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02-20-2015, 09:31 PM
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#1 |
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Registered User
Join Date: Feb 2015
Location: Nanticoke, MD
Posts: 35
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Alternator questions
I recently purchase a 71 C10 that was wired as a single wire however that alternator died and the only replacement listed is for a stock remanned unit externally regulated unit. The truck was "unfinished" in the way of no heat, AC, radio, etc. However I'd like to readd these things back into the truck. I have an optima blue top battery I plan on installing also.
Would you all recommend keeping a 1 wire alternator or switching to a 3 wire? If so a 3 wire, how do I wire it in? Which amperage? If so a 1 wire, which amperage? Please include recommendation on the parts (Company, part #) if you can. Specs on the battery: Battery Type: Sprial AGM BCI Group Size: D34M Cold Cranking Amps: 750 amps Cranking Amps: 870 amps Thanks in advance! |
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02-20-2015, 09:33 PM
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#2 |
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Registered User
Join Date: Jan 2009
Location: Calgary, AB
Posts: 1,181
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Re: Alternator questions
1 wire for better flexibility and upgrade options. You could easily upgrade to a CS130 for more amperage if you wanted.
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02-20-2015, 09:43 PM
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#3 | |
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Registered User
Join Date: Feb 2015
Location: Nanticoke, MD
Posts: 35
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Re: Alternator questions
Updated first post with more information
Quote:
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02-21-2015, 12:07 AM
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#4 |
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Senior Member
 
Join Date: Dec 1999
Location: TX
Posts: 1,631
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Re: Alternator questions
Checkout the MadElectrical.com website. Lots of good info there.
Start on the TECH page but the following articles stand out: http://www.madelectrical.com/electri...hreewire.shtml and http://www.madelectrical.com/electri...elcoremy.shtml To answer your question "Do I need more amperage?" - We have no idea how many amps you were getting from the 1 wire alternator. If you set it back up to work with an external regulator and 42 amp alternator your probably going to notice a difference. I know going from a 42am to a 63 amp 10si makes a difference. That would be my recommendation. I would get this:  http://www.amazon.com/dp/B001KR2GVI/ref=wl_it_dp_o... and straighten out the wiring so it would work. There is a wiring diagram for these trucks out there.(http://67-72chevytrucks.com/vboard/showthread.php?t=185665). So..if you can get back to stock...you can easily rewire to work with a 10si.
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02-21-2015, 12:16 AM
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#5 |
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Msgt USAF Ret
 
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,719
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Re: Alternator questions
__________________
VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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02-21-2015, 01:23 AM
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#6 |
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Registered User
Join Date: Feb 2015
Location: Nanticoke, MD
Posts: 35
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Re: Alternator questions
The "single" wire was a SI12.
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02-21-2015, 01:37 AM
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#7 |
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Registered User
Join Date: Jan 2015
Location: Southeast, SD
Posts: 32
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Re: Alternator questions
Just to make it easy to get a 63 amp single wire alternator, Napa new alternator part number is 1N4011SW. No core needed, and its lifetime warranty.
__________________
My friends describe my house as the small town used Chevy Pickup dealership. |
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02-21-2015, 02:32 AM
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#8 |
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Registered User
Join Date: Sep 2013
Location: Gonzales, La
Posts: 1,441
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Re: Alternator questions
LMC truck has a conversion harness for $19 that is plug and play to go from external regulator to internal regulated alternators.
__________________
MyToys: Goldilocks the "Ol School Survivor" 1968 C10, SWB Stepside, 08/15 TOTM, 250 CI 6 cylinder, 3 on the tree, 3.73 rear, 3/5 static drop, 23,500 original miles. Samson the 1970 CST10, LWB, 462Ci, Turbo 350 tranny, 3.08 rear gear, PB, PS, A/C, AM/FM, 2/4 Drop. Brutus the 1998 Camaro Z28, 33,500 original miles, LS1, 519 RWHP/497 RWTQ. Member of the Louisiana Classic Truck Club, LCTC Member of the Louisiana C10 Club Member of the Baton Rouge Drifters Car Club |
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02-21-2015, 02:34 AM
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#9 |
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Registered User
Join Date: Feb 2015
Location: Nanticoke, MD
Posts: 35
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Re: Alternator questions
Truck doesnt have the old regulator in place
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02-21-2015, 02:37 AM
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#10 | |
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Registered User
Join Date: Feb 2015
Location: Nanticoke, MD
Posts: 35
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Re: Alternator questions
Quote:
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02-21-2015, 03:27 PM
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#11 |
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Registered User
Join Date: Apr 2010
Location: So Cal
Posts: 1,472
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Re: Alternator questions
How much do you think you need?
37Amp ex reg alt = AC, HEI, 2 elec fans. trailer brake controller, CD player w/bluetooth.
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'67 GMC 2500, 292, 4spd, AC |
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02-21-2015, 03:35 PM
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#12 |
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Registered User
Join Date: Feb 2015
Location: Nanticoke, MD
Posts: 35
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Re: Alternator questions
Went with a single wire 63amp meant for a 78 camaro
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02-21-2015, 10:27 PM
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#13 |
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Registered User
Join Date: Feb 2015
Location: Nanticoke, MD
Posts: 35
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Re: Alternator questions
14.35 volts at the battery while at idle.
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