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Old 02-12-2010, 04:08 PM   #1 (permalink)
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Default alternators

I'm upgrading the alternator. I was planning on doing the CS130 GM alternator upgrade. It's 3 wires and it puts out 105 amps.

On of the venders who sells brackets for the kits said that his kit's fit the 10SI and 12SI one wire alternators as well as the CS130 3 wire, but he advises against using the CS130.

I wrote to ask why but he didn't respond. Those that have done the upgrades or looked into it extensively, what are your thoughts?
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Old 02-12-2010, 10:27 PM   #2 (permalink)
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Default azlternators....

I don't know if the CS130 is dimensionally the same as a 10/12SI...

That said, I have a 12SI in my Samurai. I purchased a mounting bracket from Roadless Gear. Unfortunately, the bracket was poorly welded. I received a replacement but it had the same defect.

They are really good guys and gals with quality product and service at Roadless Gear - I'm afraid that their alternator brackets are not the best product around.

Otherwise, things are working good with this alternator. I'm installing a winch in a few weeks and I'll let you know how it goes...
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Old 02-13-2010, 10:48 AM   #3 (permalink)
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I'm just wondering what one has the most output at a _low_ rpm. I find I use the most juice at very low rpms. Most are rated at high way speeds...
I'm looking at using the 12si on my sidekick motor but will make my own bracket and maybe run a smaller pulley.
(I thought about going with duel 12si's with duel deep cycle bats... but the wiring would give me a headache.)

#8000 Ramsey
Snoway plow
power inverter (not yet in)
plenty of lights
one deep cycle bat.
all on a 88 sammy

thanks,
george
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Old 02-13-2010, 11:58 AM   #4 (permalink)
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There are kits on E-Bay for a bolt in swap of the GM CS130. It puts out good voltage at low RPM's and the small ones are at least 105 amps. The kit uses the small housing alt. There are even kits on there that include the alt and all nessary parts for a true bolt on.
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Old 02-13-2010, 12:00 PM   #5 (permalink)
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The CS130 has a smaller case, and it's supposed to put out higher at low idle than the SI alternators. That's why I'm wondering why this guy recommends against using it. If it fits his bracket then I can't see any alterior motivation for him not recommending it. I know there are a lot of guys in the zook comunity that are very opposed to new ideas and they just don't like change. I'd like to buy the alt that works at the lower rpm and connects to my stock wiring but I wan't to be sure this guy doesn't have a valid reason for his disparagement of the Cs130 first.

Another thing I'm considering is eventually building an on board welder. So if there's an issue with overheating or something of that nature with heavier loads I don't wan't to get one that's going to melt
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Old 02-19-2010, 04:23 PM   #6 (permalink)
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doing research on the cs130 I came up with a bunch of nice upgrades for higher output. One place offers a new rear case with cooling fins for the rectifier and larger bearings with a 140 amp stator for 100 bucks. You could completely rebuild a 10 dollar junkyard alternator for the same price of an OEM 105 amp remanufactured unit from autozone.

On the downside, I found out that the CS alternators all use "Avalanch" diodes. They're great for most applications, but useless for a welder. If I'm going to build a welder I will need to use a non-avalanch rectifier on the CS alternator, or use an alternator that uses standard diodes.
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