To all my stokers out there runnin snow plows, salters, lights, etc on ur super dutys, What size alternators are you running. I have the dual set up and am trying to figure which amperages i can run for upper and lower, and which amperages will run together best.

 

Don't have a plow, but I would do a 230 amp upper and 160 amp lower.

Josh

 

Leece/Neville, the part number is AVI160T2002-2 - High output alternator. I would use for your top alternator. Just get a stock 120 4g for the bottom, unless you can find a hooped up 4G for the bottom, anything over 140 amp would be good. The Leece/Neville comes with longer 3 mounting bolts, and a pigtail set, so you don't have to cut your alternator connection if needed, but my 2005 140 amp plugged right in. I also did an additional ground from the alternator to my passenger battery, and an additional charge cable from the alt positive post to the passenger battery. Again, by heavy duty cable and ends, I used double 0 and cable ends only need about 5 feet.

Low idle output by specification sheet is around 160 amps, at 1250 high idle 180. Judging by voltages and how fast the alternator shuts off, it's easily doing that but I don't have a DC amp clamp meter goes that high.

It's a beast, twice the weight of stock, looks about 30% larger. You can see the pics in my gallery. When my truck is first started and it switches on it actually drops the idle speed about 25 rpm and you can here the engine working. Make sure you have a new belt and idler pulley, it barely fits but does just get the belt on.

I bought through am international truck dealer so I get warranty and my brother is the parts guy. He bought one for his 2004 as well. I am totally happy I sent him the link to the thread. The alternator is what goes in the medium duty 5 and 8 tonne international trucks with vt365 engine. I also got the battery cable and ends at the truck shop they carry lots.

If you are having fun with install, we can chat. It's no problem. This is a cut and paste from another message but think it will serve you well. Even if you just upgraded the top alt and when it did get hot it would switch over to the smaller one for a while, and then back. You would have 360 amps of alt with a stock 120 lower.

 

The Prestolite conversion harness is for 94-97 7.3 Powerstrokes.

I have installed that alternator on 2 of our VT275 delivery trucks.

Josh

 

So i am going to have to go outside of motorcraft to get a higher output alternator correct? 140 amp is the highest i can find so far for an upper motorcraft.

 

You would be money ahead to aftermarket IMHO. Motorcraft alternators are marginal at best.

 

Correct, 140 is the highest OEM.

There is also a 160 amp upper from Visteon, about $100-150 less than the Prestolite 230 amp.

Definately have to go aftermarket for anything over 120 amps for the lower 4G alternator.

Josh

 

Im looking right now at the aftermarket ones. I think thats the road i want to take. Its just finding where and how much to buy for. Last question. So if i do go with a 230 amp prestolite, I can still put in a 120 or 140 amp stock motorcraft for the lower?

 

DC alternator from FICM Repair.com - Your Source for FICM Repair

 

DC doesn't do 4G alternators.

The options are Quick Start, Singer, Mech-Man, auto Electric and others for 140+ 4G

Josh

 

But he could still go with a big upper and leave the 140A lower and be OK, wouldn't you think?

 

Stock lower is 120 amps, but yes an upgraded upper would be a good sized step in upgrading the system to run plow pumps and anything else.

What I do like is the Visteon 160 amp and Prestolite 230 amp are available at heavy truck and International dealers. Although somewhat inconvenient compared to Auto Zone etc, a guy still has coast-to-coast warranty coverage available.

Kind of like the warranty repair with Ed. I need to send my FICM in for warranty work, but can't shut down for a week or more for shipping and repairs. That sucks ya know?

Josh

 

Since none of the diesel/ heavy trucks are open here Josh, do you know any prices on the high output alternators. If not exact, maybe a ballpark idea?

 

And your thinkin the Visteon 160 on the lower and prestolite 230 on the upper? Or the visteon 160 on top of a 120 stocker?

 

Upper: 160 Visteon is about $175-200 or 230 amp Prestolite is $300-400 depending on where you get it.

http://www.ebay.com/itm/120996576027?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
http://www.ebay.com/itm/400327203540?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
As for the Lower: For coast-to-coast warranty I believe the regular 120 amp is your only choice.

Otherwise you can do this for example:

http://www.ebay.com/itm/HIGHAMP-FORD-Windstar-Alternator-96-98-V6-3-8L-4G-200-AMP-TAURUS-96-99-3-4L-/131105563011?pt=Motors_Car_Truck_Parts_Accessories&hash=item1e86802183&vxp=mtr
That was an example for the lower 4G, I do not know their quality of work etc...

Josh