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80 versus 100A [message #280791]

Fri, 26 June 2015 14:54

appie

Messages: 902
Registered: April 2013
Location: denmark

Karma: 2

Senior Member

As I wanted to buy a spare alternator I was looking into getting a 100 A
Now I found this site http://vintage.mitchell1.com/PClubData/chassis/del82/V2823012.pdf. http://vintage.mitchell1.com/PClubData/chassis/del82/V2823012.pdf
Saying that at 2000 rpm. The output of both is 55 A. As Olga seldom comes over 2400 rpm. About 115 km. There does not seem to be any reason to change to a 100 A alternator

Appie eleganza 76 "Olga" now sadly sold 6 wheel discbrake Quadrabags Springfield stage 2 462 olds Manny tranny ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html Fulltiming in Europe july 2014 til july 2016 Denmark

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Re: [GMCnet] 80 versus 100A [message #280794 is a reply to message #280791]

Fri, 26 June 2015 15:05

Dave Mumert

Messages: 272
Registered: February 2004
Location: Olds, AB, Canada

Karma: 0

Senior Member

Hi

I think you will find the alternator turns 2 to 2.5 times as fast as the engine.
I don't know the pulley sizes off hand but I think the crank pulley is about 6 inches in diameter and the alternator is 3 or less.

If the ratio is 2.5 you will get full output at 2000 engine RPM.

Dave

> -----Original Message-----
> From: Gmclist [mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of lenze middelberg
> Sent: Friday, June 26, 2015 1:55 PM
> To: gmclist@temp.gmcnet.org
> Subject: [GMCnet] 80 versus 100A
>
> As I wanted to buy a spare alternator I was looking into getting a 100 A Now I found this site
> http://vintage.mitchell1.com/PClubData/chassis/del82/V2823012.pdf.
> http://vintage.mitchell1.com/PClubData/chassis/del82/V2823012.pdf
> Saying that at 2000 rpm. The output of both is 55 A. As Olga seldom comes over 2400 rpm. About 115 km. There does not seem to
be
> any reason to
> change to a 100 A alternator
> --
> Appie
> eleganza 76 "Olga" ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html
> Fulltiming in Europe since july 1 2014
> Denmark
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> GMCnet mailing list
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Re: 80 versus 100A [message #280797 is a reply to message #280791]

Fri, 26 June 2015 15:17

appie

Messages: 902
Registered: April 2013
Location: denmark

Karma: 2

Senior Member

i see. The rpm,s are the altenator rpm and not the engine

Thanks

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Re: 80 versus 100A [message #280823 is a reply to message #280791]

Sat, 27 June 2015 02:00

George Beckman

Messages: 1085
Registered: October 2008
Location: Colfax, CA

Karma: 11

Senior Member

appie wrote on Fri, 26 June 2015 12:54

As I wanted to buy a spare alternator I was looking into getting a 100 A
Now I found this site http://vintage.mitchell1.com/PClubData/chassis/del82/V2823012.pdf. http://vintage.mitchell1.com/PClubData/chassis/del82/V2823012.pdf
Saying that at 2000 rpm. The output of both is 55 A. As Olga seldom comes over 2400 rpm. About 115 km. There does not seem to be any reason to change to a 100 A alternator

Appie,

I moved up. The 100 Amp is the first one that has lasted for a while, but that may be coincidence. It is from O'Reilly. I would not be surprised to find they are all remanufactured in the same factory.

I did replace the Alternator output wire that goes to the isolator. You want to be sure you can carry a full 100 amps. You might rev up sometime.

'74 Eleganza, SE, Howell + EBL
Best Wishes,
George

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