High Output alternators

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cs alternator

Postby jpb04619 » Fri Jan 26, 2007 10:47 am

ac delco makes a plug in adapter so you can hookup the cs type without cutting or splicing.....there are 2 different adapters,one for use with an guage and one for an idiot light i ran into this when i put a 700r4 in a 77 van..the engine rpms dropped so much the alternator was not keeping the voltage up...the cs corrected that john b
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Postby v8astregt » Sun Jan 28, 2007 6:32 pm

75 Pontiac Astre GT: 406SBC/TH350, roll bar, S10 goodies, down to 11.47 so far, more to come later.
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Postby v8astregt » Mon Jan 29, 2007 2:55 am

I was doing a bit of digging around at Autozone today, and found that the CS130 out of a 90 Buick Century is exactly what I needed. It has both mounting ears on opposite ends of each other (12/6 o'clock) vs. the (2/6 or 10/6 o'clock) positioning of all the other CS130's I have on cars at home here (88 IROC, 88 Silverado).


So the mounting will be no different from my SI style alternator. I'm just going to snip off a harness at the boneyard later this week so I can do the alternator probably Saturday.
75 Pontiac Astre GT: 406SBC/TH350, roll bar, S10 goodies, down to 11.47 so far, more to come later.
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another website find info and parts

Postby MIKESMONZA » Sat May 19, 2007 7:49 pm

Thanks to V8astregt, I found a web site that has some upgrades and how to infomation.,,,( with pictures) and diagrams to visualy look at some and make a informed decision on upgrades and so forth, :arrow: www.madelectrical.com ,,,just like :arrow: Zeke's post it is educational with explanation's as to amps volts and loads added to your h- body and daily drivers,,, :roll: :roll: Mike also there is a section in the website :idea: :idea: :idea: :arrow: shop solutions that has a step by step way for you yo check out your gauges stock and aftermarket for being accurate.,,,, :arrow: tests for the novice and pro overworked parts switcher weekend mechanic.,,,, :arrow: This site is being upgraded so make a check on it annualy , every three months to see whats new .,,Mike redit 5-20-07
Last edited by MIKESMONZA on Thu Feb 14, 2008 2:38 pm, edited 1 time in total.
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Postby acstestinc » Sun Sep 09, 2007 7:18 am

Found this upgrade kit at "Quick Start", www.alternatorparts.com

Part No. SE-7011 SE-7011 105 Amp One-Wire Conversion/Repair kit
105 Amp One-Wire Hook-up Conversion/Repair kit, fits Delco-Remy's 10-SI Internal Regulator Alternator
Your Price Qty
$54.95

Detailed Description
105 Amp One-Wire Hook-up Conversion/Repair kit, fits Delco-Remy's 10-SI Internal Regulator Alternator

Part #SE-7011 Kit Contents:
1- Brush holder assembly
1- Diode trio
1- Self-exciting (one-wire) voltage regulator
1- 105 amp. stator
1- Heavy duty rectifier
1- Step-by-Step Instruction
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High Ouput Alternators

Postby acstestinc » Tue Jan 08, 2008 2:39 pm

I've been looking into this topic again and can't find anything that says that a 12SI won't directly interchange with a 10SI.

12SI's run up to 94 amps (10SI up to 63 amps) and also make a lot more amps at low rpm

The mounting hole spacing and dimensions are identical. I've attached the Delco Remy spec sheets. The pulleys are also said to interchange.

Most of the articles I've found talk about upgrading from the old "DN" style (external regulator) to an "SI" style and indicate that the wiring is the same for both 10SI and 12SI.

I've also read that "hot rodding" a 10SI up to 90 - 100 amps may cause your windings to burn out do to the lack of cooling. This will be dependent upon the demands placed on the alternator. The main changes in the 12SI were the cooling fan and the air inlet openings in the rear (besides the internals).

Anyone running a 12SI as a direct bolt in swap ?
Attachments
10SI - 12SI Specs.PDF
(75.79 KiB) Downloaded 95 times
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Postby acstestinc » Tue Jan 08, 2008 4:14 pm

Well I'll let you know tomorrow. I ordered a 12SI from NAPA and i'll get it in the morning and try.
Last edited by acstestinc on Tue Jul 15, 2008 7:09 am, edited 1 time in total.
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Postby SunbirdMan » Tue Jan 08, 2008 5:55 pm

I think you'll also need a M8 x 1.25 metric bolt about an inch long. I'm doing the same swap but didn't have a metric bolt so had to pick one up. Still haven't insalled it yet. Well, in fact, I did install it but discovered my old bolt wouldn't thread. The pulley I got on mine from a junkyard is slightly larger that the 10si I had on there but the belt still worked. Other than the metric bolt, it was a direct swap. You're probably going to order one by the part number but make sure the rectifier cooling heat sink fins are curved. According to zeek and others, that's how to tell a 94 amp unit.
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Postby spyder_xlch » Tue Jan 08, 2008 6:08 pm

Paul, what part number did you order? Was it a 213-4711?
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Postby acstestinc » Tue Jan 08, 2008 7:43 pm

There are two part numbers depending on where the 2 pin wiring connector is oriented , "clocked" as seen from the back, to the top of the alternator:

- 321-269 (9:00, 94 amps, with fan)
- 321-266 (3:00, 94 amps with fan)

A/C cars, with the alternator in the middle of the engine above the water pump, need the 321-269 P.N.

I have re-clocked alternators before but you need to be careful.
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Postby spyder_xlch » Tue Jan 08, 2008 9:58 pm

What brand alternators are they? Look like a beck arnley number.
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Postby acstestinc » Wed Jan 09, 2008 8:51 am

The P.N.'s are AC Delco.

The one I'm getting is a NAPA re manufactured unit.
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Postby acstestinc » Wed Jan 09, 2008 4:23 pm

12SI alternator is a direct bolt in for stock 10SI style.

See my Modifications list in the Garage.
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Postby mcssed » Mon Jan 14, 2008 6:39 pm

Hi Paul....I bougth the one wire hook up from JEGS, I think it was around $35 works just fine and I have an electric fan, electric fuel pump and a relocated battery. Never had any problem battery not charge. Been sitting at my buddies garage for a few months and started right up. I believe this is the original alternator when it had the V6 in it!
livin in the 80's
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Re: High Output alternators

Postby chuck79 » Sun Aug 29, 2010 9:58 am

A friend gave me a 93 amp alternator from a mid 80's Monte Carlo, I just switched the pulleys from the serpentine to the v-belt. Same plug in as the 37 amp I replaced.
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