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6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.

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Old 12-21-2009, 04:37 PM   #1 (permalink)
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6.0 Alternator

i have a 2004 Ford Excursion. The alternator is only putting out about 11.9 volts at idle, and i just replaced the batteries. i believe the internal voltage regulator is not working properly.

i want to replace the alternator for a high out put one, i noticed that there is some confusion on if i can put a "HI output large case 6g" where the stock small case 6g is.
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Old 12-21-2009, 04:51 PM   #2 (permalink)
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Originally Posted by Justin Merritt View Post
i have a 2004 Ford Excursion. The alternator is only putting out about 11.9 volts at idle, and i just replaced the batteries. i believe the internal voltage regulator is not working properly.

i want to replace the alternator for a high out put one, i noticed that there is some confusion on if i can put a "HI output large case 6g" where the stock small case 6g is.
Make sure you get the LARGE case G6, I have this one and it fits perfectly.

Heres the link,

6G Series Heavy Duty Bridge Rectifier High Output Alternator
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Old 12-21-2009, 04:58 PM   #3 (permalink)
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Justin,

How soon do you check the output volts after starting your X? The reason I ask is these alternators have a delayed charge output regulator due to the glow plugs drawing so many amps at startup. I have noticed they kick in about 2-3 minutes after startup on my 03 6.0 X. Not sure about the fit of the large case although I'm interested to see what you find out as I have replaced more than my fair share of stock alternators (working on the 6th) on my X. Also may want to look at the dual alternator setup if your running a lot of acc.

JR
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Old 12-21-2009, 05:21 PM   #4 (permalink)
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Justin,

How soon do you check the output volts after starting your X? The reason I ask is these alternators have a delayed charge output regulator due to the glow plugs drawing so many amps at startup. I have noticed they kick in about 2-3 minutes after startup on my 03 6.0 X. Not sure about the fit of the large case although I'm interested to see what you find out as I have replaced more than my fair share of stock alternators (working on the 6th) on my X. Also may want to look at the dual alternator setup if your running a lot of acc.

JR
That would be nice, but it is WAY too much money. Ive tried to convert mine since my first superduty had duals. It is easier and cheaper to just get a higher output alt than stock.

Anything north of 160 amps would be plenty, also quickstarts alts have a smaller pully so they run higher output at lower rpms[idle].

It bolts right up.
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Old 12-21-2009, 07:39 PM   #5 (permalink)
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well i let it idle yesterday while i went into the store ... all i had on was the heat, and headlights.... when i came out to the truck everything was super dim... and the heater blower was hardly running... i just put 2 batts in about 3 weeks ago... i have been checking the volts at idle about 10min after warming up....

and if i get a large case, 6G, 8 rib pully, 200amp max/ 140 @ idle that should bolt on .... just checking because there expensive and i have to get it shipped to alaska..

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Old 12-21-2009, 07:53 PM   #6 (permalink)
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what does the G stand for in 6G... and whats the diff between the 3G and 6G?
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Old 12-21-2009, 08:40 PM   #7 (permalink)
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what does the G stand for in 6G... and whats the diff between the 3G and 6G?
Dont know what the G means, but I think the 3 was before 99 and the 6 was after 99.
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Old 12-22-2009, 03:08 PM   #8 (permalink)
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Yes, they do fit. I put this one on mine just a short time ago from the same company. This is my 3rd Alternator, (emergency lighting, etc.. is taxing), plus the stock ones seem to be prone to failure with the bridge rectifiers. So, I went with the biggest I could. As said, just bolts up.

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Old 12-22-2009, 03:15 PM   #9 (permalink)
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Barrett,

Did you have to upgrade your wiring to work with an alt that big?? (BTW, long time no talk! LOL)
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Old 12-22-2009, 05:13 PM   #10 (permalink)
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Barrett,

Did you have to upgrade your wiring to work with an alt that big?? (BTW, long time no talk! LOL)
I added a 4 ga. wire to mine and added another 4 ga ground.
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Old 12-22-2009, 06:36 PM   #11 (permalink)
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humm...

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Originally Posted by dikkstarr View Post
I added a 4 ga. wire to mine and added another 4 ga ground.
Did the larger ga. wire help with anything noticeable...

I was thinking about doing a hyper grounding throughout the eng/trans/ alternator and body... i here the ricers do it and get a smoother voltage reading... but what ever, im gonna slap a large case 200amp or more
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Old 12-22-2009, 07:15 PM   #12 (permalink)
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Did the larger ga. wire help with anything noticeable...

I was thinking about doing a hyper grounding throughout the eng/trans/ alternator and body... i here the ricers do it and get a smoother voltage reading... but what ever, im gonna slap a large case 200amp or more
I didnt want 200+ amps going through that little stock fusable link. It would melt!

Have you ever tried to drink a soda through a stirrer straw?
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Old 08-05-2012, 04:45 PM   #13 (permalink)
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Quote:
Originally Posted by Justin Merritt View Post
Did the larger ga. wire help with anything noticeable...

I was thinking about doing a hyper grounding throughout the eng/trans/ alternator and body... i here the ricers do it and get a smoother voltage reading... but what ever, im gonna slap a large case 200amp or more
Whatever happened with the hyper grounding? Does it really help? How does it smooth out the voltage?
Not talking smack, just trying to see what is going on...
thanks again!
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