Lists pretty much every known belt and its length in mm work out how many mm extra you need then find an appropriate belt to try.
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