Alternator going out????

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Jul 22, 2007 | 01:34 PM

#16

PowerstrokeJunkie

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From: 21791

this one is shinier http://www.db-starter-alternator.com...0amp%20chrome?

Jul 22, 2007 | 04:01 PM

#17

countrycar

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HAA HAA HAA!!!! Welcome back ,if you are back Kris.

I haven't been around much myself lately. Nice Aleternator too!.Country

Jul 22, 2007 | 04:20 PM

#18

countrycar

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Big T My Excursion did the same thing. I checked it with a Scanner I have as I suspected the Alternator was bad. It showed the Alternator was only putting out 10.4 amps +/- at 12-1600 rpms. I installed a brand new 130 Amp Alternator from Kragen for $195. It came with a lifetime warranty too. Yeah I know It sounds funny. "Lifetime Warranty". But I've never had a problem with them honoring any returns I've made. Plus it's a bigger Amp unit than the Farctory which is rated at 95 or 110 Amps depending the one your truck has. Country

Jul 28, 2007 | 07:19 PM

#19

cangim

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From: Utah County, UT

Quote:

Originally Posted by clintbonnie

Odd.. according to Strokin link in the post above.. the 6G in the smaller one..
Does anyone have the actual physical differences between the 3G and 6G? When in 99 did Ford change to a smaller case?

Not sure when ford went with the smaller one. According to the paper work and the website I ordered from the 6G is the larger one. The diameter of the 6G is 6 inches where the 3G is 5 1/2 inches. Not much bigger but looking at them side by side, there is definately a noticeable difference.

From the way I understand it, the cheap way of getting a high output alternator is to go to three phases, which leaves less windings per phase. This is the reason why the first alternator I tried would vary in voltage output depending on engine RPM. The larger 6G allows for the same amount of windings but with the addition of the third phase. So far initial impression is good. I just finished with installing it, the voltage at idle is right at 14V once the batteries are charged, stayed right at 14V when I clicked it over to high idle as well

I will upload some pictures to my gallery shortly.

Jul 28, 2007 | 08:27 PM

#20

cangim

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From: Utah County, UT

Here is link to the gallery, the more I think about it, the 3G would make sense to be larger, as it was an older generation, hence the 3G maybe. In either case, the larger one is the one I put in.

https://www.ford-trucks.com/user_gal...&albumid=29427

Jul 28, 2007 | 08:31 PM

#21

cangim

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From: Utah County, UT

Quote:

Originally Posted by strokin_it7.3

did some researching, and found this out...

http://www.alternatorparts.com/Ford_7.3_Power_Stroke_Diesel.htm

which one would be best for supporting electrical fans?

This is the exact site I ordered mine from. Electric fan load really wouldn't be much of an addition stress. I really didn't need anything crazy high, just wanted something with a little higher output than stock. I went with the 140A HD, for my needs it will work fine as the 110A seemingly did the job fine.

Jul 28, 2007 | 10:02 PM

#22

Izzy351

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Joined: Feb 2007

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From: Dallas-Ft. Worth

Quote:

Originally Posted by strokin_it7.3

did some researching, and found this out...

http://www.alternatorparts.com/Ford_7.3_Power_Stroke_Diesel.htm

which one would be best for supporting electrical fans?

I would get the 160, Kris. Those dual-fans pull something like 35-45A, so 50A over the stock 110 would give you plenty of headroom. The 140 would probably do it, but I like headroom....

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