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Old 11-04-2011, 08:07 AM   #181
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2are grounds that will be connecting front battery to rears...I will also be grounding them to the body of the car .yes 6 runs is to reduce voltage drop as the class I had previously run only only allowed for a single battery . I am now building a wall for 6-8 10" subwoofers in a 4th order bandpass wall .
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Old 11-04-2011, 09:36 AM   #182
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you realize that the grounds don't need to be connected directly to the battery, just grounded to the car? A run that long kind of defeats the purpose of a ground.
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Old 11-04-2011, 09:40 AM   #183
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It still will make a difference ...especially when going for a .1 gain on a termlab
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Old 11-04-2011, 05:41 PM   #184
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Direct grounds are good. No harm in having them. It will eliminate the resistance in the welding points of the car. A lot of people actually run grounds from the front to the rear that are doing competitions because it does help gain on the meter by having less resistance for your grounds. If you think about it, when you ground to the car, it still has to travel to the front battery. So when you eliminate the possibility of resistance, you gain on the meter and voltage!
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Old 11-04-2011, 11:20 PM   #185
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Direct grounds are good. No harm in having them. It will eliminate the resistance in the welding points of the car. A lot of people actually run grounds from the front to the rear that are doing competitions because it does help gain on the meter by having less resistance for your grounds. If you think about it, when you ground to the car, it still has to travel to the front battery. So when you eliminate the possibility of resistance, you gain on the meter and voltage!
thats why you ground to the frame of the car, so that way the welds and anything else doest get in the way. it is always best to ground everything straight to the frame.
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Old 11-04-2011, 11:56 PM   #186
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thats why you ground to the frame of the car, so that way the welds and anything else doest get in the way. it is always best to ground everything straight to the frame.
This is what i have always heard
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Old 11-05-2011, 02:42 AM   #187
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Yeah but I was talking about competitions since he said he goes to them. Grounding to the frame is one of the best ways to ground, but it's still only as good as the grounds to your frame are under the hood. The more wires you have and connection points, like ring terminals, the higher the resistance is. So that may be the difference in .1dB on the meter. But for mostly everyone else grounding to the frame is the best choice as long as you have sufficient grounds under the hood to the frame. Even if you run 0 gauge to the amp, without 0 gauge grounding to the frame from your front battery, your 0 gauge just became limited to the stock wiring.

EDIT - thats why you should have more grounding points than just one under the hood as well.
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Old 11-05-2011, 11:25 AM   #188
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and if you upgrade your grounds though out the car then to the frame and as short as possible it still the best.
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Old 11-05-2011, 12:17 PM   #189
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The whole body of the car, even when grounding to the frame, acts like a long wire. The ground wire to your rear battery or amp still has to travel to the front. The one wire for the ground results in less resistance from terminals. Believe it or not, each ring terminal you use adds resistance no matter how you put it on (solder or crimp). That little bit adds up for the people in competitions and can gain on the meter.

But like I said the only people who really do that are the ones that have their vehicle dedicated to competitions or who are widely involved in it. And even then you will find people running to the frame. I'm not argueing that grounding to the frame is bad, I'm saying that is why people run a seperate ground sometimes.
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Old 11-05-2011, 07:03 PM   #190
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i understand what your saying, i just dont think that running a wire front to back would make a difference in the ground. also you still put a terminal end of some kind at both sides of the wire even if its going from under hood to trunk. rather then a ground from front to back 2 grounds in back to me is more reasonable.
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