I just re-read that product info, and I get an F in reading comprehension

Now exactly what this does, I have not read yet, maybe a bit more reading on the site will get the answer, so it might be a combo of the 2 ( harness from them, and the battery isolator.

Didn't find it straight away in the articles list
http://www.dcpowerinc.com/articles/list

 

SSCULLY,
Great web site. Thanks for the find. I am sure when the time comes, this will be the product I use.

Others: http://www.dcpowerinc.com/dual-alter...-brracket.html As stated:
Why run dual alternators?

What if you had a separate charging system dedicated to the additional accessory load? By running dual alternators you can do just such a thing, and doing so leaves the factory charging system intact doing what it was intended to do, running the vehicle while the secondary alternator carries the additional accessory load. By effectively doubling the available amperage of the vehicle, you can run more accessories with less worry, and all for about the same cost as a single high quality High Output alternator.

 

well i see that no one has installed dual alts in an 07 f150 yet. thanks for everyones participation in the thread. what i was after was not seperate charging systems in the vehicle but a charging system consisting of dual batts and dual alts all working together as one system because i dont want to seperate accesories in the truck and have this run off that and that run off this using isolators and so on. is there no way to piggyback a second alternator off of the one that is in there and have it use the same voltage regulator inside the first alt to controll a second unit? can that be done use 1 voltage regulator to control 2 alternators or tie a second alt into the pcm controls that run the stock alt and have it control the second alt if they are the same kind?

 

You might get away with running older alternators in parallel, but I wouldn't try it with PCM-controlled.I don't think so. I think the VR would burn out.I think that would burn out the PCM.

 

jr if you ever get this figured out please let me, err, us know. I really want to do this as well.

 

i just finished rereading this entire thread and i missed the dual alt braket kit that sscully posted a link to. thank you sscully for finding this web site http://www.dcpowerinc.com/dual-alter...-brracket.html

that is excactly what i was looking for to be able to mount dual alternators on the 5.4 3v engine. it seems that the special relay they include makes the second alt act as a seperate charging system to be used with a isolated battery, accessory system. so i suppose im still hunting for a way to make both alternators work as one on the same electrical system not seperate.

 

since tungstontiller said it best ill just quote him. thanks everyone

sscully if you come across a way to make both alts work together without being seperated with isolators please post it for us thanks.

 

sscully let me ask you a question and give me your thoughts on it.
leave the factory alt like it is, make a bracket or purchase one for the 2nd alt, use a 2nd alt that can use a external adjustable voltage regulator. get the voltage output of the factory alt mine is usually around 14.2 v and set the 2nd alt external adjustable voltage regulator to around 13.8 v so that when the stock alt is loaded up and the volts begin to drop due to excessive amperage being drawn the 2nd alt will start supplying power and keep the volts at 13.8 v on the system. me personally i dont see any problem with it being set up like that. the stock alt will be doing all of the work all the time untill it is taxed and its capabilities are exceded for power output (but this is the case already) and then the 2nd alt will step in and help share the load and keep the voltage at 13.8 under heavy amperage draw. then when the heavy electrical loads are removed and the system voltage returns to 13.8v or above the 2nd alt will no longer supply current and it will just go back to the stock alt supplying the vehicles power. what do you think?

 

The part I am not sure of, is what will happen to the PCM if you hook it up like this.

The site above has a dual alt also has a special relay harness for the secondary alternator. Not sure how this would work any different than the method you describe ( which goes back to what will happen with the PCM ).

 

Nothing. From what I understand the alternator controls the flow of power and the PCM monitors. I'd just get a simple single wire alternator and add it in. Hardest part is the braket and belts.

 

has anyone ever been able to add a second alt to one of these trucks yet?

 

ttt

 

ttt ? anyone...

 

this setup should work on 04-08 ford f-150 with the 3v 5.4L









this is a 126 inch 8 rib belt with two ribs cut off BTW