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Old 12-24-2005, 02:35 PM
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CS130 alternator 'size'

I am rewiring my T-Bucket this winter and want to use one of March Performance Products serpentine belt conversion kits as part of that process, involving an alternator swap as well. I would like to use a CS130, mounted low on the driver's side. The March website indicates that their kit requires 10.5" clearance from the center of the crankshaft to the outside edge of the alternator case if using a '6 inch diameter' alternator, and 11.5 inches of clearance if using a '7 inch diameter' alternator. I don't have a CS130 to look at yet, so the question is:

Does anyone know if the CS130 is considered to be 6" in diameter or 7" ? I don't have quite the 11.5" required if using the 7" alternator.

Thanks to all.

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Old 12-24-2005, 06:35 PM
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Doc here,

Go here:

http://www.chevelles.com/techref/tecref14.html

For everything you always wanted to know about CS 130 's....

I read it, couldn't really make heads nor tails on the size..maybe you'll see what your looking for..

Doc

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Old 12-24-2005, 07:11 PM
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Thank you, Doc.

I saw the article you mentioned before I posted and drew the same conclusion. I just ran another search changing the criteria slightly, and found this:

http://www.novaresource.org/alternator.htm


The first paragraph in the article would lead me to believe that the CS130 is the 'smaller' of the two.

In both these articles, the installer mentions using a V-belt pulley on this unit. The only reason I was thinking of using the serpentine conversion was that I believed the single V-belt pulleys I have on the car now would not be enough to turn the CS under a load. Once the belt slips while attempting to turn the CS pulley and glazes the pulley's surface, I don't think you'll ever get it back to the original traction. Sounds like the belt will have to be super tight using a pulley system and perhaps prematurely wearing the bearings on the water pump and the CS as a consequense. I guess I could always consider a dual belt setup as well.
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Old 12-24-2005, 07:29 PM
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Doc here,

Go back and re~read that article again..

I thought (and I may be way wrong on this..) I saw it say , "All CS130's were Serpentine Belt driven..

Is that what you read too?

And the number (like, CS 130/6/7xxx) dealt with the unit number, then the 6 = number of internal grooves on the serpentine pulley snout , 7 = diameter etc..

See what you read..Is it the same as I thought?

Doc

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Old 12-24-2005, 09:30 PM
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All CS130s came with a serpentine pulley from GM. However, you can easily remove that pulley and put a V-Belt pulley on the unit and run it that way, which seems to be what some hot rodders are doing, as per the articles. My concern was whether a single V-belt would handle the unit under a load or does it need more, which is why I was looking at the serpentine conversion kit or perhaps multiple V-belts. The multiple V-belts might be a more economical solution, and now that I'm thinking out loud here, I like the redundancy of the second belt vs the single serpentine unit - might be the ticket if you need to hobble home or to a shop in the event of a belt failure.

Thanks for your replys, and Merry Christmas to all.
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Old 12-25-2005, 08:04 AM
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CS130 alternator

I just measured the CS130 on my '34 Chevy and it's approximately 6 inches OD. It's been on the car for at least 15 years using a single V-belt. The car has air, electric fan and a big stereo, and I haven't had any slippage problems. It's low on the drivers side using an Alan Grove bracket. Painless Wiring has the connector plug for you.
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Old 12-25-2005, 09:17 AM
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GMTech,

That's good information. Thank you and Merry Christmas to you.
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