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View Poll Results: Ground Option
1 3 60.00%
2 2 40.00%
Voters: 5. You may not vote on this poll

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  #1  
Old 02-26-2011, 08:25 PM
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Ω rise is way too high..
 
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Default Grounding Ideas, Build Help

Alright, so I am throwing back and forth the idea of the build on my Malibu. It's a daily rider that will compete in SSNW. I am throwing back some ideas and have heard from each side, but I can get a larger group of ideas online then I can talking to individual people. I would put this in the build log, but I am putting a poll with this, and can get more responses faster with a new thread. This would be a place for some useful information to others as well. There are my 2 areas of thought. I am doing 2 runs of 4/0 wire, and have these 2 possibilities.

1. Run one wire hot (positive) and one ground (negative). I always thought that this would be the proper way to go. Make a complete circuit (modern theory of current flow) of alternator to front battery, through wire to back battery, into the amplifier, into the subwoofer, back to the amplifier, back to the back battery, through the wire to the front battery, and to ground. I never really thought of option 2 seriously until it was brought to my attention today.

2. Run both wires hot (positive) and ground (negative) one in the front and one in the back, using the cars frame to proved a closed circuit. This makes more current flow possible, and does not use the wire as a source of power if the car is off. This provides more power when the car is on and the alternator is running, but less when it is off. Since I would be competing with the car on and obviously driving with it on, this is now also an option.

I am putting a poll in this for popular vote, but the main decision will come with proper explanation of answers. Please provide. Thanks guys!

-Steve
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  #2  
Old 02-27-2011, 08:13 AM
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Other opinions..?
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  #3  
Old 02-27-2011, 08:20 AM
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Lol I did both just to make sure and since it will take the path of least resistence its a win win for me
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Old 02-27-2011, 08:23 AM
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i would run both a postive and a negative from the front to the back battery and run the amps right off the back battery if i was u wire. run from alt + to front batt then from that batt to the + to the back batt then take the ground from the alt to the back battary then from the back battery to the front that way the alt is seeing both batterys as one
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Last edited by Sinister-David; 02-27-2011 at 08:29 AM.
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  #5  
Old 02-27-2011, 08:42 AM
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get a 3rd wire and run 2 positive between batts and 1 negative between batts... and also use the frame grounds... then u have best of both worlds for an extra ~$50-75
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Old 02-27-2011, 07:41 PM
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Quote:
Originally Posted by Decaf View Post
get a 3rd wire and run 2 positive between batts and 1 negative between batts... and also use the frame grounds... then u have best of both worlds for an extra ~$50-75
Maybe if I can get away with it, might not have enough after a big3 in 4/0!
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  #7  
Old 02-27-2011, 09:11 PM
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Current flows from negative to positive in a battery. So grounding to the frame does not increase effencey. The ideal way is to do 1 and 1. IMO
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Old 02-28-2011, 12:56 PM
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Quote:
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Current flows from negative to positive in a battery. So grounding to the frame does not increase effencey. The ideal way is to do 1 and 1. IMO
I know it does, I think 1-1 will be the way to go, just gathering information. Always a good idea.
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  #9  
Old 02-28-2011, 12:57 PM
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Well there are more votes for option 2, but no one has spoken up!
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  #10  
Old 02-28-2011, 01:05 PM
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As decaf said, do both. I have 2 runs each to back and also have back batteries going to chasis.
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