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delco alternator |
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billd
Moderator Group Forum Administrator Joined: Jun/27/2007 Location: Iowa Status: Offline Points: 30894 |
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Posted: Apr/05/2012 at 1:50pm |
Gee, Dennis - that info looks familiar!
Some info I shared a while back -> The 10si was the first internal regulator alternator - from GM for sure, but I believe from anyone.
It was used from the early 70s to the mid 80s and can be found all
over. Physically larger than the Motorola units.
Then the 12si came out in the mid 80s to end up replacing the 10si.
A few design changes and improvements. They included larger stator and
rotor, heavier/larger diodes, this way GM could get more output from
them.
Then the CS series replaced that for the late 80s and into the 90s. The CS alternators are what GM came out with to replace their aging
SI line. They put out a bit more amperage with a lighter weight.
The number after the CS is the diameter of the unit across the
stator - that's the core that has the ring of windings in it, so that's
very nearly the outside diameter of the alternator.
So a CS121 is about 121 mm across the outside of the stator. The CS130 is 130 mm across the stator.
The design was also a bit different in that they didn't use a diode trio for the first time with this CS series.
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KermitDRambler
AMC Addicted Joined: Jul/06/2007 Location: Cincinnati, OH Status: Offline Points: 2579 |
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The 10si was used from the early 70's (72 or 73 I think) through the 80's. Take your pick of any GM car or truck from that time period and you'll be all set.
Matt Edited by KermitDRambler - Apr/05/2012 at 10:39am |
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69amxman
AMC Apprentice Joined: Feb/26/2012 Location: sioux falls,sd Status: Offline Points: 172 |
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has anybody use the bulltear alt bracket , would that work for a 12si?
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69amxman
AMC Apprentice Joined: Feb/26/2012 Location: sioux falls,sd Status: Offline Points: 172 |
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the problem is going to a parts store they always want to know what year the alt came from , so asking for a 10si is useless , they have no idea what that means
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KermitDRambler
AMC Addicted Joined: Jul/06/2007 Location: Cincinnati, OH Status: Offline Points: 2579 |
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Powermaster makes a 10si that bolts into the stock Motorola brackets. Also, it's pretty easy to modify a 10si to fit in place of a Motorola alternator. All you need to do is cut down the pivot boss on the case.
Matt
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69amxman
AMC Apprentice Joined: Feb/26/2012 Location: sioux falls,sd Status: Offline Points: 172 |
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thank-you for the input, the list was refrence from someone who requested it, saying something like everybody talks about these gm alternators 10si,12si, and the cs130, but nobody says what cars they came from. sounds like you have it under control, and i will look into it, might be a matter of finding a bracket, but again thank-you appreciate it
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THE MENACE
AMC Addicted Joined: Nov/04/2008 Location: So. California Status: Offline Points: 4438 |
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I never saw this list you are refering to, but I'm converting my 70 AMX to a Delco Alt. too.
Rather than using the CS series Alt.(which has weird mounting IMO) I'm going to keep things simple by using a Delco 12SI Alt. which is what was used on an 87 Grand Wagoneer 360. That way (rather then spending time fabricating brackets, or butchering the Alt. housing to fit the early car mounting bracket) I am using the Alt. bracket from an 87 Grand Wagoneer 360 and have a simple bolt on Alt. upgrade. The GW also uses a V-belt like you are looking for. The NAPA part number for the 94 Amp. Delco 12SI Alt. is #NAE 66042. You can also get 100 Amp and higher versions of that same Alt. from Summit Racing.
Dennis Edited by THE MENACE - Apr/04/2012 at 5:36pm |
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Former Owner of:
The Craig Breedlove "AERO AMX" Still Owner: SS/AMX #9 replica (THE BIG MENACE) 70 AMX 416, EFI, Nash 5 speed 70 Javelin 401, 727 (Wife's car) 72 Gremlin Autocross Project. |
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69amxman
AMC Apprentice Joined: Feb/26/2012 Location: sioux falls,sd Status: Offline Points: 172 |
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yeah we went thru that the motorola alt is smaller , my only other option is going to junk yard and getting a pully off a newer alt , its just the car list had good info
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whizkidder
Supporter of TheAMCForum Joined: Mar/03/2008 Location: North Georgia Status: Offline Points: 2972 |
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Check the shaft sizes -- you may be able to swap the pulleys with in impact gun.
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Ron Frost
marne1ancient @ gmail.com 910 nine two two 0563 "There is no limit to what a man can do, so long as he does not care a straw who gets credit for it. Charles Montague |
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69amxman
AMC Apprentice Joined: Feb/26/2012 Location: sioux falls,sd Status: Offline Points: 172 |
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there was a list of gm cars that showed what years the cars were and what alternators they used and amperage , i remember seeing it around 2 weeks ago. the problem is whenever we looked up a high amp alt they all had a serpintine pulley, is there any with the v belt?
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