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Whats the right alternator?
#1176505 Tue Aug 02 2016 02:27 PM
Joined: Dec 2013
Posts: 189
M
Shop Shark
My 49' 3100 AD is just about ready for its first lap of the neighborhood. It was a basket case with no gen or alt. I found 12 volt bulbs everywhere, and it fired right up and ran on a 12 volt battery. The voltage reg was disconnected. So........I'm assuming here that it had an alternator. Is the Delco 7127 one wire 10SI 63 amp the right choice? Any feedback would be great. Thx.


Have you ever noticed that anyone driving slower than you is an idiot and anyone driving faster than you is a maniac? - George Carlin
Re: Whats the right alternator?
Marko2727 #1176535 Tue Aug 02 2016 06:21 PM
Joined: May 2001
Posts: 8,386
Extreme Gabster
If you have enough accessories that you need a 63 amp alternator I'd recommend you get one with the sensing wire still functional. If you don't have a lot of accessories you don't need that many amps and a one wire should be sufficient.

That is my opinion and you'll find many on this subject.


"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.
My TRUCKS website
Re: Whats the right alternator?
Marko2727 #1176550 Tue Aug 02 2016 10:04 PM
Joined: Dec 2013
Posts: 189
M
Shop Shark
Thanks cletis, I wont be running a thumping stereo, flat screen or blur ray. Just a basic 2 speaker radio, upgrading to led lights and need a place to plug in a phone and gps. If there are additional things to do while I'm at this please feel free to jump in here anyone.


Have you ever noticed that anyone driving slower than you is an idiot and anyone driving faster than you is a maniac? - George Carlin
Re: Whats the right alternator?
Marko2727 #1176553 Tue Aug 02 2016 10:08 PM
Joined: Dec 2015
Posts: 2,268
Big Bolt Forum Moderator
from what you stated, a one wire should be fine. That is all I ran on my 59 Suburban, and that had 4 headlights instead of 2, no LED lights, and I had halogen driving lights and a thumping stereo in it (also towed a trailer with lots of lights from time to time), I never had an issue with not enough alternator.


Mike

1955 Chevy 6400 ex-flatbed (no bed now!)
In the Stovebolt Gallery [stovebolt.com]


1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery [stovebolt.com]

1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery [stovebolt.com]

Sufficient unto the day is the evil thereof
Re: Whats the right alternator?
Marko2727 #1176561 Tue Aug 02 2016 10:53 PM
Joined: Dec 2013
Posts: 189
M
Shop Shark
Thx Mike- I might do a small trailer once and awhile, so thanks for reminding me to find a trailer hitch plug.


Have you ever noticed that anyone driving slower than you is an idiot and anyone driving faster than you is a maniac? - George Carlin
Re: Whats the right alternator?
Marko2727 #1176603 Wed Aug 03 2016 03:35 AM
Joined: Dec 2015
Posts: 2,268
Big Bolt Forum Moderator
I just put a 7-way on my 58. I get all my 12v wiring stuff from http://delcity.net/ They have good prices on wiring, ends, trailer plugs, etc.


Mike

1955 Chevy 6400 ex-flatbed (no bed now!)
In the Stovebolt Gallery [stovebolt.com]


1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery [stovebolt.com]

1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery [stovebolt.com]

Sufficient unto the day is the evil thereof
Re: Whats the right alternator?
Marko2727 #1176922 Sat Aug 06 2016 04:11 AM
Joined: Dec 2013
Posts: 189
M
Shop Shark
69cuda, Very cool site with great prices. Thx. Marko

Last edited by Marko2727; Sat Aug 06 2016 04:14 AM.

Have you ever noticed that anyone driving slower than you is an idiot and anyone driving faster than you is a maniac? - George Carlin
Re: Whats the right alternator?
Marko2727 #1177338 Tue Aug 09 2016 01:54 AM
Joined: Jun 2012
Posts: 1,745
S
'Bolter
63 Amps might be too much for the Amp meter? If you plan to run the truck mostly stock, then 35 Amps should be all you need. It will run the lights, even a trailer, and a radio, and still charge the battery. It is the same rating as the Generator so no issue with the Amp meter. Someone here will know if 63 Amps is too much for the meter. You could put a shunt across it, but that tends to mess with the function. Any one here know if the meter will be OK at 63 Amps?


Steve H
Re: Whats the right alternator?
Marko2727 #1177360 Tue Aug 09 2016 04:59 AM
Joined: Sep 2011
Posts: 352
5
Shop Shark
I put a 105 amp, single wire in my '54 and it worked great. Easy to wire and install.

Re: Whats the right alternator?
Marko2727 #1177390 Tue Aug 09 2016 05:03 PM
Joined: May 2001
Posts: 8,386
Extreme Gabster
I can guarantee you a 105 amp is not "the right alternator" for most of our old trucks.


"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.
My TRUCKS website
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