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#1
12-10-2012, 07:08 PM
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1970 Alternator 1100902 questions
I am starting to restore my 1100902 for my 1970 TA.
I have come across a difference on the back side cases. There seems to be three different designs for the area of the voltage regulator. Can anyone tell me what is the correct design for a 1100902 dated 0F11? I attached pics of each case style (case # 1, #2 or #3) Also I find differences on the fans as well. I seem to have two different style fans. Again I attached a pic showing fan#1 and fan#2. Any advice or info would be greatly appreciated!!!
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...Steve T. ------------------------------------- Pontiacs: 1966 GTO 4 speed Hardtop Alabama car (Marina Turquoise w turquoise interior) 1970 TA 4 speed Canadian car (Lucerne Blue w bright blue interior) Non Pontiacs: 1966 Lincoln Continental 1967 Ford Thunderbird 1979 Lincoln Continental (Towncar Option) |
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#2
12-10-2012, 07:53 PM
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I have pictures of the 902 I sold with my 70 T/A as well as one on the shelf in the garage. Both have the rear case #3.
The alternator I still have does not have a fan, but the fan on the one I sold is the same as fan #1. Quote:
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#3
12-10-2012, 08:44 PM
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Case #3 is correct. Fan #1 looks correct except for the scallop cut into the edge of the widest blade.
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#4
12-10-2012, 09:19 PM
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fan
Is this the other fan? I have some if you need one, but they need plated. I probably have all the different fans if you need one. I am sure I have at least 6 different style original delco fans.
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#5
12-10-2012, 10:43 PM
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Well so far it seems that I need to locate a case#3. The pic I posted was from a internet pic I found. Anyone know a good source to locate alternator cases or parts?
As for the fan if someone else can confirm the pic of the fan Stellar posted, I will get one of those. Thanks everyone for the info so far.....
__________________
...Steve T. ------------------------------------- Pontiacs: 1966 GTO 4 speed Hardtop Alabama car (Marina Turquoise w turquoise interior) 1970 TA 4 speed Canadian car (Lucerne Blue w bright blue interior) Non Pontiacs: 1966 Lincoln Continental 1967 Ford Thunderbird 1979 Lincoln Continental (Towncar Option) |
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#6
12-10-2012, 11:03 PM
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I am not saying it is the correct fan, I am just showing another option. I think it is the one Functional shaker was refering to.
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#7
12-11-2012, 07:05 PM
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Stellar, I went back to my parts pile this afternoon and I did find the same fan that was in the pic you posted. It did not have that notch out as in the pic I posted. I think I am okay on the fan now. Thanks.
To sum up in my mind: 1100902 37amp 1970 open faced alternator (yes), rear case style#3 (yes/no?) 1100903 55amp 1970 open faced alternator (yes), rear case style#3 (yes/no?) 1100927 37amp 1971 open faced alternator (yes/no?), rear case style#3 (yes/no?) 1100928 55amp 1971 open faced alternator (yes/no?), rear case style#3 (yes/no?) 
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...Steve T. ------------------------------------- Pontiacs: 1966 GTO 4 speed Hardtop Alabama car (Marina Turquoise w turquoise interior) 1970 TA 4 speed Canadian car (Lucerne Blue w bright blue interior) Non Pontiacs: 1966 Lincoln Continental 1967 Ford Thunderbird 1979 Lincoln Continental (Towncar Option) |
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#8
12-11-2012, 08:19 PM
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Case #3 is 1970 only (902 & 903). Case #1 was used in 1971 for the 927 & 928 alternators and later years as well (not sure how long). I think case #2 was used on later ones, after they stopped using case #1.
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1968 Firebird 400HO convertible 1971 Trans Am 4-speed, white/blue |
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#9
12-11-2012, 09:25 PM
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1100903, unopened. 5 spoke front frame.
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#10
12-11-2012, 10:00 PM
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68bird400ho, and held for ransom, thanks for the info. Now I know what rear case I need to locate!
This forum is AWESOME!!! 
__________________
...Steve T. ------------------------------------- Pontiacs: 1966 GTO 4 speed Hardtop Alabama car (Marina Turquoise w turquoise interior) 1970 TA 4 speed Canadian car (Lucerne Blue w bright blue interior) Non Pontiacs: 1966 Lincoln Continental 1967 Ford Thunderbird 1979 Lincoln Continental (Towncar Option) |
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#11
12-11-2012, 10:22 PM
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http://www.forums.maxperformanceinc....d.php?t=539306
I should mention this thread too (Bill's (70RAlll) post near the end). And, my pulley is stamped with a "5". |
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#12
12-11-2012, 10:37 PM
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Case #3 started in 69 on 400 Firebirds and Corvettes.
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#13
12-12-2012, 05:16 PM
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At least now I know kinda where to begin my search....
__________________
...Steve T. ------------------------------------- Pontiacs: 1966 GTO 4 speed Hardtop Alabama car (Marina Turquoise w turquoise interior) 1970 TA 4 speed Canadian car (Lucerne Blue w bright blue interior) Non Pontiacs: 1966 Lincoln Continental 1967 Ford Thunderbird 1979 Lincoln Continental (Towncar Option) |
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#14
12-12-2012, 05:57 PM
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door #4
Caution # 3 is not a 69 There are 2 similar ends compare this to #3. This is a 69 end. 1st pic is a 69 vet 1100859 2n and 3rd are of a 69 853 Look close there is a difference. Look where the threaded hole is on the back. 69 is flush with the case and later ones are raised and in a different location.
Last edited by stellar; 12-12-2012 at 05:59 PM. Reason: spelling |
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#15
12-12-2012, 06:28 PM
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Good eye for detail Stellar!
I see what you are referring to. The threaded hole on the 69's are flush and at the 5:30 o'clock position, if you call the two wire electrical plug in 12 o'clock. The 70's are at about 3:00 o'clock. Why do I think this is going to become a needle in the haystack project????
__________________
...Steve T. ------------------------------------- Pontiacs: 1966 GTO 4 speed Hardtop Alabama car (Marina Turquoise w turquoise interior) 1970 TA 4 speed Canadian car (Lucerne Blue w bright blue interior) Non Pontiacs: 1966 Lincoln Continental 1967 Ford Thunderbird 1979 Lincoln Continental (Towncar Option) |
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#16
12-13-2012, 08:10 PM
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Anyone have a 69 style back (flush mount) they'd be willing to trade for a 70 style?
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#17
12-13-2012, 11:37 PM
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Or sell, so I can sell Steve the one he needs.
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#18
12-28-2014, 03:19 PM
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Reviving an old thread...question about the 1971 open face 927 and 928 alternators. Of the ones I have seen, they have had the fan pictured in post #4. I have seen one February 71 dated 927 with fan #2 in post #1 on it that looks like an untouched original. This fan seems to be the one that I see on 1972 and later alternators. I am wondering if this fan might have been a running change on later dated 71 open face alternators. Has anyone looked at this or does anyone have later dated originals they could look at. I am just wondering what is correct.
Also, I have seen both 2-1/2 and 2-3/4 inch diameter pulleys on these alternators. The mpc says 2-3/4 but wondering if this is not necessarily 100% absolute.
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1968 Firebird 400HO convertible 1971 Trans Am 4-speed, white/blue |
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#19
01-07-2015, 11:22 PM
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902
I have 2.. the one is april, and other june. Both orig unrebuilt units. Notice on back, where plug is, spacing between 1 & 2 different
Unfortunately pics won't upload? |
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