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Old 01-11-2014, 06:03 PM   #1
davindeadly
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Big 3 Upgrade/Remote Battery? 2009 MK2

I'm looking to do a "Big 3 Upgrade" and relocate my battery to the trunk on my MK2 for a couple reasons.

1. I'm running an 1100W RMS Hifonics Brutus amp, pushing a Rockford Fosgate T1D212, and lemme just say this amp is a monster, it puts a massive drain on my electrical system.
2. I'd prefer the cleaner look under the hood.
3. The overall improvement in electrical performance.

Seeing as though I already have 0 awg wire ran from my engine bay to trunk for my amp, I was just going to use that for the main "Alternator to Positive Battery."
Now, I know on a normal "Big 3 Upgrade" you normally would use the same gauge wire across the board, and that most people only use 4 awg when upgrading. But on a normal upgrade they usually haven't moved the battery to the rear, so this is what I was wondering.

A) Would it be acceptable to use 4 awg for the "Engine to Chassis" and the "Battery Negative to Chassis" grounds?
B) It looks like the engine grounds to the battery and then the battery grounds to the chassis, correct?
C) It also looks like there are two leads coming from the positive? One going to the starter, and then one going in to the fuseblock, with a lead coming off the fuseblock to the alternator, correct?

Any information would be great guys, I've looked around here a few times but there's not much information in regards to Duratecs. Thanks in advance!


Oh, and by the way...


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Old 01-11-2014, 08:34 PM   #2
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Well on my 2.3 Duratec, I did the alternator to battery positive with a 150 amp in line fuse and battery to chassis and engine to chassis grounds. I used the bolt that holds the engine lift eyelet for the engine to chassis ground. Also there should be 2 grounds behind the driver kick panel and one behind the passenger kick panel. Clean those and remove the paint from the holes they ground to, do that on the existing battery to chassis ground as well, it will greatly improve the ability to ground without the paint in between metal contacts.

I used 6 AWG wire, but have no audio upgrades, I did it just as a means to improve my cars electrical system as a whole.
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Old 01-11-2014, 11:31 PM   #3
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i just did mine









I used a kicker fuse between my positive cable and my remote cable as you can see. leave the negative battery cable alone as it has a ground already(cut the terminal off if you want), all you need is to take the cable to trunk. since the picture i relocated the battery to the other side of my trunk to get a better chassis ground. Warning if you don't get a good chassis ground it will screw with all the modules in the car(learn my from my mistakes). I used the screw on the drivers side(nut holding on the bumper.
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Old 01-13-2014, 04:44 PM   #4
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Looks good! So all you did was relocate the battery then? No, Big 3 Upgrade?

I need to do the Big 3 cause of the draw from my amp, it's really putting a draw on my electrical system, lights dimming etc. I'll do a how to or something when I finally get everything together.

Edit: I'll be upgrading the battery as well.
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Old 01-13-2014, 05:10 PM   #5
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yeah dave tell us when you grounded the alt at.
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Old 01-13-2014, 05:56 PM   #6
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Quote:
Originally Posted by badazz2010focus View Post
yeah dave tell us when you grounded the alt at.
I've never seen a Big 3 Upgrade where the Alternator ground was altered. But if you were going to upgrade the alternator ground, I would more than likely ground in the same spot it was! And clean up the area around the ground like GreySkorpion suggested.
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Old 01-13-2014, 06:28 PM   #7
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Subbed to see how you do this... Might invest in it myself
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Old 01-13-2014, 06:36 PM   #8
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Subbed to see how you do this... Might invest in it myself
I've already got a plan drawn up paper, I'd be more than glad to draw something up on MS Paint and post it on here for you and everyone to check out if your interested!
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Old 01-13-2014, 06:59 PM   #9
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I've contemplated a battery relocation and second battery install before. I just can fund $400 for the battery relocation, and then another $800 for audio stuff at the moment. Just curious to see how your route compares ad differs to mine.
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Old 01-13-2014, 07:15 PM   #10
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Quote:
Originally Posted by ItsMcCoy View Post
I've contemplated a battery relocation and second battery install before. I just can fund $400 for the battery relocation, and then another $800 for audio stuff at the moment. Just curious to see how your route compares ad differs to mine.
I feel you, bro. I bought my audio stuff piece by piece and I'll probably end up doing the same thing with this stuff.
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