|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
11-30-2020, 08:09 PM | #1 |
Senior Member
Join Date: May 2010
Posts: 2,871
|
30 amp generator vs 55 amp
The 21AS - 1000B generator is rated at 30 Amps, while the 21AS-1000-D is rated a 55 amps, both for 42-48, 8 cylinder pass. according to the green bible. How do you get 25 more amps or about 80% more amps out one generator, What is the electrical difference ?
|
11-30-2020, 10:11 PM | #2 |
Senior Member
Join Date: Nov 2010
Location: NM
Posts: 2,438
|
Re: 30 amp generator vs 55 amp
Can't say for certain on that old of a car, but in 48-52 trucks it's a larger generator.
__________________
'52 F-1, EAB flathead |
Sponsored Links (Register now to hide all advertisements) |
|
11-30-2020, 10:14 PM | #3 |
Senior Member
Join Date: May 2010
Location: So Cal
Posts: 8,751
|
Re: 30 amp generator vs 55 amp
They have different armatures and field windings, one has two brushes and the other has four.
|
11-30-2020, 10:15 PM | #4 | |
Senior Member
Join Date: May 2010
Location: Wisconsin, USA
Posts: 9,006
|
Re: 30 amp generator vs 55 amp
Quote:
I have searched for one of those for decades but have never seen one. The difference? As Ross had stated, it was larger than the stock generator. Not larger in diameter but rather, in length.
__________________
"I can explain it for you. However, I can't understand it for you". |
|
11-30-2020, 11:22 PM | #5 |
Senior Member
Join Date: Jan 2011
Location: sw minnesota
Posts: 4,574
|
Re: 30 amp generator vs 55 amp
i have a couple long ones, military surplus from the big one, ww2. sadly, they will not fit a stock single carb manifold as they hit the carb.
|
11-30-2020, 11:28 PM | #6 |
Senior Member
Join Date: May 2010
Location: Melbourne Australia.
Posts: 2,079
|
Re: 30 amp generator vs 55 amp
Sponsored Links (Register now to hide all advertisements)
|
12-01-2020, 06:31 AM | #7 |
Senior Member
Join Date: May 2010
Posts: 2,871
|
Re: 30 amp generator vs 55 amp
Ford made a 51AS-10505-A regulator rated at 40-45 Amps for the 55 amp generator. Too scarce, and too long though, but great information. Thank you.
|
12-01-2020, 11:21 AM | #8 |
Senior Member
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 10,316
|
Re: 30 amp generator vs 55 amp
Just curious, if they will not fit a single carb manifold, how do they mount them? Perhaps an offset mount over the head, like aftermarket? Maybe the 55 AMP generators being referenced are not for flatheads?
|
12-01-2020, 02:06 PM | #9 |
Senior Member
Join Date: Feb 2020
Location: Hayward,CA
Posts: 513
|
Re: 30 amp generator vs 55 amp
The 1938 truck sales lit. Mentions an optional 12 volt system.
They mentioned something about fleets that use radio communication. |
12-01-2020, 02:48 PM | #10 |
Senior Member
Join Date: May 2010
Location: Wisconsin, USA
Posts: 9,006
|
Re: 30 amp generator vs 55 amp
The "big" genny for '40 fit perfectly as per the photos I have of police vehicles so equipped back then. I can't speak for other years.
__________________
"I can explain it for you. However, I can't understand it for you". |
12-01-2020, 03:01 PM | #11 |
Senior Member
Join Date: Jan 2011
Location: sw minnesota
Posts: 4,574
|
Re: 30 amp generator vs 55 amp
here's a pic i had on file. i assume they had they're own manifold. perhaps T16, or bren carrier. i had two T16's years before i had these gennys, sorry, didnt pay attention to what was on them.
|
12-01-2020, 09:43 PM | #12 |
Senior Member
Join Date: May 2010
Location: South Texas
Posts: 1,631
|
Re: 30 amp generator vs 55 amp
I have seen special intake manifolds that move the carburetor back to clear the long generator.
|
12-01-2020, 09:53 PM | #13 |
Senior Member
Join Date: Jan 2011
Location: sw minnesota
Posts: 4,574
|
Re: 30 amp generator vs 55 amp
another thought that just occurred to me, perhaps my long gennys would fit on the big 337 (?) truck motors as they must be longer
|
12-01-2020, 10:51 PM | #14 |
Senior Member
Join Date: May 2010
Location: South Texas
Posts: 1,631
|
Re: 30 amp generator vs 55 amp
The 337 have the room for a longer generator, but used 8BA style strap hold down. The 337s I have use the typical 8BA sized generator too, but I have seen pictures of a 337 with a long generator.
|
12-02-2020, 12:09 AM | #15 |
Senior Member
Join Date: Jan 2011
Location: sw minnesota
Posts: 4,574
|
Re: 30 amp generator vs 55 amp
thanks for that info, so the real application for the long genny i have is still a mystery !
|
12-02-2020, 10:46 PM | #16 | |
Senior Member
Join Date: May 2010
Location: South Texas
Posts: 1,631
|
Re: 30 amp generator vs 55 amp
Quote:
I remembered seeing an add for an old bus with a generator like yours. I found it again, 1939 Ford bus. Scroll down through the pictures, notice the carburetor is moved closer to the fuel pump to clear the generator: https://barnfinds.com/crackerbox-1939-ford-school-bus/ |
|
12-02-2020, 11:16 PM | #17 |
Senior Member
Join Date: Jan 2011
Location: sw minnesota
Posts: 4,574
|
Re: 30 amp generator vs 55 amp
mr 38 coupe, thanks for that!!! it sure looks like the same one. looks like the back of the genny is darn near to the center water outlets on the head. mystery solved. years ago before i knew they would not fit a standard manifold i sold one at a swap meet. that fellow was very excited, well at the time, perhaps not when he tried to use it! maybe he's a barner, and now needs to find a bus?
|
12-03-2020, 09:17 AM | #18 |
Senior Member
Join Date: Sep 2014
Location: Wiscasset, Maine
Posts: 1,981
|
Re: 30 amp generator vs 55 amp
Anyone know what the greatest output is, i.e. greater than 30amps, for a standard length generator is and the part numbers?
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|