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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

high amp alt

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Old Feb 8, 2012 | 06:56 PM
  #31  
ArdWrknTrk's Avatar
ArdWrknTrk
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Originally Posted by SCRebel
I have a 89 belt system. So will I need the wiring harness also with the alternator? I have a 89 F150 with a 351w. I would like the 3g 130 amp alt.

Not trying to tread hijack.
FOJ already has....

You will need a charging cable, a fuse & holder, and to jumper the harness as shown in the link in post #12.
The regulator plug is the same, 2G & 3G.

You can get an eyelet to eyelet #2 cable at any autoparts store for $10.
My 460 has the alternator on the bottom, so I don't know what length you need for a serpentine Windsor.

Or you can buy the harness and charge cable kit through the link, or many other places on the internet.
RJM Injection Tech — Alternator Charge Cable Kit
RJM Injection Tech — 3G Alternator Harness


(EDIT) I just want to make sure everyone knows I do not represent RJM.
I have used their products and they work well for me in my application
I am linking images from that site because I know where they are and they show in detail what's needed.
---No affiliation, just a satisfied customer, Bla, Bla bla,---
 
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Old Feb 8, 2012 | 06:57 PM
  #32  
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Will running dual 3g's an multiple batt's with an isolator be a problem ?
 
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Old Feb 8, 2012 | 07:02 PM
  #33  
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SCRebel
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From: Conway, South Carolina
Originally Posted by ArdWrknTrk
FOJ already has....

You will need a charging cable, a fuse & holder, and to jumper the harness as shown in the link in post #12.
The regulator plug is the same, 2G & 3G.

You can get an eyelet to eyelet #2 cable at any autoparts store for $10.
My 460 has the alternator on the bottom, so I don't know what length you need for a serpentine Windsor.

Or you can buy the harness and charge cable kit through the link, or many other places on the internet.
RJM Injection Tech — Alternator Charge Cable Kit
RJM Injection Tech — 3G Alternator Harness
Thank you sir. I believe you have answered my question. This will be on of my upgrades in the near future.
 
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Old Feb 8, 2012 | 07:06 PM
  #34  
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deljac
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so i have a 96 f150 with the windsor will a 3g bolt up to mine without any changes other than wiring
 
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Old Feb 8, 2012 | 07:09 PM
  #35  
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Yes, PnP. Get the right alt for ur mounting brackets
 
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Old Feb 8, 2012 | 07:10 PM
  #36  
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ArdWrknTrk
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Originally Posted by 88dually
Was the original question of, can it be done, get answered, i may have missed it
Direct fit... No, not quite.

As I showed, the bracket needs to be opened up a little for the larger alternator, and some basic wiring needs to be done.
Removing the fire prone 2G charging plug and replacing it with a fused heavy cable.
 
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Old Feb 8, 2012 | 07:13 PM
  #37  
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ok thanks for all the help guys
 
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Old Feb 8, 2012 | 07:15 PM
  #38  
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Will there be a problem running 2 3G's with 3 batt's on an isolator ? 2 batt's will be mounted on pass frame.
 
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Old Feb 8, 2012 | 07:16 PM
  #39  
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Originally Posted by 88dually
Yes, PnP. Get the right alt for ur mounting brackets
Originally Posted by 88dually
Will running dual 3g's an multiple batt's with an isolator be a problem ?
The 95A 3G will fit the Windsor serpentine bracket without clearancing, but you still need a heavier cable.
The 65A 2G was already overloading the dual 10g harness found in the truck.

You could use one as a welder or to run a winch.
You would need some SERIOUS cable to run both of them together.

And really, why bother?
How much load do you possibly have?
 
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Old Feb 8, 2012 | 07:24 PM
  #40  
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How heavy a cable(s) for 2 130a. 1#lt an batt for truck. 1 alt an 2 batt's for compressor, inverter, 1000w work spot lights, possible winch an a few other accessories. Will there be a problem running cables near starter or anything else, or other cables on frame ?
 
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Old Feb 8, 2012 | 07:45 PM
  #41  
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Originally Posted by 88dually
How heavy a cable(s) for 2 130a. 1#lt an batt for truck. 1 alt an 2 batt's for compressor, inverter, 1000w work spot lights, possible winch an a few other accessories. Will there be a problem running cables near starter or anything else, or other cables on frame ?
2/0 cable is rated for 283 chassis amps, so it should carry two 130A alternators.
American Wire Gauge table and AWG Electrical Current Load Limits with skin depth frequencies

I am NOT an electrical engineer, my father is...
I don't think you will see any inductive interference with a steady DC current, but again I don't feel I am qualified to make this a factual statement.

Remember you will need enough belt friction to drive these things, and in my experience that is the limiting factor.
 
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Old Feb 8, 2012 | 08:01 PM
  #42  
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Each alt is goin to seperate batt's. Then isolator ? Also figuring a way to mount another pulley wheel to the right of alt's next to water pump pulley so belt should contact roughly 180 * of each alt pulley. That should work ?
 
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Old Feb 8, 2012 | 08:08 PM
  #43  
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A horsepower is 746 watts.
The 130A puts out roughly 1800 watts, X2 = 3600 / 746 = about 4.8 Hp.
That's a LOT more for a belt to drive.
Especially if it has to drive other things like a water pump, power steering pump, air conditioning compressor, etc...

Remember ALL this has to be driven by the ONE crank pulley.
There's just not enough surface for the friction.
 
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Old Feb 8, 2012 | 08:15 PM
  #44  
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Put extra wheels closer to alt pulleys to get near 270* ?
 
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Old Feb 8, 2012 | 11:02 PM
  #45  
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Thats another reason why I wanted more power, is to be able to run power tools if I need too. I doubt I would have any lights on when Im doing it but maybe just the implement lights for cargo/work lights. as long as I can wire up a converter to run tools or something Ill be happy, then off road run my lights
 
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