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Old 04-07-2017, 09:21 AM   #1
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Dual alternator on a 8.3

His anyone ever put two alternators on a 8.3 befor if so pls do tell.. I need more power! Lol more power!
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Old 04-07-2017, 10:55 AM   #2
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...or...go with a single high output. You can get alts up to about 300+ amps. Mine is 250. Most are built for EMS and other service type vehicles. Might even be cheaper since they usually use the original mount/bracket.
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Old 04-07-2017, 01:04 PM   #3
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I was hopping to get right around 300 amps but thuy only make a 240 one and it's 500 they also make a 400 amp on but it's like 1400 way to much.. cheap Asian! Lol I was hoping they make a kit for dual atl.. I think I see them on RVs but I don't know.
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Old 04-07-2017, 01:13 PM   #4
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Here's a 370 amp for $699.

6 Phase 370A Elite series alternator for Ford - Mechman Alternators
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Old 04-07-2017, 01:48 PM   #5
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Will that work on a 93 8.3 cummins? I know I'm asking too much now! Lol ;)
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Old 04-07-2017, 02:45 PM   #6
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I got your dual alternator.



https://www.powerbastards.com/dual_a..._multiples.asp

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Old 05-21-2017, 11:01 AM   #7
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Hey NguyenBus,

Did you ever find an answer to this?

I would like to add a 2nd alternator to my Bluebird with an 8.3. I will be running a 24v house battery bank and want an alternator dedicated to charging the house battery bank.

Thanks.

S.
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Old 06-08-2017, 08:35 PM   #8
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Nah. I put a 260 amp alternator in my carpenter 5.9 cummins. I can charge my huge solar bank rolling and run my air conditioner at idle.

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Old 06-08-2017, 08:36 PM   #9
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Will that work on a 93 8.3 cummins? I know I'm asking too much now! Lol ;)
It should. 360? Damn. The one di looked at was oil cooled, so i went with a 260

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Old 06-08-2017, 09:05 PM   #10
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24v

Military runs 24V alternators on the cummins 8.3 for the M939 series 5-tons. Very mechanical everything, 1991.

Might be worth a look?
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Old 06-09-2017, 09:42 AM   #11
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Dead Pirate --- does your 260 have an external rectifier? And how do you have it wired into your system?
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Old 06-09-2017, 11:12 AM   #12
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I got your dual alternator.

Ok, I'll bite; is that for real or a photochop?
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Old 06-09-2017, 12:26 PM   #13
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It's real. I can't imagine why, but it's real.
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Old 06-09-2017, 12:52 PM   #14
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I am still on the hunt for a dual alternator setup for my 8.3.

Anyone had any success finding a solution?
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Old 06-09-2017, 01:07 PM   #15
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The information I keep finding is on Dodge Cummins Diesel Forum

cumminsforum.com

thedieselstop.com

Dual Alternator Kits - National Alternators

https://www.nationsstarteralternator...Kits-s/209.htm

You've probably seen these because they're so easy to find.

I'd start with making a custom bracket and setting up a belt, but I have no idea about the wiring.

Is this a safer method than trying to use the single alternator to charge house batteries?
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Old 06-09-2017, 01:09 PM   #16
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I am still on the hunt for a dual alternator setup for my 8.3.

Anyone had any success finding a solution?
Ok, I'll bite again/still. Why are you not fabbing a bracket made out of two store bought mounts welded together. That's assuming you don't go 100% from scratch and homemade.
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Old 06-09-2017, 01:16 PM   #17
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Is this a safer method than trying to use the single alternator to charge house batteries?
Gives you some redundancy at the very least. Less load per alt maybe?
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Old 06-09-2017, 01:18 PM   #18
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The information I keep finding is on Dodge Cummins Diesel Forum

cumminsforum.com

thedieselstop.com

Dual Alternator Kits - National Alternators

https://www.nationsstarteralternator...Kits-s/209.htm

You've probably seen these because they're so easy to find.

I'd start with making a custom bracket and setting up a belt, but I have no idea about the wiring.

Is this a safer method than trying to use the single alternator to charge house batteries?
Thank you for the suggestions.

I did find those and if I wanted a dual alternator on my 5.9 I would be in good shape. Unfortunately I need it for my 8.3 and these folks don't appear to offer kits for the 8.3.

The single alternator will not charge the house batteries because the single alternator is a 12 Volt alternator and the house batteries are 24 Volt. I need a 24 Volt alternator for the house batteries.

Unfortunately I lack the design & fabrication skills to build my own.

Has anyone actually found a dual alternator setup for the 8.3?
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Old 06-09-2017, 01:44 PM   #19
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Unfortunately I lack the design & fabrication skills to build my own.
Bah humbug!! You need a jigsaw (or cutting wheel, etc.), some 3/8ths inch plate, a sharpie, and a drill. Maybe a big piece of 3/8ths plate so you can do it over when you screw up the measurements/alignment the first 3 times.

You can use bolt holes that are already on the engine and just get longer bolts. Make a plate for the front and rear side of the alternator so the mounting points of the alt itself is sammiched in there.

Bonus points if you go out and buy a plasma cutter. Ever use one? I've used a friend's. I absolutely LOVE that thing. $1500 tho but oneday someday.
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Old 06-09-2017, 02:21 PM   #20
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Bah humbug!! You need a jigsaw (or cutting wheel, etc.), some 3/8ths inch plate, a sharpie, and a drill. Maybe a big piece of 3/8ths plate so you can do it over when you screw up the measurements/alignment the first 3 times.

You can use bolt holes that are already on the engine and just get longer bolts. Make a plate for the front and rear side of the alternator so the mounting points of the alt itself is sammiched in there.

Bonus points if you go out and buy a plasma cutter. Ever use one? I've used a friend's. I absolutely LOVE that thing. $1500 tho but oneday someday.
Nah.... I am much more of a splinter picker than a metal manipulator.

Seriously, this is a piece of the conversion that I would be better off buying an off the shelf solution than trying to build it myself.
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