Dual Alternators - FSB Forums
Register Home Forums Active Topics Photo Gallery All Albums Mark Forums Read Auto EscrowInsurance FSB Store
FullsizeBronco.com is the premier Ford Bronco Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
Old 11-20-2012, 02:49 PM   #1
TegGs
Registered User
 
Join Date: Jun 2010
Location: Kelowna BC Canada
Posts: 158
iTrader: (0)
Bronco Info: 1995 F150 4x4 Flareside
Dual Alternators

Has anyone ran twin alternators? Just looking for pics of brackets. I'm running a secondary deep cycle for the winch and lights and I would like it to have its own power source.
TegGs is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-20-2012, 03:49 PM   #2
4DI2D
FSM Lifetime
 
4DI2D's Avatar
 
Join Date: Feb 2012
Location: Keizer, Oregon
Posts: 235
iTrader: (0)
Bronco Info: '93 Custom, '90 Lincoln TC 302, E4OD, 31s, posi front diff,QFL
Your best bet for winch power might be twin golf cart batteries (6 volt in series) and a battery isolator. IDK but an alternator could best be mounted in place of an AC compressor.
6Ga welding wire comes to mind.
4DI2D is offline   Reply With Quote
Old 11-20-2012, 05:43 PM   #3
JBfab
Registered User
 
JBfab's Avatar
 
Join Date: Oct 2010
Location: Slatington, PA
Posts: 2,278
iTrader: (9)
Bronco Info: 94 C150 prerunner 351/zf/maf. To many mods to list.
Someone on here had a second mounted up for trail welding. They put it inplace of the smog pump and i belive it was a gm style one wire. Id hit up fireguy (ryan) for a high amp 3g. I think he has them up to 120 amps.
__________________
It's not custom if you bought it from a catalog!
Visit my build thread- http://www.fullsizebronco.com/forum/...d.php?t=211825
JBfab is offline   Reply With Quote
Old 11-21-2012, 02:26 AM   #4
Steve83
Registered User
 
Steve83's Avatar
 
Join Date: Jul 2003
Location: Memphis, TN
Posts: 34,864
iTrader: (100)
Bronco Info: '83 VIN & title on '93 frame/body w/'95 4.9L & EB paint
Quote:
Originally Posted by TegGs View Post
...I would like it to have its own power source.
That's not how it works. Just like the batteries, the alternators should be in parallel. Attempting to isolate them only creates a HIGH risk of fire & electrical damage to every system & component on the truck. Your best move is to simply upgrade to a junkyard 130A factory alternator. If you find it's not enough, THEN go looking for a higher-output single aftermarket replacement.

Ford never offered dual alts on a Bronco, but this album shows a factory GM arrangement, including the wiring diagram:



This shows how Ford wired dual batteries:



This is how mine are wired:



This is where the 2nd battery is installed:

__________________
Walk softly & carry a BIG SIX ! ! !

. .
Steve83 is offline   Reply With Quote
Old 11-21-2012, 02:30 AM   #5
351w500
Ok, Ill admit it's Vagish
 
351w500's Avatar
 
Join Date: Dec 2007
Location: Fairfield ca.
Posts: 9,880
iTrader: (4)
Bronco Info: '90 xlt 351w E40D Truetrac I GOT ROLLER ROCKERS !
Fireguy goes up to 160 amps.
351w500 is online now   Reply With Quote
Old 11-21-2012, 07:38 AM   #6
Saltlife
Beach bumming it ........
 
Saltlife's Avatar
 
Join Date: May 2011
Location: Chesapeake, VA
Posts: 13,503
iTrader: (3)
Bronco Info: 87 F-150 351W, 650 edelbrock 4bbl, C6 W/shift-kit, SAS, 9" lift, 35 12.50 MT Baja MTZs
Quote:
Originally Posted by 351w500 View Post
Fireguy goes up to 160 amps.
I have Fireguys 3g 160 amp and it seems to run everything just fine. I have winched, HIDs, and small system in the bronco.
Saltlife is offline   Reply With Quote
Old 11-21-2012, 09:56 AM   #7
351w500
Ok, Ill admit it's Vagish
 
351w500's Avatar
 
Join Date: Dec 2007
Location: Fairfield ca.
Posts: 9,880
iTrader: (4)
Bronco Info: '90 xlt 351w E40D Truetrac I GOT ROLLER ROCKERS !
i got me one too, giggity.
351w500 is online now   Reply With Quote
Old 11-21-2012, 10:45 AM   #8
BigBlue&Goldie
Registered User
 
Join Date: Oct 2009
Location: Gilbert, AZ
Posts: 170
iTrader: (1)
Bronco Info: 1993 XLT, 5.8L, E40D, Stock......for now!
Definitely stick with one alternator; we only run one on our race car and keep a spare mounted under the hood for backup. Like the others have said, a single high output unit will fill your needs with less drag on the motor and less potential for problems.
BigBlue&Goldie is offline   Reply With Quote
Old 11-21-2012, 11:04 PM   #9
mkinsman
Registered User
 
Join Date: Aug 2010
Location: Massachusetts
Posts: 84
iTrader: (1)
Bronco Info: 1996 Bronco, Eddie Bauer Maroon/Tan, 5.8 6in lift with 35 " kumho mt's (craigslist special)
wouldnt it just make sense to go to a higher amp one then run 2 lower ones? that just seems to make sense
mkinsman is offline   Reply With Quote
Old 11-22-2012, 01:24 AM   #10
TegGs
Registered User
 
Join Date: Jun 2010
Location: Kelowna BC Canada
Posts: 158
iTrader: (0)
Bronco Info: 1995 F150 4x4 Flareside
Thanks, I got thinking about it and for the cost of doing it I'll just do a 3g swap. A guy locally has 3 alternators in his jimmy and 4 Gell batteries. Friggin cool setup. I'm working on a way to mount a secondary battery and isolator setup instead.
TegGs is offline   Reply With Quote
Old 11-22-2012, 09:25 AM   #11
BigBlue&Goldie
Registered User
 
Join Date: Oct 2009
Location: Gilbert, AZ
Posts: 170
iTrader: (1)
Bronco Info: 1993 XLT, 5.8L, E40D, Stock......for now!
3 alternators........does he weld while he winches with his high beams on?
BigBlue&Goldie is offline   Reply With Quote
Old 11-22-2012, 10:56 AM   #12
Madcat455
Registered User
 
Madcat455's Avatar
 
Join Date: Nov 2010
Location: Cape Coral, FL
Posts: 177
iTrader: (2)
Bronco Info: 89 XLT daily driver
Quote:
Originally Posted by BigBlue&Goldie View Post
3 alternators........does he weld while he winches with his high beams on?
Stereo systems.... When I used to compete in IASCA, it wasn't out of place to see 2 or 3 alternators to run all those high power amplifiers(Along with 10-20 batteries.. lol).

Heck, I could drain my battery in less than 10min @137db. Headlights would literally SHUT OFF as the bass hit. Was considering a 2nd alternator before it was all ripped off.
Madcat455 is offline   Reply With Quote
Old 11-25-2012, 01:01 PM   #13
helirich
Fullsize Member
 
helirich's Avatar
 
Join Date: Jul 2009
Location: Florida
Posts: 2,109
iTrader: (1)
Bronco Info: 90' 351/E40D 38" tires, 4.88 gears, full float 8.8, lockers F&R
Interesting idea. My understanding of a alternator is that it senses the bat volts and puts a charge on if needed. So if you wire two in parallel and there was enough draw to exceed one alternator, I'm sure it would work fine. The question I have would be, would they share the work?

For example, if one alternator was running and not to max output, the volts would be at aprox. 13.5. So if you connected a second alt, it would sense that voltage and determine that no charge is required.

Of course if both were hooked up from the start, maybe they would share. But maybe one would start charging a little before the other and the only time the second would come into play was when the first was exceeded. (and the voltage dropped)

I guess you could run two "one wire" altenators to two selinoids. Then you could pick which alternator you want to run that day (or both if needed)

My opinion would be that the only reason you would want two alts is for redundancy. If you want more power, get a bigger alternator.
helirich is offline   Reply With Quote
Old 11-25-2012, 02:20 PM   #14
bulrid8
Registered User
 
Join Date: Feb 2012
Location: South Carolina
Posts: 176
iTrader: (0)
Bronco Info: 1990 4x4 351w
Most Ford ambulance packages run dual alts.

One charges dual batts in truck and one charges dual batts in the box.

For just dual batts I would run a higher output single 3g. Keep it simple.
bulrid8 is offline   Reply With Quote
Old 11-25-2012, 04:09 PM   #15
DNBELOWBRONCO
Registered User
 
DNBELOWBRONCO's Avatar
 
Join Date: May 2007
Location: Sunny California
Posts: 1,517
iTrader: (10)
Bronco Info: '96, 5.8, 4.56, 4", 35's, Thorleys, Warn 8274, 5100's, 160 3G, Sag, 10.25, E-fan, Projectors, 8-Lug
I have Ryan's 3G 160 set-up and it works fine with HID's, Stereo, winch, and rock lights. I run a single Walmart Everstart Maxx 850cca battery and at some point will buy another and will run them together with an isolator just for peace of mind off-road. I have used Motorcraft batteries, Optima yellow & red tops, and Ever-Ready's but for the money the Maxx with it's 7 yr 3 yr free replacement warranty has never let me down and can be returned to any Walmart in the U.S. and you know there's tons of them in every town. The isolator will let you run them both or use one for wheelin' and winchin' and rockin' out in the camp site and still have a charged one to get you home while it charges up the first one. I think the thing I like best about it is you can use one battery to "jump start" the second in an emergency! Really dual 850's and a 3G 160 should be all you need anywhere with way less clutter! -Kevin-

Check out Steve's post above, http://www.supermotors.net/registry/media/905321, and his link to his Supermotor's site with the Ford isolator wiring schematic....
__________________
DON'T GIVE UP PUSH THE PEDAL ON THE RIGHT JUST A LITTLE BIT HARDER DNBELOWBRONCO www.supermotors.net/17883

"Be who you are and say what you feel because those who mind don't matter and those who matter don't mind" -Dr. Seuss-
DNBELOWBRONCO is offline   Reply With Quote
Old 11-25-2012, 04:50 PM   #16
JohnMcD348
FSM Lifetime
 
JohnMcD348's Avatar
 
Join Date: Mar 2009
Location: Lakeland, FL
Posts: 3,739
iTrader: (1)
Bronco Info: 92 Factory Original 300 I6 M5OD Manual Custom. 3 seats, AC and a radio. That's It. Not even Carpet.
Just as everyone else has pretty much said, stay single with a Hi output 3G unless you are looking at doing something like an onboard stick welder setup or something like that. Unless you're running a setup that's requiring massive amounts of power like an emergency vehicle, I doubt going to a 160a 3G wouldn't solve any problems
__________________
JTMcD.
We sleep Peaceful in our beds because Rough Men stand ready in the night to visit violence upon those who would do us harm............George Orwell
The object of life's journey is not to arrive at the grave safely in a well preserved body, but rather to skid in sideways, totally worn out, shouting, 'Holy Shit, What a Ride!!! -- Mavis Leyrer

MY A/C Vacuum leak repair http://fullsizebronco.com/forum/showthread.php?t=175808
JohnMcD348 is offline   Reply With Quote
Old 11-25-2012, 08:53 PM   #17
helirich
Fullsize Member
 
helirich's Avatar
 
Join Date: Jul 2009
Location: Florida
Posts: 2,109
iTrader: (1)
Bronco Info: 90' 351/E40D 38" tires, 4.88 gears, full float 8.8, lockers F&R
The reason for doing this would be for redundancy. (if your alt quit, your other takes over) lets face it, you could have two batts and a 160 amp alt. but if that alt quits at night, you could run the battery's down before getting home. (depending how far you were.)
helirich is offline   Reply With Quote
Old 11-25-2012, 09:10 PM   #18
BigBlue&Goldie
Registered User
 
Join Date: Oct 2009
Location: Gilbert, AZ
Posts: 170
iTrader: (1)
Bronco Info: 1993 XLT, 5.8L, E40D, Stock......for now!
Quote:
Originally Posted by helirich View Post
The reason for doing this would be for redundancy. (if your alt quit, your other takes over) lets face it, you could have two batts and a 160 amp alt. but if that alt quits at night, you could run the battery's down before getting home. (depending how far you were.)
This is why we carry an extra in our race car. Swapping an alternator is cake, so its not worth it in our eyes to run duals, and we are all about dual everything.......fuel pumps, ignitions, CV boots, belts, etc.
BigBlue&Goldie is offline   Reply With Quote
Old 11-25-2012, 10:23 PM   #19
Kalashnikov
Registered User
 
Kalashnikov's Avatar
 
Join Date: Feb 2008
Location: Uxbridge, MA
Posts: 1,172
iTrader: (5)
Bronco Info: 95 F150 EB 351-E4OD 4x4, 89 F350 CC 7.3-E4OD, 93 F350 CC 7.3IDI Turbo ZF5 4x4
The new trucks, the diesels at least, have a dual alternator option.

The 80-96 diesel trucks with dual batteries have the battery terminal on the passenger side for the positive with a "T" with battery cable coming out both sides. One side goes to the starter and the other right to the second battery's positive terminal.

I plan to add second 3g and 2500 watt power inverter (continuous wattage).
__________________

93 F350 4x4 Crew Cab 7.3 Turbo IDI ZF5 3" DP, BB injectors
89 F350 CC-7.3-E4OD 40x18 Ground Hawgs, winch bumper, 12klb winch, 5" stacks, turbo pump, BB injectors
95 F150 EB 5.8-E4OD Aussie locker, leveling coils, 94 F150 XLT I6-E4OD 90 F350 XLT 7.5 C6
Kalashnikov is offline   Reply With Quote
Old 11-26-2012, 02:05 AM   #20
DNBELOWBRONCO
Registered User
 
DNBELOWBRONCO's Avatar
 
Join Date: May 2007
Location: Sunny California
Posts: 1,517
iTrader: (10)
Bronco Info: '96, 5.8, 4.56, 4", 35's, Thorleys, Warn 8274, 5100's, 160 3G, Sag, 10.25, E-fan, Projectors, 8-Lug
Quote:
Originally Posted by BigBlue&Goldie View Post
This is why we carry an extra in our race car. Swapping an alternator is cake, so its not worth it in our eyes to run duals, and we are all about dual everything.......fuel pumps, ignitions, CV boots, belts, etc.
That's actually how I will be doing it after I buy another battery and the isolator switch. For me it would be easier and I am a huge advocate of having spare parts handy whenever I go camping, wheeling, or on extended road trips like SoCal etc. I used to keep a spare 65 amp alt after replacing mine just so I would have a trail spare but sold it after upgrading to the 160. Good you mentioned it so I can add it to my future, (my wife's gonna divorce me) , parts list.
-Kevin-
__________________
DON'T GIVE UP PUSH THE PEDAL ON THE RIGHT JUST A LITTLE BIT HARDER DNBELOWBRONCO www.supermotors.net/17883

"Be who you are and say what you feel because those who mind don't matter and those who matter don't mind" -Dr. Seuss-
DNBELOWBRONCO is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  FSB Forums > Bronco Discussions > Noobie Bronco Tech Questions. Flame free zone!


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 05:12 AM.


2003-2009 FullSizeBronco.com. All rights reserved