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  #1  
Old 02-02-2011, 02:49 PM
ben10 ben10 is offline
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Default alternator question

hey guys with all the electrical i have in my truck, plus the stuff i want to do to it, i wanna upgrade my battery, but also my alternator, what kind of options do i have? is there an alt. that i can pull outta something else or do i have to buy a h.o. one from a store?
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99 extended cab, 4.0, auto, 33s, 4x4 lifted with some stuff done

98 2wd 2.5, 5 speed, dropped with some stuff done
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Old 02-02-2011, 03:02 PM
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Default Re: alternator question

There are a few other ford vehicles that work they are 130amp

is your truck auto or manual?

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Old 02-02-2011, 03:36 PM
ben10 ben10 is offline
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Default Re: alternator question

my truck is an auto

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so according to your post i have a 130 amp, is that sufficient? as of now i have a 600 watt amp, an aftermarket deck, HIDs and the normal factory stuff running off the truck, my plans include running rock lights in each fender, 2-3 hellas up front, 1-2 in the back for reversing, and maybe one more amp inside for the speakers. this is not all happening anytime soon, but it is the plan to have these lights eventually, will a 130 amp alt run all these if i have a good battery?
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99 extended cab, 4.0, auto, 33s, 4x4 lifted with some stuff done

98 2wd 2.5, 5 speed, dropped with some stuff done
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  #4  
Old 02-02-2011, 03:43 PM
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Default Re: alternator question

No those contain 130 amp that u could pick from a salvage yard.
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Old 02-02-2011, 03:44 PM
ben10 ben10 is offline
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Default Re: alternator question

i have a 98-2002 ranger tho, im a 99 ranger with an auto.
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99 extended cab, 4.0, auto, 33s, 4x4 lifted with some stuff done

98 2wd 2.5, 5 speed, dropped with some stuff done
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  #6  
Old 02-02-2011, 03:54 PM
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Default Re: alternator question

You would have to look at yours and see if that part number is there.
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Old 02-02-2011, 03:58 PM
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Default Re: alternator question

good to know, where is the part number on it? is it the barcode on top? i will have to go check it out.
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99 extended cab, 4.0, auto, 33s, 4x4 lifted with some stuff done

98 2wd 2.5, 5 speed, dropped with some stuff done
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Old 02-02-2011, 04:10 PM
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Default Re: alternator question

Should be a sticker with numbers
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Old 02-02-2011, 04:13 PM
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Default Re: alternator question

10-4 im on it!
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99 extended cab, 4.0, auto, 33s, 4x4 lifted with some stuff done

98 2wd 2.5, 5 speed, dropped with some stuff done
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Old 02-02-2011, 05:10 PM
FireRanger FireRanger is offline
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Default Re: alternator question

HID's draw LESS power than your stock lights, so you're actually helping the situation with those.

You're looking at about 75 amps worth of accessories at peak. The stock 90 amp alternator is not going to be able to handle that but I think a 130 amp model will. You should also put an overdrive pulley on it so it spins faster at idle.
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  #11  
Old 02-02-2011, 05:21 PM
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Default Re: alternator question

hmmm well i want an underdrive pulley too for the crank pulley, so i will need one regardless. but ill have to look into finding a 130 amp alt. what about batteries how big can i go in the stock location?
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99 extended cab, 4.0, auto, 33s, 4x4 lifted with some stuff done

98 2wd 2.5, 5 speed, dropped with some stuff done
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  #12  
Old 02-02-2011, 05:27 PM
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Default Re: alternator question

Go with a optima battery I think the yellow top is the better one.
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Old 02-02-2011, 05:30 PM
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Default Re: alternator question

i heard they are no longer gel celled... now they are packed glass... from what i heard they are no better than anything normal anymore, i havea friend that works at autozone, and he said people have been bringing them back as often as a normal battery...
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99 extended cab, 4.0, auto, 33s, 4x4 lifted with some stuff done

98 2wd 2.5, 5 speed, dropped with some stuff done
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  #14  
Old 02-02-2011, 05:44 PM
mickblock mickblock is offline
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Default Re: alternator question

If your looking to provide power to a high wattage audio system your on the right track with the high output alt. But to avoid power dips I've heard of people using audio capacitors to supply the amps. Something about battery power being to slow to supply wattage at the required rate, even when it's available in reserve. The rule of thumb being 1 farad of capacitance per 500 watts of amplification.

What do you have in mind for further electrical mods? Because there are also dual battery setups used on trucks with winches, plows etc.


Just stay away from high output alts that are merely stock alts that have new internal parts. You need a bigger frame for longevity. So the recommendation to head to the junk yard is a good one. You can also find legitimate sources on ebay.
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  #15  
Old 02-02-2011, 05:56 PM
ben10 ben10 is offline
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Default Re: alternator question

meh, a second battery will be a viable upgrade some day, and i have been reading about capacitors, and cant seem to get a strait answer on them, so many people say they are junk, idk.
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99 extended cab, 4.0, auto, 33s, 4x4 lifted with some stuff done

98 2wd 2.5, 5 speed, dropped with some stuff done
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