69 - 1100884 alternator pulley

[Steven G.]

I have an early 1/5/70 , L-46, a/c, std. trans. that uses a 1100884 alternator (61 amp.), dated 9L25 = dec. 25, 1969. Santa has not delivered a ncrs store aim yet. I am guessing that the alt. requires a deep grooved, forged pulley rather than the regular steel stamped type. Would anyone have knowledge about this ? Oh, I wanted to mention that this 69 alternator seems to be as rare as hens teeth. Any help is always appreciated! THANKS, #9.

[Joe L.]

Re: 69 - 1100884 alternator pulley

I have an early 1/5/70 , L-46, a/c, std. trans. that uses a 1100884 alternator (61 amp.), dated 9L25 = dec. 25, 1969. Santa has not delivered a ncrs store aim yet. I am guessing that the alt. requires a deep grooved, forged pulley rather than the regular steel stamped type. Would anyone have knowledge about this ? Oh, I wanted to mention that this 69 alternator seems to be as rare as hens teeth. Any help is always appreciated! THANKS, #9.

Steven-----


The pulley used for the 1969 L-46 with C-60 application was a GM #1949356. This is a stamped steel pulley of 2.625" OD which is zinc plated. They are usually stamped with a "6". Pictures will be found below.

No forged steel pulley was EVER used on any Corvette alternator or generator. However, some applications used a machined steel pulley.

ALL 1969 Corvette alternators are very difficult to find. They are the most difficult to find of any Corvette generator or alternator. Not only are the part numbers unique to 1969 Corvettes and no other GM applications, but the configuration of BOTH the drive end case and the split ring end case are unique and are used on VERY FEW other applications.

[Joe R.]

Re: 69 - 1100884 alternator pulley

Joe & Steven,

I have two alternator pulley's with a 6 on them or maybe not. One has a key-way and the other doesn't. Maybe the one with a key-way is a "9".

Anyway, Steve you are welcome to have the one with the 6 and no key-way like Joe posted in his pics.

I can deliver it to the Kissimmee Meet in three weeks. It's plated and ready to go.

JR

[Kenneth H.]

Re: 69 - 1100884 alternator pulley

Steve,

I've seen three 1100884s on Ebay in the last month. None of them was in very good shape and all would need restoring, and they all had later dates (April, 1970, on). They averaged appx $500 each. FYI, the 1100884 was also used on all 1970 LT-1"s, as well as all 1970"s with C60.

They are pretty rare however, and I just picked one up for my LT-1 at Carlisle in August. Don't ask me what I paid. It was far more than those selling on Ebay. However, the date on it is 9L14 (December 14, 1969) which is correct for my early February 1970 build date, and believe it or not my wife convinced me to take the plunge.

Ken

[Joe L.]

Re: 69 - 1100884 alternator pulley

Steve,

I've seen three 1100884s on Ebay in the last month. None of them was in very good shape and all would need restoring, and they all had later dates (April, 1970, on). They averaged appx $500 each. FYI, the 1100884 was also used on all 1970 LT-1"s, as well as all 1970"s with C60.

They are pretty rare however, and I just picked one up for my LT-1 at Carlisle in August. Don't ask me what I paid. It was far more than those selling on Ebay. However, the date on it is 9L14 (December 14, 1969) which is correct for my early February 1970 build date, and believe it or not my wife convinced me to take the plunge.

Ken

Ken-----


A very early 1100884 (like the one you purchased) MAY have had the same drive end and split ring case end configuration as used for 1969 model year alternators. However, I don't think that later 1970 model year alternators would have had the exact same configuration for split ring and/or drive end cases. Do you have photos of the drive end and split ring end case halves for the alternator you purchased?

[Terry M.]

Re: 69 - 1100884 alternator pulley

The early 884s also have some unique internal items as well. I expect all the early SI alternators had many of these uniquely configured internal components. It probably is best we can't/don't judge these items.

[Kenneth H.]

Re: 69 - 1100884 alternator pulley

Joe,

I'll drag the old Nikon out and post some pictures later this evening. Right now "I'm getting ready for some football". And my Iggles play later today.

By the way, I haven't yet installed it, and I'd welcome some opinons and info to make sure I got it right with the alternator.

Ken

[Kenneth H.]

Re: 69 - 1100884 alternator pulley

Joe, below are 3 pics of the alternator. I'm not sure if they are what you were asking for, but if not let me know and I'll take more.

Thanks,

Ken

[Joe L.]

Re: 69 - 1100884 alternator pulley

Joe, below are 3 pics of the alternator. I'm not sure if they are what you were asking for, but if not let me know and I'll take more.

Thanks,

Ken

Ken-----


Those are exactly the views I was seeking. The alternator has the correct early 1970 drive end case AND it has the correct 1970 split ring end case. So, I would say it's 100% correct for an early 1970 application.

The fan is another matter. It looks like a GM #800594 to me. While it's possible that fan was used for your application, I don't think they were painted black.

[Kenneth H.]

Re: 69 - 1100884 alternator pulley

Joe,

Which is the correct fan for the alternator, and what is the color of the fan? I'll need to start searching for it if I want the alternator to be correct.

Thanks,

Ken

[Joe L.]

Re: 69 - 1100884 alternator pulley

Joe,

Which is the correct fan for the alternator, and what is the color of the fan? I'll need to start searching for it if I want the alternator to be correct.

Thanks,

Ken

Ken-----

I think the most likely fan would have been a GM #1966990, especially for an early 1970. I posted a photo of an NOS example of one of these in another recent thread titled "71 BB Alternator Fan Finish" (or, something close to that). However, it's also possible that the GM #800594 was used. That's what I think you have. However, IF the 800594 was used, I believe it was either stamped from pre-punch galvanized material or it was zinc plated.