1970 Alternator---1100901 VS 1100900

[Fred Y.]

I found a nice 70 for the Wife & now with Winter setting in I have more time to work on it. Late build 15339. I am now hunting for correct parts, etc---looking around a bit I have read that I should be hunting for a 1100901 but I am also seeing 1100900's that say for 70 Corvettes. I ordered the Tech Manual tonight ,so until it arrives I'm not sure which one to hunt for // correct pulley //Fan blades etc. I'm also seeing that the Voltage Regulator was now built into these as well.

I'm a Mid-Year guy so please set me straight here. Any pics of what to hunt for would be much appreciated.

The car is a base 350/300 PS,PB,AC. Thanks

[Michael W.]

Re: 1970 Alternator---1100901 VS 1100900

The car is a base 350/300 PS,PB,AC. Thanks

Since your car has AC, you want to find a 61 amp unit, part number 1100884.

[Fred Y.]

Re: 1970 Alternator---1100901 VS 1100900

Thanks Mike, I saw something on the web mention that the 884 was used on TI cars ,so it make sense that the extra juice from the 884 is needed for the AC.

[Joe L.]

Re: 1970 Alternator---1100901 VS 1100900

Thanks Mike, I saw something on the web mention that the 884 was used on TI cars ,so it make sense that the extra juice from the 884 is needed for the AC.

Frederick------


This is a VERY difficult-to-find and EXPENSIVE to purchase alternator-------one of the most difficult and expensive of ALL Corvette alternators.

[Fred Y.]

Re: 1970 Alternator---1100901 VS 1100900

Frederick------


This is a VERY difficult-to-find and EXPENSIVE to purchase alternator-------one of the most difficult and expensive of ALL Corvette alternators.

Thanks Joe,
And I thought finding 67 parts was rough---HAAA----Well , back from the fryin pan to the FIRE--LOL.

If anyone knows of one out there, I'd be grateful---Thanks

[Norm C.]

Re: 1970 Alternator---1100901 VS 1100900

Joe.... I may have incorrect info,,,, but wasn't the 1100544 used on AC Vettes from late 70 to around 74 or 75?

[Joe L.]

Re: 1970 Alternator---1100901 VS 1100900

Joe.... I may have incorrect info,,,, but wasn't the 1100544 used on AC Vettes from late 70 to around 74 or 75?

Norm------


Yes, the 1100544 was used from 1970 to early 1975 for A/C applications. However, the configuration of the drive end and slip ring end cases changed over those years (after about mid-1971).

The 1100544 may be somewhat easier to find than other early C3 SI alternator part numbers. However, the alternator in question here, the 1100884, is VERY difficult to find. It was used only for the 1969-70 model years and, as far as I can tell, only on Corvettes. Plus, it has unique and easily identifiable drive end and slip ring end case configurations (but also applicable to other 1969-E71 SI alternators). So, it's not just a factor of part number and dates but of CONFIGURATION. Of course, about 99.5% of the folks that might gaze at a Corvette at a show would not know those differences.

[Norm C.]

Re: 1970 Alternator---1100901 VS 1100900

Thanks Joe,, for the quick response and additional info. Interesting how the alternator evolved in those years from the "generator" days. So which is "correct" for AC equipped? At least for the 70-72 TJG, the 1100544 was for all engine groups? Or put the other way,, what application was used for the 1100900 901?

[Joe L.]

Re: 1970 Alternator---1100901 VS 1100900

Thanks Joe,, for the quick response and additional info. Interesting how the alternator evolved in those years from the "generator" days. So which is "correct" for AC equipped? At least for the 70-72 TJG, the 1100544 was for all engine groups? Or put the other way,, what application was used for the 1100900 901?

Norm------


The 1100900 and 1100901 were 42 amp alternators. The 1100900 was "clocked" for big block installations and the 1100901 was "clocked" for small block applications. I've always been surprised that the 61 amp 1100544 was used for both small block and big block, with and without power steering, applications since I would expect the clocking requirements to be different. Apparently, they were not, though.

[Fred Y.]

Re: 1970 Alternator---1100901 VS 1100900

Norm------


The 1100900 and 1100901 were 42 amp alternators. The 1100900 was "clocked" for big block installations and the 1100901 was "clocked" for small block applications. I've always been surprised that the 61 amp 1100544 was used for both small block and big block, with and without power steering, applications since I would expect the clocking requirements to be different. Apparently, they were not, though.

Thanks very much to ALL OF YOU !---So I know I need the 1100884 & NOW the hunt begins.

[Fred Y.]

Re: 1970 Alternator---1100901 VS 1100900

Norm,

Your inbox regarding PM's is full. Please Weed it out a bit. Soooo, potentially if I can find a 1100544 built in say April--early July 1970 would that work gentlemen ??

[Norm C.]

Re: 1970 Alternator---1100901 VS 1100900

Sorry Fred..... have clean out my mail box!!

[D S.]

Re: 1970 Alternator---1100901 VS 1100900

Thanks Joe,
And I thought finding 67 parts was rough---HAAA----Well , back from the fryin pan to the FIRE--LOL.

If anyone knows of one out there, I'd be grateful---Thanks

http://www.yenko.net/ubbthreads/ubbthreads.php/topics/507300/For_Sale_Original_1100884_Alte

[D S.]

Re: 1970 Alternator---1100901 VS 1100900

Norm,

Your inbox regarding PM's is full. Please Weed it out a bit. Soooo, potentially if I can find a 1100544 built in say April--early July 1970 would that work gentlemen ??

I just cleaned out enough to get some more messages.

Thanks,
Scott Sims

[Fred Y.]

Re: 1970 Alternator---1100901 VS 1100900

I located a 884. Thanks to all.