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Author Topic: 1100693 alternator. Need correct date for my car.  (Read 1225 times)
heiferduster
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« on: March 10, 2014, 09:25:12 AM »

Hello again.  I am looking to get the correct alternator, 1100693, 37 amp. alternator for my 67 Camaro but was wondering about how much in advance was the alternator built before the final assembly date?  I have found many answers to this and am thinking it might be just a few weeks before?  How about up to a month before assembly?  My car was built the 3rd week of March, 1967.  With that date, I'm thinking it should read about 7C.  Possibly 7B? or would that be too early?  This is a BB car from LOS, so there is no ac., a 37 amp.
Thanks.
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x77-69z28
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« Reply #1 on: March 10, 2014, 09:47:01 AM »

Either would work. For reference, my 12D 67 RS/SS alternator is dated 7M6.
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Mike S
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« Reply #2 on: March 10, 2014, 10:27:42 AM »

 Parts like the 1100693 were consumed quickly due to being standard on cars unless an alternate amperage was ordered so you should see a much closer built date relative to the build date of the car. My NOR car has the standard 37A unit so the build date was more recent relative to the cowl assembly date but after the engine build date. Below are the dates for my '67's. Notice how the standard 37amp alternator is about a week behind the car assembly date compared to the longer date lapse for the non-standard 42amp LOS car.

NOR - Cowl date - 5B - Alternator date 7E4 (standard 1100693 -37A) - voltge regulator date - 7E
LOS - Cowl date - 4B (UOIT lists 4/13/67 specifically)- Alternator date 7A30 (optional 1100696 - 42A) - Voltage regulator date 7C


Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
heiferduster
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« Reply #3 on: March 10, 2014, 07:40:45 PM »

Sounds great.  I think I will look for the 7C. 37 amp.  I think this was assembled March 31, 67.  I don't think there is any reason to believe it was anything other than a 37 amp originally.  I don't have a build sheet or POP.  Would it make a difference if it was a RS/SS?.
Thanks for the input.
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Mike S
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« Reply #4 on: March 10, 2014, 07:48:36 PM »

I think you may need the larger capacity if you have a lot of options drawing amperage including A/C.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
heiferduster
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« Reply #5 on: March 10, 2014, 08:08:03 PM »

Hey Mike~
There is a BB (396) in there so AC wasn't available in 67, until 68 with the BB.  Other than a AM/FM radio and console, it doesn't have any other options that take power.  Unless, the headlight doors made the difference? 
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Mike S
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« Reply #6 on: March 10, 2014, 08:22:18 PM »

 My NOR BB has the basic 37a unit. Only options outside the SS are an AM radio, gauges, R/S and manual transmission.
 The LOS BB car that has the 42a K79 alternator option only has the AM radio w/rear speaker, R/S and TH400 transmission.
I've seen the K79 before with other originally equipped TH400 cars but not sure why. It wasn't mandatory for that tranny option.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
MyRed67
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« Reply #7 on: March 11, 2014, 01:10:14 AM »

My 1100693 Alternator is dated 6 K 21,  Block is dated 10 26 per the front pad.  This engine is in a 11 A built Camaro.  So Alternator date is only 5 days prior to Engine build date.  I know,,,this seems pretty close, but I'm pretty sure it is the original.
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1967 Camaro  LOS  11A
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Mike C.    NW - Illinois
heiferduster
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« Reply #8 on: March 11, 2014, 04:20:46 AM »

Thanks.   Maybe others can shed more input??  If this is a LOS 396 RS/SS, with auto transmission, and the only other options taking power is the AM FM radio, console gauges etc, would there be a 37 amp in there or the larger 42 amp?  Someone put in a 55 amp 100803 in there now.  Don't know where that came from but that's what they did years back.  Would courtesy lights in this package require an upgraded alternator?  I'm sure that a 37 amp would be plenty for what is there but I just want to get the right one that would have been in there originally.
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Mike S
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« Reply #9 on: March 11, 2014, 07:21:21 AM »

Thanks.   Maybe others can shed more input??  If this is a LOS 396 RS/SS, with auto transmission, and the only other options taking power is the AM FM radio, console gauges etc, would there be a 37 amp in there or the larger 42 amp?  Someone put in a 55 amp 100803 in there now.  Don't know where that came from but that's what they did years back.  Would courtesy lights in this package require an upgraded alternator?  I'm sure that a 37 amp would be plenty for what is there but I just want to get the right one that would have been in there originally.
I did more research last night on the 42amp being used with the TH400 option. I found a similar discussion on a Chevelle site and stated that the 42amp unit came with the TH400 transmission and it was confirmed on some CD a person had that contained option info.
  I believe it had to do with the 42a having a higher minimum charge output at idle with the TH400 compared to the 37 amp that came with a manual transmission (unless options dictated otherwise). Looking at the tuneup specs for the 67 w/396, the TH400 idled 100 RPM's lower (700 M/T vs. 600 A/T) than the manual transmission so that is likely why the 42amp, with the higher idle current output, was used.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
heiferduster
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« Reply #10 on: March 11, 2014, 07:57:08 AM »

Now THAT'S what this forum is all about.  THANK YOU MIKE for pointing that out!  That does make sense to me.   I suppose also that when sitting in traffic or at a stop sign your foot is always on the brake more with the automatic than the manual transmission and using brake lights/amp draw as well as other functions, heater, ignition coil lights, etc.  .   You have changed my mind.  Now I will look for the 42 amp either a 7C or 7B.    I'm sort of glad I didn't go with the 1100693 now.  Thanks again!
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Mike S
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« Reply #11 on: March 11, 2014, 08:39:37 AM »

 Glad I was able to be of some help  Smiley Actually, I'm glad this discussion came up because it triggered a curiosity about why my 67 LOS (I owned going on 34 years now) had the 42amp in the first place. It is original to the car and I never gave it much thought until now. In the past I figured it was because the dual belt pulley, used with the smog option, is installed (was a Ca. car originally) and that was the reason for the 42amp unit. I've learned since then that the pulley installed varied based on engine ordered so the dual belt pulley was not unique to the 42amp alternator. I didn't relate the 42amp with the TH400 usage until this discussion and past observations.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
heiferduster
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« Reply #12 on: March 11, 2014, 08:58:33 AM »

My 67 alternator also has a dual pulley on it but I thought it might be installed to "use" the empty pulley spaces on the crank and water pump, for looks Smiley (mine is a California emissions too) so you are saying that the dual pulley was used along with the alternator and air pump together??  I thought it may have had the single pulley alone and the air pump just went around the crank pulley and the water pump.  I really need to look at the AIM again.  its been a while and its cold here in Mn.

Do you have the 7037210 quadrajet?  I'm still looking for one.  I found a 7027210.
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Mike S
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« Reply #13 on: March 11, 2014, 09:06:31 AM »

 I'll take a picture of my belt setup and post tonight so you can see the dual belt drives. It's not a show car but it is original.
I have the 7037210 carb.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
Mike S
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« Reply #14 on: March 11, 2014, 08:09:03 PM »

 Here are two views of the pulley and belts for the K19 smog option. The very bottom pulley (not pictured) has 3 grooves and made of cast iron.
Notice the 42amp alternator with the 2 groove pulley. Let me know if you need any closer shots.

Mike
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67 LOS SS/RS L35 Hardtop - Original w/UOIT
67 NOR SS/RS L35 Convertible - Restored
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