DIY: Big 3

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Old Oct 21, 2008 | 09:43 PM
  #1  
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DIY: Big 3

for those what have a sound system and no cap, this should help u if your lights dim when the bass hits

Parts and Tools:
-cable (i used 8ft but bought 10ft just in case, i used 1awg cable)
-flex tubing (optional, looks cleaner, got 10ft)
-heat shrink (protect cable and ring terminal from touching anything)
-string (measure how much cable u need)
-flat head screw driver (loose and tighten cover clips)
-knife or razor blade (cut wire insulation)
-pliers (cut cable to length)
-dermal (grind and cut some plastic)
-fuse (optional, i used 250A fuse, just in case something comes loose)
-ring terminal (sotter on end of cable)
-sotter and sottering iron (sotter ring terminal to cable)
- allen keys (secure fuse to cable)
-10mm and 12mm socket and ratchet (loose and tighten bolts)
-zip ties (zip tie flex tubing ends to keep in place)

cable and flex tubing
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ring terminals
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ring terminal sottered on cable
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heat shrink on terminal and cable
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grind this hump to attach fuse
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hump grinded away
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fuse installed, make sure that the screws dont hit your fan
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take cover off and unbolt bolt
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unhook batter, if u want u could upgrade your batter and put diff. terminals on at this time)
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unbolt nut, i had to unbolt the second nut and cut some of the plastic cover to make my ring terminal to fit)
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cable installed from alternator + to fuse
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cable installed from fuse to battery +
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complete cable from alt. + to battery +
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bolted alt. ground to the alt. here
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grind off pain here to attach alt. ground to chassis
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cable ran from alt. ground to chassis
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connect battery, and the battery - side to the battery
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connected to chassis from battery - ( bolted right behind the battery tray, make sure to remove any paint)
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install flex tubing (optional) for a cleaner look
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install cover and check out your work, start car and make sure everything is good
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Attached Images
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19coverwiresinflextubining.jpg (132.0 KB, 135 views)
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Old Oct 22, 2008 | 01:03 AM
  #2  
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Very nice! I started a thread about doing the Big 3 in the audio section and nobody had any pics of their set-up
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Old Oct 22, 2008 | 02:18 AM
  #3  
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good stuff.
will be doing this soon.
btw this isn't only for audio setups. you can use this if youre stock. its supposed to increase hp a little too.
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Old Oct 22, 2008 | 04:54 AM
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Originally Posted by eleventure
Very nice! I started a thread about doing the Big 3 in the audio section and nobody had any pics of their set-up
yup i know, i saw the thread. i decided to tackle it since no one had a diy and a couple ppl asked for one.
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Old Oct 22, 2008 | 09:45 AM
  #5  
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while we're kind of on the topic, how much good would a complete grounding kit do and how much work is gonna be involved? pull off old cables, throw new ones on right?
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Old Oct 22, 2008 | 09:46 AM
  #6  
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Nice. Who the hell signed your cover?
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Old Oct 22, 2008 | 09:58 AM
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Originally Posted by tegkid
good stuff.
will be doing this soon.
btw this isn't only for audio setups. you can use this if youre stock. its supposed to increase hp a little too.
It's worth doing just for your engine as well, u'll get better starting response from your car. The other good idea along with upgrading your + wires is upgrading all your engines ground wires as well, good write up, I have all my wiring to do this but haven't done it yet
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Old Oct 22, 2008 | 10:40 AM
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If you guys would like more information, I'd suggest www.realmofexcursion.com Its the best informational site for mobile audio, no questions asked.

For those of you who don't know why we do the Big3 upgrade, as Raj stated, it helps keeps the lights from dimming when a large amount of power is pulled from the vehicles electrical to hit those bass notes. Therefore, the Big3 pretty much stabilizes the vehicles voltage resulting in less voltage drop when bass notes do hit.

Yea yea, I know some of you use capacitors, but go to www.realmofexcursion.com and search "Why you don't need a capacitor" in the forums. This will pretty much tell you everything you need to know.
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Old Oct 22, 2008 | 02:04 PM
  #9  
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Originally Posted by JCharged
Nice. Who the hell signed your cover?
adrienne janic, the chick from overhaulin'
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Old Oct 22, 2008 | 02:18 PM
  #10  
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Originally Posted by Razzi
while we're kind of on the topic, how much good would a complete grounding kit do and how much work is gonna be involved? pull off old cables, throw new ones on right?
well, i payed:
$22.50 for 10ft of 1awg power cable (http://www.knukonceptz.com/productDe...rodID=KLMX0PRL)
$5 for 1awg shrink wrap (home depot)
$6 for 10ft flex tubing (home depot)
$15 for sotter and sottering iron (sears, used a torch also works since it was thick cable)
$18.22 for ring terminatls (http://happyterminals.com/index.php?cPath=21_34)
$5-$8 for therminals(sears, pepboys, autozone,...)
$12 for the fuse (http://www.knukonceptz.com/productDe...?prodID=ANL250)
$?? dremal (auto stores, home depot, menards,...)
$3 for zip ties (hardware stores, auto stores)
if u do it my way your gonna have to dermal some plastic, measure and cut cables, sotter ring terminal, change battery terminals, hook up cables, thats about it.
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Old Oct 22, 2008 | 08:22 PM
  #11  
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Originally Posted by Rajca
yup i know, i saw the thread. i decided to tackle it since no one had a diy and a couple ppl asked for one.


I just noticed the link on that thread. lol
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Old Oct 22, 2008 | 09:47 PM
  #12  
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I would do it Raj's way. The soldering for one keeps your mind at peace with no worries of cables coming out of the crimped connectors. And KnuConceptz wiring is pretty good stuff.
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Old Feb 20, 2010 | 01:59 AM
  #13  
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HI,
I am doing big 3 upgrade on 3g TL. I have couple questions.

Did you remove the positive wire from the alternator or did you just added a 0 gauge wire from alt. to battery?

Is the fuse required when you connect add the 0 guage from alt. to battery? i saw on couple other websites that people doesn't use fuse.
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Old Feb 20, 2010 | 04:41 AM
  #14  
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i added the cable from the alt to batt and the oem cable is still their. its not required, more a piece of mind and just in case scenario
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Old Feb 20, 2010 | 02:26 PM
  #15  
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great stuff
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Old Mar 1, 2011 | 07:55 PM
  #16  
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nice will try soon
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Old Mar 16, 2011 | 04:12 PM
  #17  
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I am trying to do this but now my car won't start.
The problem occurred after I removed the old alt to battery and replaced it with 0 gauge just as in the picture. I have yet to install the fuse on that wire but that shouldn't keep it from turning on right?
When I removed the wire from the fuse box will that effect anything? When I run power back to that box it works again.
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Old Mar 16, 2011 | 04:14 PM
  #18  
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Ok after reviewing the pictures I don't think I was supposed to remove that other wire... Shit.
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Old Mar 17, 2011 | 09:09 AM
  #19  
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Originally Posted by Rajca
i added the cable from the alt to batt and the oem cable is still their. its not required, more a piece of mind and just in case scenario
Rajca, any mod causing your hood not to completely close?
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Old Mar 17, 2011 | 09:52 AM
  #20  
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Originally Posted by Rajca
adrienne janic, the chick from overhaulin'
awesome! but her man voice..not so much.
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Old Mar 17, 2011 | 09:58 AM
  #21  
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Originally Posted by Nersh7
Ok after reviewing the pictures I don't think I was supposed to remove that other wire... Shit.
ALL those wires need to be connected.
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Old Mar 17, 2011 | 10:39 AM
  #22  
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Originally Posted by Nersh7
I am trying to do this but now my car won't start.
The problem occurred after I removed the old alt to battery and replaced it with 0 gauge just as in the picture. I have yet to install the fuse on that wire but that shouldn't keep it from turning on right?
When I removed the wire from the fuse box will that effect anything? When I run power back to that box it works again.
Of course you need the fuse in there. How else is the power supposed to be transfered over to the other side of the cable?

It's like telling someone to walkacross a river without a bridge. Unless they're Jesus of course. LOL
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Old Mar 17, 2011 | 10:51 AM
  #23  
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Ya after I took a look at it and used my brain I realized how stupid I was
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Old Mar 17, 2011 | 12:31 PM
  #24  
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Hood closed just fine. No problems at all
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Old Mar 17, 2011 | 12:39 PM
  #25  
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Originally Posted by Rajca
Hood closed just fine. No problems at all
Your avatar pic shows the hood not properly closed at passenger side.
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Old Mar 17, 2011 | 01:17 PM
  #26  
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If u notice that the big 3 was done on my ssm tls. Not my smr cls6. The hood is proped up like that because of a manifold spacer
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Old Mar 18, 2011 | 12:53 PM
  #27  
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Thanks for the DIY. I have wanted to do this for some time now.

When I did my system in my truck the guys at best buy wanted to do this with a redtop battery insted of a capacitor on a 800w system. I've had that system for over 7 years without problems. I did just replace the redtop tho
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Old Mar 20, 2011 | 12:17 PM
  #28  
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usually if you wire the amp directly to the battey with a properly sized cable you don't have any issue's, after all the alternator is only capable of outputing 100 amps if it's a high output unit, 70-80 amps is typical even with a 100A rated alternator a 6 gauge wire is more than capable of caring the load, 1 awg wire is a major overkill and should have been ran to the amp and not the alternator.
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Old Mar 21, 2011 | 08:44 PM
  #29  
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where you said "take cover off and unbolt bolt" what was the purpose of unbolting that bolt? how did this upgrade help with the dimming lights? did you notice a huge difference?
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Old Mar 21, 2011 | 09:11 PM
  #30  
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u see the small dim red circle on the harness going to the alt? thats teh bolt im talking about.
lights didnt dim when the bass hit. so i was satisfied
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Old Mar 21, 2011 | 09:13 PM
  #31  
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are you also running a capacitor? or just the big 3?
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Old Mar 21, 2011 | 09:15 PM
  #32  
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what was the reason for removing that bolt? i didnt notice any wire connected to it in any of the pictures. all that i noticed was that black small bracket.
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Old Mar 21, 2011 | 09:37 PM
  #33  
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i had a capacitor but wasnt enough. just a harness that keeps it in place. easier to work around with the bolt removed for the time being
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Old Mar 21, 2011 | 09:39 PM
  #34  
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sorry for all the questions, just trying to figure out the best way to do this. do you still have the capacitor hooked up?
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Old Mar 21, 2011 | 09:48 PM
  #35  
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the car got totaled
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Old Mar 22, 2011 | 06:13 PM
  #36  
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sorry to hear. i guess i worded my question wrong. were you still running the cap after you did the big 3?
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Old Mar 22, 2011 | 06:32 PM
  #37  
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yes
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Old Oct 27, 2011 | 10:38 PM
  #38  
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bring this back from the dead kinda... do you really have to ground the ALT?
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Old Oct 27, 2011 | 11:57 PM
  #39  
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The Alternator ground is the whole Engine + Tranny, You actually ground it with the Tranny Ground BUT To make an even more powerful Ground, Is to Ground the ALT directly to Chasis just like some Hondas do OEM.

You can Not do it, But its soo Easy that its not logical to let it be.
Its like a Double Bonus from doing the Big 3 and its not that difficult really.

Last edited by Skirmich; Oct 28, 2011 at 12:02 AM.
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Old Oct 28, 2011 | 07:38 PM
  #40  
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Can you tell me where to wire in the 8 track input. I want to mount my Motorola from my 68 Chevy. It almost fits in the TLS.
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