Big 3 help | Ford Escort Owners Association (FEOA)
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Big 3 help

Discussion in 'ICE (In Car Entertainment)' started by 99sportscort, Nov 1, 2010.

  1. 99sportscort

    99sportscort New Member

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    I plan on doing the big 3 wiring on my 99 spi. I've read i can replace the wiring or just add larger wiring to the factory, what do you guys suggest? Also how would i go about upgrading my ground? i'd swear i read on here some where that one of the grounds cant be upgraded, true? any other help/suggestions is appreciated! thanks
  2. neuspeedescort

    neuspeedescort Moderator Staff Member

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    everything can be upgraded. just remember to fuse between the alternator and the battery.


    NEUMAN
  3. racethisescort89

    racethisescort89 New Member

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    if i may ask the noob question..whats the big 3?
  4. 99sportscort

    99sportscort New Member

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    so is it ok to just add to my wiring instead of tearing it all out? and yes i have a 200 amp fuse. The big 3 to me (may be using the term incorrectly) is upgrading your alternator to battery +, battery to chassis-, and engine to chassis- to larger wire to allow more current flow.
  5. neuspeedescort

    neuspeedescort Moderator Staff Member

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    a-hole response: you know who i want you to ask this of don't you?

    friendly response: it is the upgrading of the power and ground lines to (most commonly) 0ga wire.
    1. alternator to battery
    2. battery ground
    3. engien/alt ground


    NEUMAN
  6. racethisescort89

    racethisescort89 New Member

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    Well thank you for your kinda words and generosity Neuman I just had never heard of it phrased that way before
  7. neuspeedescort

    neuspeedescort Moderator Staff Member

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    im just getting at you. when i heard the term for the first time i was like the wha? but anywyas. where has 4door been?


    NEUMAN
  8. 99sportscort

    99sportscort New Member

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    Alternator to battery i understand, little help with the grounds? One wire leaving my negative battery post instantly goes into a black plastic thing and splits into 2 wires then goes off into a big main loom. The other wire from my negative terminal has a yellow strip on it. it goes for 5 inches is grounded to the body and then continues down under my battery and into a large loom also.
    So how do i upgrade these? sorry to be such a noob.. all the pictures i look at people just have 2 big 0/1guage wiring running from their battery ground to the chassis and one to the engine(and the postitve to alternator). so what do i do with the wire that splits right away? and can i just swap out that 5 inches to the chassis and leave and rest that goes on into the loom alone? Thanks for the helps guys!
    Also i just recieved my h/o alternator (thats why im doing the big 3) and it has a smaller pulley by half an inch, will i require a smaller belt?
  9. neuspeedescort

    neuspeedescort Moderator Staff Member

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    the negative of the battery should only have one wire. the power is the side that has multiple.

    you need to ground your engine to the chassis also. that is 3


    NEUMAN
  10. 4doorscort

    4doorscort New Member

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    deffintly go with 0 gauge, nothing smaller then 4 gauge otherwise your wasting your time imo.

    And I'm around Neuman ;)
  11. racethisescort89

    racethisescort89 New Member

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    lmfao why did you ask for 4door Neuman? miss him?
  12. neuspeedescort

    neuspeedescort Moderator Staff Member

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    part of my likes him. LOL

    he is dead on tho. i built a harness upgrade back a few years ago for my copper car that is high count 100% ofc 8ga to replace all the stock power and ground. that was before i decided to put a larger stereo in. now i have a harness that is really nice but a waste. i may redo it or sell it to a race car person.


    NEUMAN
  13. ESCORT_me

    ESCORT_me New Member

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    if you google "big three" you will get a better idea than other peoples opinions here...and dont use "gauge" use "awg" american wire gauge its bigger and better quality then "guage" wire and if you got the few extra bux get marine awg(ebay gots it hella cheap 1+ by the foot)...all the cheap wire boast "gauge" when infact you find "awg" on real power wire(im using american made 2 "awg" monster COMP. wire through out my 99 se i also done the "big three" but used 0 marine awg for big 3 under my hood)...DONT BUY "GAUGE" BUY "AWG" WIRE!!!! way better current draw and safer for your CAR electronix!...
  14. pnmred

    pnmred FEOA Member

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    he's right AWG is standardized
  15. racethisescort89

    racethisescort89 New Member

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    im actually thinking of upgrading to 4GA now i say at my local parts store battery terminals with wire 4GA for 12$ would JUST battery wiring being larger have an effect?
  16. ESCORT_me

    ESCORT_me New Member

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    get a deep cycle battery if you want more "effect" :)
  17. neuspeedescort

    neuspeedescort Moderator Staff Member

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    i don't know of a lot of automotive style power wire that is marked AWG.

    now marine wire may be the same but if you want the good stuff get welding cable. very high strand count OFC large diameter and fine strands also. top shelf in my book. but not many people around here (including myself) really need it. however if your going huge its a must. that or some double-0.

    so the marine wire your rocking is it the tinned stuff?


    NEUMAN
  18. racethisescort89

    racethisescort89 New Member

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    see i say AWG cuz thats the only wire guide im aware of lol
  19. pnmred

    pnmred FEOA Member

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    A standard battery would have more total surface area on its plates when compared to a deep cycle battery of equal size. This extra surface area provides more area for the chemical reaction to take place and therefore produce a higher output current
  20. neuspeedescort

    neuspeedescort Moderator Staff Member

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    oh really? look into a stock battery for an escort. its going to be 450-600 cca. a deep cycle is 800-1000 cca.


    NEUMAN

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