1100884 alternator application
Thread Starter
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
1100884 alternator application
I have a 1100884 alternator on my '69 (C60 and K66) dated 9J4 (September 4, 1969). I've read that this alternator was continued on to 1970 w/ same options. As far as the date code goes, how early of an alternator could a 1970 corvette have? Is September too early? When was the first 1970 model assembled?
Administrator
Joined: Jul 2000
Posts: 53,920
Likes: 6,178
From: About 1100 miles from where I call home.
Pete, the earliest 1970 productions were January 1970, I believe. This is consistent with the '69s running into December '69.
That said, I do not see why a September 884 alternator couldnt find its way onto an early 1970 with air or LT1... its only 3 months to January. I think NCRS would be comfortable with one through Feb or March.
That said, I do not see why a September 884 alternator couldnt find its way onto an early 1970 with air or LT1... its only 3 months to January. I think NCRS would be comfortable with one through Feb or March.
Last edited by vettebuyer6369; Jun 28, 2012 at 07:10 PM.
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
884 alternators were used for the 1970 model year, all cars with AC or with LT1. NCRS judging rules accepts units dated up to 6 months before the car was built.
Thread Starter
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
Thank you Steve and Mike. Is it safe to assume 6 months for any component?
I didn't realize that LT1s were the only model that had TI.
I didn't realize that LT1s were the only model that had TI.
Administrator
Joined: Jul 2000
Posts: 53,920
Likes: 6,178
From: About 1100 miles from where I call home.
Generally yes, although Mike could chime in here, I think some parts can get even a little more leeway like glass? For example, I believe rear window dates on a convertible top can be a year.
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Pretty well all glass can be up to a year, that's about the only component that 'the rules' allow beyond 6 months. Note that the vast majority of components were much closer to 2-4 weeks and 6 months is the very rare exception
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette
Pouria Savadkouei
Thread Starter
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
I am surprised by the 6th months. My alternator date is 9 days before my car build date. Less than 800 produced per week, I'm sure finding correctly dated units within 2-4 weeks, especially on hard-to-find pieces, can be near impossible.
Thread Starter
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
Can you have a date that is too close to your build date? In other words, would a corvette's build date of 06SEP69 be too close to use this alternator?
Safety Car
Joined: Dec 1999
Posts: 3,577
Likes: 822
From: PA
Three high amp alternators were used in 1969 for C-60 and/or K-66 applications... 1100825 was used very early in production, 1100882 was used for a short time after that, and generally, the remainder of the model year used 1100884. The earliest date on a real 1100884 alternator that I have seen is February of 1969 on a March 1969 car.
I wouldn't expect anything other than a 1100884 on a late 1969 Corvette. As Mike noted, typical spread on dates is usually in the two to four week range before final assembly, but the time can be longer.
Regards,
Stan Falenski
I wouldn't expect anything other than a 1100884 on a late 1969 Corvette. As Mike noted, typical spread on dates is usually in the two to four week range before final assembly, but the time can be longer.
Regards,
Stan Falenski
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Thread Starter
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
Mike - this is for a person interested in the alternator, I'm assuming he got it from the trim tag. Would a build date be listed differently on the tank sticker than the trim tag?
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
I asked because the car was not complete on the day the trim tag was stamped and attached. The body was not yet married to the frame at that point either. Cars were usually completed a day or two AFTER the trim tag date which would make the close timing of the alternator date a little more possible.
NCRS judging accommodates 'typical of factory production'. An alternator dated that close to the car completion date is not typical.
NCRS judging accommodates 'typical of factory production'. An alternator dated that close to the car completion date is not typical.
Thread Starter
Melting Slicks
Joined: May 2006
Posts: 3,438
Likes: 41
From: Raleigh NC
St. Jude Donor '13-'14
