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01-14-2013, 01:50 PM | #1 |
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Join Date: May 2011
Location: Cypress, Tx.
Posts: 1,504
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Choosing an alternator?
Hi! I have one blank spot left in my engine compartment (except for a lower radiator hose), and that is the need for an alternator. I'll be running AC/heat, electric fan, electric fuel pump, and lights of course, and windshield wiper(should never see rain). NO power windows or power seats. Would a 65 amp be enough (internal regulator?)? or what would be a good alternator for my truck? Can I have too much amps?
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'72 Ford Bronco project(July 17 2021-?) https://67-72chevytrucks.com/vboard/...d.php?t=828015 59 Apache (sold 6-25-2021) 67 Ford Mustang (re-restored after Harvey) 1968 Jeep Cj5 (2-8-2020 to present) 1992 Jeep Yj (8-17-20 to present) (Jurassic build) www.Classiccarsandtools.com |
01-14-2013, 02:42 PM | #2 |
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Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,705
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Re: Choosing an alternator?
You can pay for more amps than you might need or ever use if you buy one of the high end aftermarket alternators that is aimed at the guys with monster sound systems
If you didn't want shiny I'd suggest one that came off an 85 Buick Electra and a lot of 83/84 GM pickups. http://www.oreillyauto.com/site/c/de...1468&ppt=C0330 108 Amps and plenty easy to get or get parts for. There are comparable chrome or polished alternators floating around or if you were so inclined you could get one at a wrecking yard and buy the shiny cases and swap the innards into the new case with new bearings and brushes and have a shiny rebuilt alternator ready to go. I'm not a real fan of the one wire alternators that no doubt someone will throw out as a must have. The only real advantage to them is that you only have the one wire to hide so as not to clutter up the engine compartment. I saved one off an old 85 Electra I had a few years ago for my 48. It will be buried so far down in the engine compartment with the 292 that no one will see it without hanging over the fender so I probably won't put a shiny case on it.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
01-14-2013, 03:00 PM | #3 |
Senior Member
Join Date: May 2011
Location: Cypress, Tx.
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Re: Choosing an alternator?
I like that alt Mr48! I don't want a chrome alternator, just a nice new one. I have an Oreillys by me that the folks know me all too well! That alt that you have the link to, does it have a the built in regulator? If so then it has the little plug on the side of it too?
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'72 Ford Bronco project(July 17 2021-?) https://67-72chevytrucks.com/vboard/...d.php?t=828015 59 Apache (sold 6-25-2021) 67 Ford Mustang (re-restored after Harvey) 1968 Jeep Cj5 (2-8-2020 to present) 1992 Jeep Yj (8-17-20 to present) (Jurassic build) www.Classiccarsandtools.com |
01-14-2013, 04:33 PM | #4 |
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Join Date: Jun 2006
Location: Idaho
Posts: 8,800
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Re: Choosing an alternator?
I used the 65 A internal regulated one that came off the donor truck that has the same stuff (AC, elec wiper,etc) as I am running. Figure easy upgrade if it is not enough. Before I ran the original 36 A generator!
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1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project |
01-14-2013, 06:47 PM | #5 |
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Join Date: Mar 2012
Location: Lakes Region NH
Posts: 3,200
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Re: Choosing an alternator?
I like to use a 12SI alternator rather than the 10SI found on earlier vehicles. It has a better regulator, more holes in the case for cooling, better charging at low speed and an improved fan. And it's usually not too expensive. There's a 94A version that works well. Applications include some cop cars, later Jeep CJ's, and the 85 Olds Calais.
http://www.rockauto.com/catalog/more...209&cc=1217067 |
01-14-2013, 09:13 PM | #6 |
Senior Member
Join Date: May 2011
Location: Cypress, Tx.
Posts: 1,504
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Re: Choosing an alternator?
Tomorrow I'll go to O'reilly's and see about the alternator mr48chev posted, and whatever else, like the 12si alt 1P wrote about. I'd rather buy from the local auto parts store to warranty reasons. I hate boxing things up to mail back!
Thanks everyone! http://www.jegs.com/i/Powermaster/713/7294/10002/-1
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'72 Ford Bronco project(July 17 2021-?) https://67-72chevytrucks.com/vboard/...d.php?t=828015 59 Apache (sold 6-25-2021) 67 Ford Mustang (re-restored after Harvey) 1968 Jeep Cj5 (2-8-2020 to present) 1992 Jeep Yj (8-17-20 to present) (Jurassic build) www.Classiccarsandtools.com |
01-15-2013, 01:13 AM | #7 |
Registered User
Join Date: Mar 2006
Location: Ontario
Posts: 514
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Re: Choosing an alternator?
Try a 94-96 Impala or Caprice.
They run a 140amp alternator, more than you'll ever need! |
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