Dual alt kits, anyone? - JeepForum.com

 
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post #1 of 7 Old 07-12-2013, 09:42 PM Thread Starter
Jakes93yj
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Dual alt kits, anyone?

Hi guys, I need some help findnig a dual alt setup. i have my stock alt the a 117/136 amp alt off a Cherokee and a dual alt kit will be cheaper the a 220+ amp alt. Reason I want it is cause soon I will be running about 2 or 3 batterys, for my Sound system(I have INSANE voltage drop) and auxiliary lights( 2 100 watt KC lights) and possibly a winch soon. so anyone know where i can get a dual alt setup and a belt for it?

Thanks
-Jake

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post #2 of 7 Old 07-12-2013, 09:58 PM
sprngrider
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You will have to make one, but why bother? Get a 160a from a durango, 2 die hard platinums, and wire lights up like you are clark griswold

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post #3 of 7 Old 07-13-2013, 08:27 AM
Anticanman
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I suggest a dual battery system using some deep cycle batteries and try the GC alternator. If you have bad voltage drop, you'll want to look into a 1 farad cap wired inline to the amps to replace that drop you're experiencing. There's no way you'll need two alternators. I've dabbled in car audio in the past, what kind of system are we talking about?

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post #4 of 7 Old 07-13-2013, 10:52 AM
pete1991YJ
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If you have insane voltage drop then you have too much I2R losses and resistance... you need *much* bigger cables, try welding cable. Should be less than a quarter ohm per foot in the larger sizes.

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post #5 of 7 Old 07-13-2013, 12:49 PM
pasinbuy
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Think of another way as suggested. You alternator is a very large drain on Horsepower to your vehicle. Look at the inside of a exercise bike. They have a alternator to make resistance for the rider. Big drain on your motors power..
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post #6 of 7 Old 07-13-2013, 03:22 PM
pete1991YJ
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Actually no. The alt doesn't pull any more than a few HP, it isn't physically possible. Simple math: 1 HP = 746 watts. This equals 62 amps at 12 volts. 186 amps = 3 HP at the crankshaft. You will *need* at least 2/0 welding cable all around in order to actually get that much power out of a 186 amp alt. Like I said, check your cable size first and how good are your connections. Before you spend big money, get your total resistance as low as humanly possible.

BTW this applies even more for guys with winches.

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post #7 of 7 Old 07-15-2013, 07:54 PM
pasinbuy
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Pete, if your figures are right and I have no reason to doubt them. In my opinion that is a lot of HP.

If you can hear your motor slow a bit due to alternator draw which we all have to me that is a lot.
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