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Subject: "GM Alternator conversion" Locked thread - Read only
 
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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Sep-22-00, 09:31 AM (PST)
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"GM Alternator conversion"
 
  

I just completed a GM Alternator conversion on my Spit after the Lucas combination generator and regulator setup bit the dust. I even rebuilt the generator and got it working great, but the regulator had seen better days. Instead of spending $30 on a regulator, I spent that on a GM alternator and associated bits to convert the car to a more reliable and powerful assembly.

This is a very popular conversion and is quite easy to do. I did it in about two hours with breaks to listen to a ball game. I've seen conversions talked about and even instructions on how to do it, but they all lack that critical component- pictures!

I've added this conversion to my PROJECTS page on my Spitfire web site at: http://jarmac.picarefy.com/spitfire

I'd be tempted to post it here too, but I'm not sure we would want to have that many pictures in a bulletin board posting.


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  Subject     Author     Message Date     ID  
GM Alternator conversion Vegaman Dan Sep-22-00 TOP
  RE: GM Alternator conversion Jeff McNealadmin Sep-22-00 1
     RE: GM Alternator conversion Vegaman Dan Sep-22-00 2
  RE: GM Alternator conversion Kestral215 Oct-06-00 3
     RE: GM Alternator conversion Vegaman Dan Oct-09-00 4
         RE: GM Alternator conversion Kestral215 Oct-09-00 5
         RE: GM Alternator conversion Kestral215 Oct-10-00 6
             RE: GM Alternator conversion Vegaman Dan Oct-10-00 7
                 RE: GM Alternator conversion Vegaman Dan Oct-20-00 8
                     RE: GM Alternator conversion Jeff McNealadmin Oct-20-00 9
                     RE: GM Alternator conversion Kestral215 Oct-21-00 10
                         RE: GM Alternator conversion Vegaman Dan Oct-23-00 11
                             RE: GM Alternator conversion Kestral215 Oct-23-00 12
                                 RE: GM Alternator conversion Vegaman Dan Oct-24-00 13
                                     RE: GM Alternator conversion Kestral215 Oct-24-00 14
                 RE: GM Alternator conversion tr3driver Oct-25-00 15
                     RE: GM Alternator conversion khasenzahl Apr-24-01 28
                         RE: GM Alternator conversion tr3driver Aug-26-04 38
  RE: GM Alternator conversion Kestral215 Jan-16-01 16
     RE: GM Alternator conversion Vegaman Dan Jan-16-01 17
  RE: GM Alternator conversion SpitfiresRule Feb-07-01 18
     RE: GM Alternator conversion Vegaman Dan Feb-08-01 19
         RE: GM Alternator conversion jhobson Feb-23-01 20
             RE: GM Alternator conversion Vegaman Dan Feb-23-01 21
                 RE: GM Alternator conversion jhobson Apr-02-01 22
                     RE: GM Alternator conversion snowygrouch Apr-02-01 23
  RE: GM Alternator conversion Jeff McNealadmin Apr-16-01 24
     RE: GM Alternator conversion Vegaman Dan Apr-26-01 29
  RE: GM Alternator conversion dauria Apr-18-01 25
     RE: GM Alternator conversion Kestral215 Apr-18-01 26
         RE: GM Alternator conversion dauria Apr-19-01 27
  RE: GM Alternator conversion Vegaman Dan May-31-01 30
     RE: GM Alternator conversion landrover Jun-02-01 31
         RE: GM Alternator conversion Vegaman Dan Jun-03-01 32
             RE: GM Alternator conversion Kestral215 Jun-03-01 33
                 RE: GM Alternator conversion cattfish Jan-18-02 34
                     RE: GM Alternator conversion junkie679 Jan-18-02 35
  RE: GM Alternator conversion ZachZ Jun-21-02 36
     RE: GM Alternator conversion Vegaman Dan Jun-23-02 37
         RE: GM Alternator conversion xcar27 Jul-16-09 39
             RE: GM Alternator conversion JohnZisslerteam Jul-16-09 40
                 RE: GM Alternator conversion xcar27 Jul-17-09 41
                     RE: GM Alternator conversion ericsbracerteam Jul-17-09 42
                         RE: GM Alternator conversion xcar27 Jul-17-09 43
             RE: GM Alternator conversion Dennis Jul-22-09 44
                 RE: GM Alternator conversion Youngbobteam Jul-22-09 45

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Jeff McNealadmin
Charter Member
7230 posts (Someone who doesn't have as much free time as he used to)
Sep-22-00, 09:37 AM (PST)
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1. "RE: GM Alternator conversion"
In response to message #0
 
LAST EDITED ON Sep-22-00 AT 09:54 AM (Pacific)

Dan,

You're more than welcome to edit your message, link the pictures and post it here! Linking to your photos doesn't eat up any bandwidth on this end! It's your call, but you're more than welcome to do that!

Great article, Dan! I LOL about "we all know, electronics can't work if you let the smoke out". Very funny. And true!

Got a question for you. The GM pulley worked okay? Any more hints or details you can provide on the adjuster bracket fabrication? Wanna sell me one?

Right now, my Lucas/regulator setup are working fine, so I'll let sleeping dogs lie for now, but when the time comes to replace, I'm going to follow in your footsteps. Got a question... Any reason that the regulator box can't be left in place for costmetic purposes, and the wires all soldered together inside? Additionally, I was wondering if this might be a place to cut the juice for a hidden cut-off switch for theft deterrance... Hmmmmmm.

Best wishes,

Jeff
/spitfire/sig.jpg
Administrator
The Totally Triumph Garage
'67 RHD Spitfire Mk3 aka "Mrs. Jones"
'68 LHD Spitfire Mk3 - long term project


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Sep-22-00, 11:34 AM (PST)
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2. "RE: GM Alternator conversion"
In response to message #1
 
  

I don't like to duplicate too many things if possible in different sites. I'm not sure if we posted something like that here how long it would stay as a message post before it had to be purged for space and time's sake. A PROJECTS section might be easier where the subjects can be posted or moved by the moderator and locked.

Anyways, as to your questions:

Pulley: The pulley on the alternator is a standard V-belt pulley and shouldn't pose any problems. The belt doesn't care what it's running on as long as it lines up, which this alternator does if you mount to lower bracket with the spacer removed. The alternator already has a thick base for the lower hole that the spacer is no longer needed. I was quite surprised when it turns out that the pulley lines up with the water pump and lower crank without any modification. I figured I would have to grind the alternator lower mount down or add washers to move the assembly forwards. Neither turned out to be the case.

The overhead bracket was modified from another vehicle, in actuality a 1972 Fairmont Railway Motors Inspection gang car. That's a type of equipment that runs on the rails where inspectors can check the rails after a storm or other needs. Today railroads just use pickups with special wheels. But that's another story. A common aftermarket chrome upper bracket assembly can be used if shortened and a new mounting hole drilled. I will do this myself as soon as I find one. It's a flat piece of barstock bent in a slight curve. I remember selling them for under $10.

As for leaving the regulator box in place, you COULD do that and leave all the connections inside, but I like the look of the firewall without it for a cleaner area. If you choose to keep it, you could put a kill switch inside with a method of activating it outside if you wish. It might even make a nice spot for extra fuses for other circuits and nobody would be the wiser.

Now the real trick would be to somehow adapt the Lucas generator shell to the GM alternator to have a 'modern' Lucas generator!



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Kestral215
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58 posts (Enjoys making "vroom VROOM" noises whilst eating soup)
Oct-06-00, 10:41 PM (PST)
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3. "RE: GM Alternator conversion"
In response to message #0
 
   Geof Bush
'79 Spitfire
"Li'l Brit the Rolling Restoration"
2000 Award of Excellence winner -- Indy British Motor Days

Hi Dan,

Would this alternator install correctly on a '79? I feel my alternator/regulator is about to go "Tango Uniform" and would like something more reliable than Lucas (imagine such an attitude)!


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Vegaman Dan
Charter Member
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Oct-09-00, 11:53 AM (PST)
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4. "RE: GM Alternator conversion"
In response to message #3
 
   A GM Alternator can be installed on anything that rotates with a belt. It's exceedingly universal in design. I've used them in railroad track maintenance equipment without difficulty.

The only problem really comes in is with the wiring harness that you have. I'd have to look at the diagram for the later models. Do you have an external regulator? If everything is internal, then it should be pretty much straight forward swapping. For the upper bracket, you can obtain a chrome bracket meant for Chevy engines, often called a universal alternator bracket. It's about 10" long and has a slight curve at one end. You'll need to cut down the straight end a bit, but it will work well. I just got one recently and will be installing it to replace my original bracket I cobbled together from another piece of equipment. When I do so, I'll include part numbers and photos on modifying the bracket.


Vegaman Dan
68 Spitui!


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Kestral215
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58 posts (Enjoys making "vroom VROOM" noises whilst eating soup)
Oct-09-00, 08:41 PM (PST)
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5. "RE: GM Alternator conversion"
In response to message #4
 
   Geof Bush
'79 Spitfire
"Li'l Brit the Rolling Restoration"
2000 Award of Excellence winner -- Indy British Motor Days

Hi Dan,

The '79 is an internal regulator. Let me know what part number to look for and I will jump onto NAPA or CarParts.com. They might even have the bracket when you include that number. Thanks.

Geof


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Kestral215
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58 posts (Enjoys making "vroom VROOM" noises whilst eating soup)
Oct-10-00, 01:30 PM (PST)
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6. "RE: GM Alternator conversion"
In response to message #4
 
   Hi again Dan,

Disregard the previous comment. I went onto your web site and got the part numbers for the alternator, etc. Though I have an alternator on mine already, it is a Lucas, and... 'Nuff said. I have a very faint glow to my "IGN" light. Hopefully this will cure it. Thanks.

Geof Bush
'79 Spitfire
"Li'l Brit the Rolling Restoration"
2000 Award of Excellence winner -- Indy British Motor Days
My 1979 Spitfire


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Oct-10-00, 03:34 PM (PST)
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7. "RE: GM Alternator conversion"
In response to message #6
 
   That faint glow indicates that the alternator isn't charging anymore. At least at that speed. Even with the GM alternator, I have to rev the engine up once to 2,000 RPM to get the alternator to kick in and then it keeps charging regardless of the idle speed.

Industry part number for GM internally regulated alternators is 7127. There's a suffix that indicates the clock position. When you look at the back of the alternator, hold the case so that the adjustment tab is at the top and the longer pivot mount is at the bottom.

Now just like looking at a clock face, you can determine where you want the wires to exit the case for the terminal. In my example, I have a 7127-3C, which means the plug is on the right side. If I had a choice, I think I would go for a 7127-9C instead just to make getting to the wires easier. A 12C would work too. You *can* 'clock' the alternator to change the position of the wires by unbolting the long bolts that hold the case together and rotating it to the position you want, then bolt it back together. You have to be very careful of that though so you don't damage the internal components. If you're getting a new/rebuilt alternator, just get the clock position you want and be done with it.

Vegaman Dan
68 Spitui!


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Oct-20-00, 10:53 AM (PST)
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8. "RE: GM Alternator conversion"
In response to message #7
 
   Here's the bracket I mentioned earlier. It's a chrome universal unit primarily used on GM V8's. It ran less than $10 at a local auto parts chain.

It's by Spectre as you can see, and the part number is: P/N 4226.

Vegaman Dan
68 Spitui!


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Jeff McNealadmin
Charter Member
7230 posts (Someone who doesn't have as much free time as he used to)
Oct-20-00, 11:08 AM (PST)
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9. "RE: GM Alternator conversion"
In response to message #8
 
Thanks for following through with the info, Dan!!

Outstanding work!

Best wishes,

Jeff
/spitfire/sig.jpg
Administrator
The Totally Triumph Garage
'67 RHD Spitfire Mk3 aka "Mrs. Jones"
'68 LHD Spitfire Mk3 - long term project


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Kestral215
Charter Member
58 posts (Enjoys making "vroom VROOM" noises whilst eating soup)
Oct-21-00, 10:57 AM (PST)
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10. "RE: GM Alternator conversion"
In response to message #8
 
   Thanks for the information Dan. Now all I have to do is figure out what the part number is for the alternator with the internal regulator. Not a problem, I'm wearing 'em down!!

Geof Bush
'79 Spitfire
"Li'l Brit the Rolling Restoration"
2000 Award of Excellence winner -- Indy British Motor Days
My 1979 Spitfire


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Oct-23-00, 01:18 PM (PST)
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11. "RE: GM Alternator conversion"
In response to message #10
 
   The part number for a GM alternator that is internally regulated is: 7127. That's the industry standard part number for it and can be cross referenced easily and quickly by any auto parts house. You can also tell them you need an alternator for any mid 70's GM vehicle. All GM alternators from 1972-1980 are identical except for output in amperage (some air condition models have higher 85 amp units, and police/taxi packages are 110 amp units.) The standard model is 63 amps and ideal for what we need. It's also the cheapest which is nice as well.

You can tell if a GM alternator is internally or externally regulated easily by looking at the smaller terminal connector. If the blades of the connection are in parallel ( | | ), then it is an externally regulated unit. If they are in series ( - - ), then it is internally regulated. Easy, eh?

The part number 7127 is also accompanied by another number which is the clock position. This means if you hold the alternator up by the tension adjustment bolt hole at the top and the pivot mount at the bottom, you can look at the back of the alternator and choose where you want the secondary wires to exit the case. The location will be added to the part number. Example: 7127-12C (or just 7127-C) will have the smaller wires coming out of the top or 12 o'clock. 7127-3C exits on the right side, 6C at the bottom and 9C on the left side. Since our engines have the alternator mounted on the port side of the engine, I would recommend the wires to be mounted at either 9 or 12C for ease of access.

Vegaman Dan
68 Spitui!


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Kestral215
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58 posts (Enjoys making "vroom VROOM" noises whilst eating soup)
Oct-23-00, 07:54 PM (PST)
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12. "RE: GM Alternator conversion"
In response to message #11
 
   Sounds good in theory, but the auto supply shops I have gone to only list the "7127" as an external regulated alternator. Guess it's time to try a different shop. I will not give up! Thanks Dan.

Geof Bush
'79 Spitfire
"Li'l Brit the Rolling Restoration"
2000 Award of Excellence winner -- Indy British Motor Days
My 1979 Spitfire


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Oct-24-00, 11:32 AM (PST)
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13. "RE: GM Alternator conversion"
In response to message #12
 
   I spent five years specializing in GM electrical systems with NAPA Auto Parts. I can guarantee you the part number is 7127. Anyways, tell 'em any mid 70's GM car and you'll be fine. If they want to get picky, try a 1974 Chevy Nova with a 350 V8, no AC. That's about as generic as they come.

Vegaman Dan
68 Spitui!


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Kestral215
Charter Member
58 posts (Enjoys making "vroom VROOM" noises whilst eating soup)
Oct-24-00, 07:50 PM (PST)
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14. "RE: GM Alternator conversion"
In response to message #13
 
   Consider it done! I will try the "Nova" this weekend. Thanks again.

Geof Bush
'79 Spitfire
"Li'l Brit the Rolling Restoration"
2000 Award of Excellence winner -- Indy British Motor Days
My 1979 Spitfire


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tr3driver
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1 posts (MGB Driver)
Oct-25-00, 02:12 PM (PST)
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15. "RE: GM Alternator conversion"
In response to message #7
 
   Vegaman Dan wrote :
> Even with the GM alternator, I have to rev the engine up once
> to 2,000 RPM
> to get the alternator to kick in and then it keeps charging
> regardless of the idle speed.

If you want to solve that problem, add a 5-10 ohm 5 watt resistor across the warning lamp. That's what GM does, although the resistor is frequently built into the wiring harness on newer cars. The lamp/resistor supplies the field current necessary to get the alternator 'started' at idle. The other benefit is that now your alternator will work even if the lamp burns out.

Randall


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khasenzahl
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Apr-24-01, 12:47 PM (PST)
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28. "RE: GM Alternator conversion"
In response to message #15
 
   Randall,

Could you please elaborate more exactly where the resistor goes ? In series before the indicator light ?

The soft blinking light is bugging me.

Thanx,

Kevin


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tr3driver
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1 posts (MGB Driver)
Aug-26-04, 05:56 AM (PST)
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38. "RE: GM Alternator conversion"
In response to message #28
 
   >Randall,
>
>Could you please elaborate more exactly where the resistor
>goes ? In series before the indicator light ?

Just a little after the fact ... don't know why not but I never saw this question until just now. Better late than never ?

The resistor goes in parallel across the IGN lamp, effectively it makes the lamp draw more current. Mine is soldered directly to the back of the lamp, hanging out in space a bit so it won't hurt anything when it gets hot.

Randall


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Kestral215
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58 posts (Enjoys making "vroom VROOM" noises whilst eating soup)
Jan-16-01, 08:46 AM (PST)
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16. "RE: GM Alternator conversion"
In response to message #0
 
   Hi again Dan,

Have you looked into the wiring conversion process for converting the Lucas internally regulated alternator to this GM 7127? I wouldn't think it would be difficult, but it may need some input from someone more "electrically" knowledgeable than this old airplane driver! Thanks.

Geof Bush
'79 Spitfire
"Li'l Brit the Rolling Restoration"
2000 Award of Excellence winner -- Indy British Motor Days
My 1979 Spitfire


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Jan-16-01, 11:38 AM (PST)
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17. "RE: GM Alternator conversion"
In response to message #16
 
   I'm sure it can be done, if only by ignoring the existing wiring harness and wiring up the components you really need to get the GM alternator working. All you really need is a heavy wire to the battery from the alternator, plus a smaller one from terminal #1 on the alternator to your warning light on the dash, or to a ballast resistor (switched by the key) to put an initial load on the alternator and kick it into charging. How much you wish to retain of the original alternator wiring would be up to you.

I haven't looked at a late model Spit to see what the wiring is like. A wiring diagram would tell you though quickly. You really only need the wire to the dash light or load resistor. The small wire from Terminal #2 that gets connected to the back of the alternator should really be switched by the key as well so the field coils in the alternator aren't always energized. They shouldn't be really, but it's technically possible. Hmm... give me a diagram of the charging circuit and I can show you where to make the connections. It's definately possible and easy to do.


Vegaman Dan
68 Spitui!


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SpitfiresRule
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Feb-07-01, 11:38 PM (PST)
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18. "RE: GM Alternator conversion"
In response to message #0
 
   KUDOS TO DAN!
I just finished the GM alternator conversion, and wow, what a difference. And Dans instructions were great! The only hard time I had was after lobing off half of the universal chrome bracket, it took several trips to the parts store to get the right size fan belt. But success at last! Oil filter is now visable too! Now with all that juice I can install the electric fan, stereo etc.


Mitch D. Johnson
1965 MK2 "Thomas T. Triumph"
1965 MK2 "Bobby"
1973 1500 "Tiffany" Oldest son's
1965 MK2 "Trumpy" Youngest son's
1964 MK1 Basket "O" Parts!


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Feb-08-01, 11:36 AM (PST)
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19. "RE: GM Alternator conversion"
In response to message #18
 
   I'm glad it worked out. The output of the alternator makes a huge difference. And by using a standard GM alternator, you can get nice accessories such as a chrome case for it.

I got lucky and was able to use the same belt as I had, but due to pulley size differences between different engine models, this is usually something you have to measure yourself. A trick I used at NAPA was to have someone use a piece of 3/8" rope and run that around the pulleys. Then bring the original belt in and with the rope, we could get the belt width and new length easily.


Vegaman Dan
68 Spitui!


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jhobson
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Feb-23-01, 08:13 AM (PST)
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20. "RE: GM Alternator conversion"
In response to message #19
 
   So does anyone have instructions on how to convert the lucas alternator from a Spit 1500 (mine's a '77) to a GM model. From what I can tell from this discussion it seems to be sufficiently differnent from the Mk3 generator to alternator conversion to warrant a different explanation, any takers?

My alternator is making a whirring noise, and I'm not sure how long it will last, so I will hopefully be looking to do the GM conversion using my limited car and technical knowledge (as well as my limited toolkit!)

Any help, as always, very much appreciated!

cheers

John
http://www.spit1500.co.uk/


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Feb-23-01, 11:03 AM (PST)
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21. "RE: GM Alternator conversion"
In response to message #20
 
   It can and has been done, but I would need to see a wiring diagram for the circuit on the stock unit to determine what would be necessary. It should actually be an easier conversion electrically, but I like to be sure before doing any non-stock modifications.

Of course I don't have my Haynes manual handy that covers later models. Only an Autobook that covers roundtails. Hmph. I should have copies of both with me at work.


Vegaman Dan
68 Spitui!


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jhobson
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Apr-02-01, 05:05 AM (PST)
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22. "RE: GM Alternator conversion"
In response to message #21
 
   What GM(Vauxhall) cars that were sold in the UK could I get a suitable alternator from to transplant into my 1500?

cheers
John
http://www.spit1500.co.uk


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snowygrouch
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541 posts (TTN Power Member - a well respected man)
Apr-02-01, 06:31 AM (PST)
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23. "RE: GM Alternator conversion"
In response to message #22
 
   John,
To the best of my knowledge if you want US GM parts you will have to go to a specilalist US breakers or Parts shop in the UK.
You would be very lucky to come across one in a breakers yard.

REAL STEEL in the UK do GM alternators: tel: 01895 440 505.
Specialist Autoparts: 01935 426 517
Speed & Spares America: 01372 745 747 (they have ones from 46)

Give them a try. At least a brand new one will last you.
Calum


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Jeff McNealadmin
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7230 posts (Someone who doesn't have as much free time as he used to)
Apr-16-01, 09:10 PM (PST)
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24. "RE: GM Alternator conversion"
In response to message #0
 
Dan,

I was in my favorite auto parts store the other day and had it in my head that the alternator you suggested was a "7122". Of course this was incorrect, you said "7127", right? Now the thing is, the 7122 appears to be identical in every other respect (same case, it looks like) except the output at 55 amps instead of 60. Is there any reason I should avoid using the 7122, instead? I know that in many cases "more is better", but when I think of our wiring harnesses, I think of the adage "enough is as good as a feast". What say you? Also, any chromed version of this alternator that could be used instead? Insofar as the engine bay is concerned, I'm becoming addicted to chrome!!

Best wishes,

Jeff
/spitfire/sig3.jpg
Administrator
The Totally Triumph Garage
'67 RHD Spitfire Mk3 aka "Mrs. Jones"
'68 LHD Spitfire Mk3 - long term project


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Apr-26-01, 08:30 PM (PST)
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29. "RE: GM Alternator conversion"
In response to message #24
 
   I would have to check the number series, but I know for sure that the 7127C is the unit you want. Be aware there are identical alternators available, but they may differ only by the way they mount. As I recall (a decade later), the 7122 is a metric thread unit. It'll work as well, but you'll need to use a metric bolt for the adjuster. Otherwise, it's identical. Metric mounts were used in GM cars and trucks starting in 1980. I personally go for the 70's era models instead as they were standard SAE.

Will this alternator conversion work for a newer Lucas alternator? Yes, but the wiring connections may be a bit different. I don't have the schematic for an alternator setup on later models. If I had that, I could tell you where to connect into the circuit for it to work correctly.

Vegaman Dan
68 Spitui!


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dauria
Charter Member
Apr-18-01, 12:54 PM (PST)
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25. "RE: GM Alternator conversion"
In response to message #0
 
   I have been following all your information on the GM convertion and I need to do something with my '79 1500 Spitfire. It has an external voltage regulator now and it has been nothing but grief. Will the convertion you have documented here work for my '79 1500?

Jay D'Auria


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Kestral215
Charter Member
58 posts (Enjoys making "vroom VROOM" noises whilst eating soup)
Apr-18-01, 02:40 PM (PST)
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26. "RE: GM Alternator conversion"
In response to message #25
 
   Jay,

I would think that if your '79 has been converted to an external regulator, it should work well. My '79 still has an internal Lucas unit. Dan Vegaman should know for sure if it will work, but I don't see any reason why it wouldn't.

Geof Bush
'79 Spitfire
"Li'l Brit the Rolling Restoration"
2000 Award of Excellence winner -- Indy British Motor Days
My 1979 Spitfire


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dauria
Charter Member
Apr-19-01, 07:36 AM (PST)
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27. "RE: GM Alternator conversion"
In response to message #26
 
   Thanks Geof,

I'll wait a little longer and see if Vegaman sponds before I try the conversion.

Jay


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
May-31-01, 11:17 PM (PST)
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30. "RE: GM Alternator conversion"
In response to message #0
 
   I've had a number of requests for wiring diagrams for conversions of both early Lucas generators and Lucas alternators from late models. Since the conversion physically is the same and only varies between electrical connections, I've made up a handy reference that covers the conversion of both models.

Vegaman Dan
68 Spitui!


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landrover
Charter Member
Jun-02-01, 11:11 PM (PST)
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31. "RE: GM Alternator conversion"
In response to message #30
 
   Dan..

Nice explanation of the conversion.. Someone mentioned that the Delco is a popular conversion - well, it certainly is with Land Rovers - I converted a 1972 Land Rover to a Delco about 10 years ago and never regretted it. Did the same with my '65 Rover. I know lots of other folks with old Landies that have also done the conversion. Never did know there was a specific model # - everyone I know just went to a junkyard and found a Delco that looked like it might work!

Anyway, your graphic is one of the cleanest explanations I've ever seen for the wiring. Would you mind if I posted it to one of the Land Rover sites?

Cheers
Mike Loiodice
'64 Spitfire 4
'65 Land Rover IIa


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Jun-03-01, 10:59 AM (PST)
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32. "RE: GM Alternator conversion"
In response to message #31
 
   Feel free to use the graphic where you wish to. I figure the Internet community is all about sharing information and helping each other. I know when I started out with LBC's I was gobbling up all the information I could and always liked seeing things like templates for shrouds and trunk panels online. A manual is good for somethings but when it comes to doing something that the manufacturer didn't think of, then it's up to the enthusiasts to keep each other up to date.

Perhaps I should submit this to the Spitfire and GT6 magazine as well?


Vegaman Dan
68 Spitui!


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Kestral215
Charter Member
58 posts (Enjoys making "vroom VROOM" noises whilst eating soup)
Jun-03-01, 02:36 PM (PST)
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33. "RE: GM Alternator conversion"
In response to message #32
 
   Dan,

The conversion works great for a '79 Spitfire! I appreciate your assistance in getting Li'l Brit electrically reliably back on the road.

A submission to "Spitfire and GT6" magazine is definately in order. Thanks again.

Geof Bush
'79 Spitfire
"Li'l Brit the Rolling Restoration"
2000 Award of Excellence winner -- Indy British Motor Days
My 1979 Spitfire


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cattfish
Charter Member
Jan-18-02, 00:21 AM (PST)
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34. "RE: GM Alternator conversion"
In response to message #33
 
   LAST EDITED ON Jan-19-02 AT 06:34 PM (Pacific)
 
UPDATE #2
Stamp STUPID across my forehead and call me @!#!@# I redid all the connections including soddering them all check my coil, ignition system , fuses ect all still no spark! I then decided to start from scratch and cover everything on the alternator, well guess what? The small plug connecting the b/y and small b wire to the alternator was not pushed in all the way, I pushed it in and gave her a try she fired up right off with only a small idle problem (been raining here and I got some water up the carb) now all that is left is to adjust my rockers and I should be good to go.

Chris
Update #1,

I got the bracket cut and drilled, the wires spliced as per diagram here, belt at the proper tension, after hooking up the battery and trying to start my spit it appears I am not getting any spark any ideals out there? (coil is fairly new and was working yesterday when I last started the car.)

Thanks
Chris

Ok my curent alternator went "TU" so I picked up a new gm alternator what I would like to know is how much I need to cut off of the universal bracket and what size belt eveyone has gone with I am running a 78 spit with a 74 1500 motor. I plan on picking up the belt in the next day or so and have the bracket alternator and two wire plug so all I will need to do is cut and drill the bracket mount everything, get the belt and finish up.

Thanks
Chris


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junkie679
Member since Dec-30-01
101 posts (Likes anything and anybody fast and low to the ground)
Jan-18-02, 10:00 AM (PST)
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35. "RE: GM Alternator conversion"
In response to message #34
 
Hi cattfish.
I made the conversion to the GM alt. About ten years ago on my 69 spit, just in case you did as I did and picked up your Alt at a junkyard etc. I would advise you check the output after switching as mine was over charging even with all the accessories on.
It was a guick fix ,simply changing the voltage reg. ( inside The Alt.) and everthing worked fine. good luck

Karl
1969 Spit Red
1979 Spit BRG


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ZachZ
Member since Apr-30-02
268 posts (Keeps a clean machine)
Jun-21-02, 06:16 AM (PST)
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36. "RE: GM Alternator conversion"
In response to message #0
 
THREE CHEERS FOR DAN! I did the swap this week, and, my god, the battery is charging properly! No longer do I have to be afraid of driving at night with the lights on... now driving at night without the lights was fine... perhaps not recommended but fine none the less.

Cheers Dan!
Zach
'70 Mk III 90060
Des Moines, IA

Zach
'70 Spit MK III
Des Moines, Iowa, USA


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Vegaman Dan
Charter Member
5 posts (Mixes own "Waxoyl" with ear wax, Vaseline and lard)
Jun-23-02, 03:18 PM (PST)
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37. "RE: GM Alternator conversion"
In response to message #36
 
   Chee, now I'll get a swelled head or something. It's an easy conversion. I don't feel there is a need to even hesitate converting if you have a problem with the original Lucas unless you want to keep to originality.


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xcar27
Member since Jul-16-09
3 posts (Thinks MOT is a brand of apple juice)
Jul-16-09, 04:33 PM (PST)
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39. "RE: GM Alternator conversion"
In response to message #37
 
   Hey guys, I'm new here and have a 63 Mk1 Spit. I've been rebuilding for a couple years (during the summers, I had some torture called 'high school' the rest of the time), got it started for the first time just a couple days ago. When I started it the ignition light increased in brightness, to the point that the first bulb went pop. I replaced the bulb, and suspect that the generator has gone bad. The car is already negative ground, I figured now's as good a time as any to stick a higher capacity alternator in.

It looks like the website and photos you posted have disappeared in cyberspace. Any place I can find those? They'd be a big help. Thanks.

Mark Fischer
1963 Spitfire Mk1


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JohnZisslerteam
Member since Dec-19-01
1516 posts (An "official" TTN Senior Wrangler)
Jul-16-09, 11:07 PM (PST)
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40. "RE: GM Alternator conversion"
In response to message #39
 
Hi Xcar27, A name would be nice here on TTN, we do like to get to know each other on here. And welcome to the very best informative Triumph site on the internet. Now as for your predicament, well I did this conversion a while back and I came up wih many blogs that gave detailed instructions on how to do the conversion. This one I am sending you is one of many , but very informative and easy to follow.

Happy Spitting... John Zissler
(Webpage now available with Wiring Schematics)
http://fire.prohosting.com/johnziss/spit/index.htm (Email reply on my webpages is wrong. It was onetel.com now it is virgin.net) john.zissler@virgin.net

Attachments
http://www.totallytriumph.net/dcforum/User_files/4a60232f4e369c63.txt

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xcar27
Member since Jul-16-09
3 posts (Thinks MOT is a brand of apple juice)
Jul-17-09, 08:29 AM (PST)
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41. "RE: GM Alternator conversion"
In response to message #40
 
   Thanks John, I've added my name to my signature. And I appreciate the wealth of information on here, I'd love to get the Spit onto the road as soon as possible.

Mark Fischer
1963 Spitfire Mk1


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ericsbracerteam
Member since Dec-15-05
115 posts (Likes anything and anybody fast and low to the ground)
Jul-17-09, 11:49 AM (PST)
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42. "RE: GM Alternator conversion"
In response to message #41
 
Quote
.... I'd love to get the Spit onto the road as soon as possible.

Mark - Don't say that too loud...the darn thing will hear you and boy, then you'll be in deep trouble...

Eric Roberts
1973 Spitfire Mark IV 1500
FM2621U


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xcar27
Member since Jul-16-09
3 posts (Thinks MOT is a brand of apple juice)
Jul-17-09, 04:38 PM (PST)
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43. "RE: GM Alternator conversion"
In response to message #42
 
   Well yesterday my ignition light went out suddenly, and I was worried I had a loose connection in my electrical system. So I went through and checked all the connections and changed bulbs -- still no light. So I checked them again and changed bulbs again. After 4 bulbs I got frustrated, pulled the bulb from the oil warning lamp and stuck that in. Worked first time. Turns out the bag of bulbs I was using was my bag of 'bad instrument bulbs'. Why I kept that around I won't ever know. Sigh.

Does anyone have pictures of this type of conversion? I feel the photos would add just a little extra clarity, granted I notice the first post in this thread was from Sept of 2000, so I'm not too optimistic.

Mark Fischer
1963 Spitfire Mk1


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Dennis
Member since Jul-8-09
62 posts (Loves waking up to the smell of burning oil in the morning)
Jul-22-09, 06:51 AM (PST)
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44. "RE: GM Alternator conversion"
In response to message #39
 
  
Quote
Hey guys, I'm new here and have a 63 Mk1 Spit. I've been rebuilding for a couple years (during the summers, I had some torture called 'high school' the rest of the time), got it started for the first time just a couple days ago. When I started it the ignition light increased in brightness, to the point that the first bulb went pop. I replaced the bulb, and suspect that the generator has gone bad. The car is already negative ground, I figured now's as good a time as any to stick a higher capacity alternator in.

It looks like the website and photos you posted have disappeared in cyberspace. Any place I can find those? They'd be a big help. Thanks.



If you google "wayback" it takes you to the internet archive (or just go to http://www.archive.org/index.php ), you can find all sorts of websites that have disappeared still preserved there.

For the alternator conversion you can go directly to http://web.archive.org/web/20010421011329/jarmac.picarefy.com/spitfire/alternator.html

Although you can see all of the photos, for some reason the text on that page is white - just like the background, so you can't see it. But just click and drag your mouse across the entire page and the text will show up.

Good luck with the project and let us know how it goes...

Dennis

Having just tricked my wife into giving me a green-light, I'm now hunting for a 1500 (or a Mk3 or a Mk2 or a MkIV, whatever I can get my hands on) project car...


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Youngbobteam
Charter Member
353 posts (Keeps a clean machine)
Jul-22-09, 07:01 AM (PST)
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45. "RE: GM Alternator conversion"
In response to message #44
 
That link has the article I used as a guide for my conversion. It was simple and I am pleased with the result.

YB
65 MKII 1500/OD


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