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  #1  
Old 07-16-2009, 05:00 PM
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HO Alternators.

My truck has a car pc system and even with it not being fully installed, the alternator cant keep up. I need a beefier alternator, but I see that not many people make a HO Alt for the Dakota or the Durango. I myself have a 03 Durango SLT 4.7. I found one from a company called powerbastards, but I wonder if 220 AMPS is enough?

Here is the link to the ALT. http://powerbastards.com/proddetail....=Fitzall%2D220

Does anyone know of maybe a 300 AMP Alt that fits on the 4.7 Magnum V8?

My setup is going to be as followed:

2 Alpine PDX 4.100, 500 watts ea
1 Alpine PDX 1.600, 600 watts
7 Lilliput screens, 7 watts ea
1 Eonen 19 inch, 15 watts
1 Eonen 10.2 inch, 10 watts
1 Dual Core PC, 320 watts
6 Single Core PC, 250 watts per 2
All little devices come out to about 30 watts total,

So thats around 2,774 Watts the system may need..... can a 220 AMP ALT handle that?
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  #2  
Old 07-16-2009, 05:35 PM
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whats the amperage at idle? 220 amps at 3000 rpm does ya no good.
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Old 07-16-2009, 06:26 PM
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says it does 110 at idle and 220 at 1200 rpm
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Old 07-16-2009, 07:00 PM
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you need to do some better searches, there have been other people looking for these and there are several out there
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Old 07-16-2009, 07:05 PM
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says it does 110 at idle and 220 at 1200 rpm
missed that part...der. Thats pretty good.
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Old 07-16-2009, 08:37 PM
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220 amps should be good enough for you. You'd be pullin around 230amps at 12 volts with all the stuff on your list runnin wide open.
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Old 07-16-2009, 09:08 PM
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Thanx for your help guys. I do not think it will all run wide open 100% so 220 should be good.
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Old 07-16-2009, 09:24 PM
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It says 110 at idle, but what does it consider idle RPM, what size pulley is on the alternator compared to stock? might be bigger or smaller and actually throw off the numbers. Also some manufactures like to pad thier numbers to sell alternators. I had a 160amp "high output" alternator I bought off Ebay that was worse at idle than my stock alternator.
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Old 07-16-2009, 09:50 PM
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There are also a few out there that will push some power but create some alternator whine as well
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Old 07-17-2009, 01:08 PM
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Called that company yesterday they do not make a high output for the 4.7 Durangos
They only make a HO GM style 1 wire alternator that will require you leave the factory harness disconnected from the new alternator causing a Mil light to come on Also they stated that the mounting may require some modification
I have tried excessive amperage alternators 3 times and every time the alternator worked good but caused alternator whine.
Put on my stocker and noise was gone completely
Just recently got a new 160 stocker and ity makes no noise as well
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Old 10-26-2009, 08:25 PM
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Quote:
Originally Posted by FSTDANGO3 View Post
Called that company yesterday they do not make a high output for the 4.7 Durangos
They only make a HO GM style 1 wire alternator that will require you leave the factory harness disconnected from the new alternator causing a Mil light to come on Also they stated that the mounting may require some modification
I have tried excessive amperage alternators 3 times and every time the alternator worked good but caused alternator whine.
Put on my stocker and noise was gone completely
Just recently got a new 160 stocker and ity makes no noise as well
Don't know why I missed your post. I actually ended up buying the 220 amp, but it is so hard to get mounted, and the manufacturer doesn't even know the specs to his own product. This thing seems to be geared more towards imports and cars with small alternators that do not have the room. I will most likely go with the 160 that you suggested. I just hope its enough to power everything I have.

I am curious to know if anyone is running a large setup like mine and if the 136 or 160 can handle it easily.

PS: Is there a dual alternator bracket setup for the Durango? That would solve alot of issues!
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Old 10-27-2009, 12:59 PM
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Get a new 160 and Run Dual Batteries
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  #13  
Old 10-27-2009, 01:55 PM
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Originally Posted by FSTDANGO3 View Post
Get a new 160 and Run Dual Batteries
Yea, but there is no challenge in that. Plus I have the 220 laying around. See, the 220 is basically bad at replacing the stock alternator, but adding it seems to be easy.

Now when adding it, should I worry about heat issues? How much space should I give this thing. I see that the engine bay looks less cluttered in the 5.9. My 4.7 is full of electronics and crap like that.
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Old 12-17-2010, 11:24 PM
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So, did you mount it as a secondary alternator? I am looking for pics of a 2nd alt install in a 2000-2003 dakota or durango
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Old 12-19-2010, 02:47 AM
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In the end, I sold the 220 HO alt and am now saving up for a 260 amp from DC Power. It puts out 200 amps idle, which is enough for me. Then I think at 1500 rpm it puts out the full 260 amps. The way the engine is, its to hard to do a dual setup. It seems easier to do on the 5.2 and 5.9 engines.
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