im looking to do the Big 3 upgrade this week
i was just wondering who has done it
and can you give me some tips
what exactly are the big 3
i cant quite remember
i remember its the ground from the engine block
and the power wire from the alternator,
but what is the last thing im missing.
and if possible do you have any pics
thanks

 

Reground the battery to chassis.

 

Battery + to Altenator +
Battery - to Block
Battery - to firewall
Chassis to Block

Some people also do
Battery - to chassis

I'm doing the Big 3 this weekend, I'll try to take some pics. Also check out this thread:
Big 3

 

1. Battery positive to alternator positive (FUSE this wire with a fuse that matches the capacity of your wire. So if your using like 1/0 wire, use a 300-350 amp fuse)

2. Engine block to frame. This is really your alternators ground...the alt. is grounded to the engine block through its mouting bolts, so you can find a place where the engine block and frame are close together to save some wire, or else hook your wire to the alternator mounting brackets, then to the frame.

3. Battery negative to frame.

 

what exactly are the benifits of doing this?
Scott

 

The larger wire creates less resistance in your electrical system.

Your electical system has to make a complete circuit, from your battery/alternator, to the device (amps in this case) and back to the battery. If you have something like 1/0 gauge going to your amp, then for your ground, then this little dinky factory 8 gauge wire going from your frame to the battery, that 8 gauge is a bottle neck. It can create voltage drops which will result in dimming lights and other things.

The larger wire opens up that bottleneck so to say.

Trying to describe it in laymans terms

 

thanks for explaining that, i understand it now all right, and the ideas of how the smaller wire can create the bottle neck i guess i just never really thought it through like that, makes sense now though,
Scott