alternator
Thread Starter
6th Gear
Joined: Aug 2009
Posts: 6
Likes: 0
alternator
Have a mostly original 69.Big block 427/435 with 3-2's.Might need a new alternator.Looked on line and saw some from Corvette Central,corvette America and Advanced Auto.From that, I believe I need 100amp(No power steering or air in car.)Any thoughts as to brand etc.?
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,112
From: Crossville TN
Just rebuild it yourself; it's very easy to do. If you don't have a bearing problem at the front end, you don't even have to remove the nut/pulley. Just disassemble from the back side, swap out diode packs, replace the brushes with new ones, and put a little grease/lube in the rear bushing. You can buy rebuild parts at some auto parts places, from a starter/alternator rebuild shop, or over the internet.
P.S. Those two little holes in the rear housing are for paper clips: installed to keep the new brushes in their guides until the housing is assembled back together. Then remove the paper clips.
P.S. Those two little holes in the rear housing are for paper clips: installed to keep the new brushes in their guides until the housing is assembled back together. Then remove the paper clips.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every Model vs Closest Competitor
Joe Kucinski
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
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
The TI ignition did not use a 61 AMP alternator when a 435/427 was ordered.....with which TI was standard in both the L-71 and L-88 and optional in every thing else........no need for a 61 amp alternator in a 435 as none were AC equipped......how do I know, .....I ordered one and still have it....#13092......
Burning Brakes
Joined: Dec 2010
Posts: 848
Likes: 60
From: CA
The TI ignition did not use a 61 AMP alternator when a 435/427 was ordered.....with which TI was standard in both the L-71 and L-88 and optional in every thing else........
Ed
Last edited by restoman1; Oct 11, 2011 at 04:21 PM.
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
.............just picked up from Merolis Chevy, March 1968
Burning Brakes
Joined: Dec 2010
Posts: 848
Likes: 60
From: CA
Well then, I'm confused at your reply. Why did you write the "TI ignition did not use a 61 AMP alternator when a 435/427 was ordered", when TI was a mandatory requirement for the L71 engine and ALL TI cars came with the 61 amp alternator??
Ed
Ed
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
I think we're not the ones that are confused.
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
that clear it up.......
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Umm no. 
61 amp alternator p/n 1100825 came on any 69 Corvettes that had A/C or TI, other than base engine which used 1100884 or L88/L89 which used 1100882. All three are 61 amp.
1100696 42 amp was used in '68 if K66 TI was specified.
61 amp alternator p/n 1100825 came on any 69 Corvettes that had A/C or TI, other than base engine which used 1100884 or L88/L89 which used 1100882. All three are 61 amp.
1100696 42 amp was used in '68 if K66 TI was specified.
Burning Brakes
Joined: Dec 2010
Posts: 848
Likes: 60
From: CA
EDIT: Mike beat me to it, but here's my reply anyway...
RPO K66 required 6.25 amps to operate, compared to the standard points ignition which only required 2 amps. The higher amperage requirements necessitated a higher alternator output and the 61 amp alternator was used. I've attached a copy of the 69 AIM showing the 1100825 "generator assembly" (#2) that came with K66. The 1100825 alternator is rated at 61 amps.
And by the way, the "standard" alternator for the 1969 Corvette was rated at 42 amps. 37 amps alternators weren't used.
But I think Mike hit it on the head and you might be thinking 1968 (37 amp alternator standard, 42 amp with K66 and 61 amp with C60).
Ed
RPO K66 required 6.25 amps to operate, compared to the standard points ignition which only required 2 amps. The higher amperage requirements necessitated a higher alternator output and the 61 amp alternator was used. I've attached a copy of the 69 AIM showing the 1100825 "generator assembly" (#2) that came with K66. The 1100825 alternator is rated at 61 amps.
And by the way, the "standard" alternator for the 1969 Corvette was rated at 42 amps. 37 amps alternators weren't used.
But I think Mike hit it on the head and you might be thinking 1968 (37 amp alternator standard, 42 amp with K66 and 61 amp with C60).
Ed
Last edited by restoman1; Oct 11, 2011 at 06:01 PM. Reason: Mike beat me to it!!
Race Director
Joined: Nov 2002
Posts: 12,142
Likes: 54
From: Taylor Michigan
OK gentlemen, I guess you got me....and apoligize for my incorrect statements.......but I have a 1968 and my OE alternator was on the parts counter and one day it got leggs.....and no way could I look at its amps...I thought it was a 37 A or 42 A ..... and I see the poster did refer his as a 1969....and thus makes a question as to what was on a 68?.....I dont think it was a 61 A.......but am I wrong again......
If I would have went and read the above posts completely I would have the answer
I quit, ...put a zipper on my mouth.....
If I would have went and read the above posts completely I would have the answer
I quit, ...put a zipper on my mouth.....
Last edited by Ironcross; Oct 11, 2011 at 06:51 PM.
Burning Brakes
Joined: Dec 2010
Posts: 848
Likes: 60
From: CA
Don't sweat it. Chevrolet has never been known for the simplistic approach, and things can be VERY confusing at times!
I had a professor in college that had a saying, and it fits me perfectly...
"I am never wrong. Once I thought I was but I was mistaken!"
Ed
I had a professor in college that had a saying, and it fits me perfectly...
"I am never wrong. Once I thought I was but I was mistaken!"
Ed