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Help with The Big Three

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RazoR353 posted on Thu, Jul 2 2009 2:37 PM

Hello everyone

 

I drive a 2003 Chrysler Sebring Convertible and I have a question about one wire from the big three upgrade.  My car has the battery hidden somewhere in the front bumper, and to access it, is a lot of pain. My two amplifiers run off the positive jumpstart cable. Will it harm my car or be inefficient if I conect the alternator-battery wire to the positive jumpstart cable (where my two amps are connected) or I must connect it to the battery?

Thank you.

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Verified by TigerHeli

Making your connections directly to the battery (both alt+ and chassis ground) will give you the most benefit, especially if you are trying to upgrade to 1/0 gauge wire.

As long as the current connections to the battery are not the limiting factor (smaller gauge wire than the upgrade big 3 wire) then you should be fine. If they are, then I would spend the time to do it right the first time.

02 BMW 330Ci, Alpine DVI-9965, Alpine MRA F350 5ch, Alpine MRP T220 + 2x Kicker 6x9 FreeAir, Kicker KX1200.1 + Alpine 12" Type-R, 2-Way Security, Keyless Entry, Remote Start

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Top 10 Contributor
773 Posts
Points 17,031
Moderator
Verified by TigerHeli

Making your connections directly to the battery (both alt+ and chassis ground) will give you the most benefit, especially if you are trying to upgrade to 1/0 gauge wire.

As long as the current connections to the battery are not the limiting factor (smaller gauge wire than the upgrade big 3 wire) then you should be fine. If they are, then I would spend the time to do it right the first time.

02 BMW 330Ci, Alpine DVI-9965, Alpine MRA F350 5ch, Alpine MRP T220 + 2x Kicker 6x9 FreeAir, Kicker KX1200.1 + Alpine 12" Type-R, 2-Way Security, Keyless Entry, Remote Start

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Agreed, and depending on the gauge of wire from the battery to the jumpstart connection, you might be shooting yourself in the foot already.

Minor thread hi-jack here, but I have a Big 3 question myself:

The big 3 is:

  • Alternator to Battery Postive.
  • Alternator GND or Engine block to body ground
  • Battery Negative to body GND.

Shouldn't there really be a big 4:

  • Battery Negative to Engine/Alternator GND.

In theory, I think the negative wire to the starter does this and the battery to frame and frame to engine does the same thing - but it seems like the above would/could be desirable.

Thanks!

2002 Ford Focus Sony CDX-GT410u Sony XT-100HD HD Tuner Stock speakers, no amp, no subs

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Thanks everyone, my lights aren't dimming anymore.

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