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Modified Cadillac  |  Home  |  Discussion  |  Topic: Alternator conversion: CS130 or 12SI 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: Alternator conversion: CS130 or 12SI  (Read 4691 times)
pdxmose
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« on: January 21, 2011, 02:31:47 PM »

I'm going to convert my '66 to an internally regulated alternator.  I'd also like to move to a higher output, so the 12si and cs130 are both cheap options that are around 100A.

Does anyone have any experience or opinions on these two?  There appears to be advantages/disadvantages for both:

CS130 has better output, especially at idle/low RPM.
12SI is more robust, better cooling.
CS130 looks more original with metal external fan.
12SI is easier to connect?
12SI can be clocked to any position, CS130 maybe not?

          ...mose
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1966 Deville 4DHT --- 1971 Buick Riviera --- 1972 M44A2 (duece-and-a-half) --- 1953 Olds 98 --- 1937 Packard 115
Misfit
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« Reply #1 on: January 21, 2011, 05:44:38 PM »

12SI can be built to 160 amps too. Just drill the vents in the case a little larger. That's what we did to mine. I puts out fine at idle with A/C, lights, brake lights, and the juke box blasting.

Fins
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206coupe
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« Reply #2 on: February 07, 2011, 11:37:38 PM »

check out mad electrical and alternatorparts.com lots of cooling stuff
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206coupe
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« Reply #3 on: February 07, 2011, 11:38:13 PM »

i mean cool stuff
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pdxmose
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« Reply #4 on: February 08, 2011, 10:20:42 AM »

check out mad electrical and alternatorparts.com lots of cool stuff
Yep.  Good info on three-wire setups at mad electical.

I decided to go with the CS130.  I like the 'stock' look with the external fan and ribbed winding section.  It's a perfect fit and the original pulley swaps right over and has the same offset.  Wiring is also clocked at 11:00 by default. 105 amps and good output at idle.  Best part is that Rockauto is closing them out for just $31 + $12 shipping.  (Strange - I just checked the price again and it's gone up to $34. I've seen this happen other times AFTER I order something.)

Application:
1988 BUICK SKYHAWK 2.0L 122cid L4 TBI (K) SOHC BECK/ARNLEY Part # 1866102  Remanufactured; May Not Include Pulley  FI; REMAN; w/AC; AMP 105; 12 Volt; CLK 11:00

You'll also need a special plug.  They can be $30 at NAPA, etc., but I found one on Ebay for $12 shipped.  Since I'll be increasing the amperage from ~40 to ~100, I'm planning on rewiring the alternator and main power feeds to improve distribution.  I'll likely go with #6 wire from the battery and add a distribution block on the inner fender or firewall.  Then wire up for remote voltage sense at the junction.  I've never liked how the main power feed comes from the starter.  I've had issues with bad connections in the past.

          ...mose


* mini_engine1.jpg (616.1 KB, 1024x819 - viewed 406 times.)
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1966 Deville 4DHT --- 1971 Buick Riviera --- 1972 M44A2 (duece-and-a-half) --- 1953 Olds 98 --- 1937 Packard 115
tedsled66
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« Reply #5 on: February 08, 2011, 11:08:36 AM »

Looking good. I am drooling while staring at my computer... Tongue Tongue Tongue Tongue

Thanks for the motor porn.
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Stampie
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« Reply #6 on: February 08, 2011, 08:18:22 PM »

Just something about that Cadillac blue that well ... moves me.

Stampie
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Geoff
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« Reply #7 on: February 08, 2011, 10:33:34 PM »

Very pretty, 'Mose!
Geoff
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73eldo
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« Reply #8 on: February 21, 2011, 10:20:16 PM »

Its amazing that the shaft / pulley has not changed.    Was yours a Gen or just an early alternator?
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pdxmose
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« Reply #9 on: February 22, 2011, 10:47:24 AM »

It was an alternator, externally regulated.

The pulley that came on the CS130 was a serpentine, but the orignal pulley swapped right over with perfect alignment.  Just removed the spacer under the serpentine pulley.

              ...mose
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1966 Deville 4DHT --- 1971 Buick Riviera --- 1972 M44A2 (duece-and-a-half) --- 1953 Olds 98 --- 1937 Packard 115
73eldo
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« Reply #10 on: February 23, 2011, 11:21:30 PM »

Did the original look more or less like a 10si?  And then the external regulator looked like the genni ones?
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Ronald
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« Reply #11 on: February 24, 2011, 01:36:05 AM »

I would love to see some panorama pictures of the engine - great job!!!!!!!!!!!!!!!!!!

Don't forget the fuse-able link to the alternator.

Ron
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pdxmose
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« Reply #12 on: February 24, 2011, 11:20:30 AM »

Did the original look more or less like a 10si?  And then the external regulator looked like the genni ones?

Yes and Yes.

Don't forget the fuse-able link to the alternator.

Yep.  I think I'm going to rewire the power distribution, partially in support of the higher amperage.  Either a large distribution point on the fender that includes the large battery/starter cables, or a point on the firewall for the ALT and main feeds (with remote sensing).  Either way, fusible links or breakers.

            ...mose


* alt.jpg (320.74 KB, 785x669 - viewed 219 times.)

* reg.jpg (78.28 KB, 371x292 - viewed 200 times.)
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1966 Deville 4DHT --- 1971 Buick Riviera --- 1972 M44A2 (duece-and-a-half) --- 1953 Olds 98 --- 1937 Packard 115
Robert_Maples
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« Reply #13 on: March 12, 2011, 01:49:02 PM »

Please let me know what your set up is. Id like to get a bigger altenator for all the electroincs I'd like to put in my '67
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bcroe
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« Reply #14 on: March 12, 2011, 09:15:56 PM »

Putting in an internally regulated alt can get rid of some wires and that clumsy external reg, along with some radio interference.  A much larger alt though could cause a lot of belt slipping.  I had to use a different belt arrangement, with a bigger alt.  Bruce Roe
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