Dual Alternator Setup

[jdparadee]

i tried searching but came up empty handed. does anyone have a dual alternator setup on their PSD? for those that run a lot of accessories and need the extra amperage. i can't seem to find a whole lot of info on it. i have heard that you can get navistar alternators that are huge to replace the stock one, anyone shine validity on that and offer any input? thanks.

[wiyrs]

go to an alternator rebuild place, as them to respin ur current one, had that done to mine and they got 220amps out of the stock one, but they upgraded the case from a small to a large 6g case, cost me 150$?

[03_Turbo7.3]

im pretty sure ford still sells the dual alt kit for these trucks..


1) New factory (2nd) alternator purchased off eBay for .... $60 from an ambulance conversion company that takes them off new.

2) The factory second alternator bracket is readily available from Ford. F8TZ*10A313*AA. You need to specify the "passenger side". Althought the brackets are the same part number, they are definitely not the same bracket. $130.45

3) You need an additional idler pulley that bolts into the new bracket. F8TZ*8678*FA. $20.48

4) You need three replacement bolts. Two of which will replace existing bolts (shorter ones.) that fit into the a/c mounting bracket. The other one replaces a bolt (shorter one.) that fits into the front of the engine block. It holds down the main groundng cable on the back side, and holds the tranmission cooler and wiring set on the front side. N606068-s100 (x2) and W701844-s309 (x1). The nut on the latter bolt is reusable.

5) You need three alternator bolts. These are the same as the bracket hold down bolts. N606068-s100.

6) I was sold a wiring harness that was designed for the original 110 amp alternator that Ford offers in the dual optional alternator set up. The plug is not the same if you get the standard PSD alternator. These are AMP brand connectors and the plug pins can be released and snapped into the other plug. When I got my alternator from eBay, it had the factory plug and about 3 inches of each wire. You may need the plug. The color coding is not correct either, but you're only dealing with three wires....... deal with it. F81Z*14305*CA $45.97

7) Finally, you'll need a new serpentine belt. Dual alternator option. JK8*1381* $66.18.

[wiyrs]

Originally Posted by 03_Turbo7.3

im pretty sure ford still sells the dual alt kit for these trucks..


1) New factory (2nd) alternator purchased off eBay for .... $60 from an ambulance conversion company that takes them off new.

2) The factory second alternator bracket is readily available from Ford. F8TZ*10A313*AA. You need to specify the "passenger side". Althought the brackets are the same part number, they are definitely not the same bracket. $130.45

3) You need an additional idler pulley that bolts into the new bracket. F8TZ*8678*FA. $20.48

4) You need three replacement bolts. Two of which will replace existing bolts (shorter ones.) that fit into the a/c mounting bracket. The other one replaces a bolt (shorter one.) that fits into the front of the engine block. It holds down the main groundng cable on the back side, and holds the tranmission cooler and wiring set on the front side. N606068-s100 (x2) and W701844-s309 (x1). The nut on the latter bolt is reusable.

5) You need three alternator bolts. These are the same as the bracket hold down bolts. N606068-s100.

6) I was sold a wiring harness that was designed for the original 110 amp alternator that Ford offers in the dual optional alternator set up. The plug is not the same if you get the standard PSD alternator. These are AMP brand connectors and the plug pins can be released and snapped into the other plug. When I got my alternator from eBay, it had the factory plug and about 3 inches of each wire. You may need the plug. The color coding is not correct either, but you're only dealing with three wires....... deal with it. F81Z*14305*CA $45.97

7) Finally, you'll need a new serpentine belt. Dual alternator option. JK8*1381* $66.18.

alot more money then a respin

[JSchuricht]

Originally Posted by wiyrs

alot more money then a respin

But you'll get much more current and reliability vs. some rewound alternator that dosn't putout any current at low RPM and burns itself out prematurely.

[Snake]

There's been a lot of discussion about dual alternators and single alternators on the boards I frequent. The consensus was that if you have a single alternator and need an upgrade, the best and easiest option was to go with another single alternator that puts out most of its rated amperage at idle. There were a bunch of us (myself included) who bought an upgraded alternator from High Output Alternator, 200-250-300-350 Amp Alternators, high output alternators, Delco Remy,Ford Truck Alternators I ended up with a 200a, but they make 250a if you need more.

You can take my word for it that these are high quality alternators, or you can do a lot of research but you'll probably reach the same conclusion I reached.

[wiyrs]

Originally Posted by JSchuricht

But you'll get much more current and reliability vs. some rewound alternator that dosn't putout any current at low RPM and burns itself out prematurely.

mines has a lifetime warrenty and put out 190 amps at idle.. i had them respin it for my car audio needs. so i need all my amps at idle

[Snake]

Originally Posted by wiyrs

mines has a lifetime warrenty and put out 190 amps at idle.. i had them respin it for my car audio needs. so i need all my amps at idle

Did you have it bench tested yourself or is this what the manufacturer claims? I ask because a lot of the same people I reference in my post above purchased an alternator that claimed to make a certain percentage of its rated output at idle and didn't even come close.

[JSchuricht]

I'm with Snake on this one. Most of the rewound units either can't keep up at idle or have a different size pulley spinning them faster and wearing them out quicker.

[Snake]

Originally Posted by JSchuricht

.....or have a different size pulley spinning them faster and wearing them out quicker.

That was the other point I forgot to mention.

Thanks for keeping me honest.