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Old 04-19-2010, 08:17 AM
How fast is fast enough?
 
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pullies!

anyone know where I can order an alternator pulley? The one that is currently in my car is a hair too big- drains the battery. I don't need a fancy billet one or anything like that just a small alt. pulley.

And on a side note- what is the smallest diameter I can get away with on a V-belt system?

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Old 04-19-2010, 08:45 AM
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Smallest diameter depends on crankshaft pulley diameter. You don't want to spin the alternator more than 18,000 rpm, so you need to know what diameter the crank pulley is. Usually 6" on an sbc, which means a 2" pulley at the smallest if your engine redlines at 6000 rpm. Any parts store can get them, the just need to look in the back of the catalog for the parts listings.
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Old 04-19-2010, 08:52 AM
How fast is fast enough?
 
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I found a 2.3" one, which may have to do, I'd like to get it to 2.1 or 2.0 but any improvement will help.
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Old 04-19-2010, 06:56 PM
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I tried to find an "overdrive" pulley about 10 years ago.
To be honest, I found the one I'm using in the junkyard.
ssmonty
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