Wire gauge from 270-amp alternator to rear-mounted master switch?

[marsh2o]

Because I'm setting up my GT500 is dual use street and track car (with a sound system and dual fan heat exchanger), I've got a Nation's 270-amp alternator and am wondering how the output of the alternator impacts the wire gauge I need to run from the alternator to the master switch at the back of the car. When the battery is located in its stock position in the engine compartment, Nation recommends a 2 AWG wire to the battery. But do I need to change this with my master switch and rear-mounted battery? Any advice would be much appreciated. Thanks!

 

[xr7]

Because I'm setting up my GT500 is dual use street and track car (with a sound system and dual fan heat exchanger), I've got a Nation's 270-amp alternator and am wondering how the output of the alternator impacts the wire gauge I need to run from the alternator to the master switch at the back of the car. When the battery is located in its stock position in the engine compartment, Nation recommends a 2 AWG wire to the battery. But do I need to change this with my master switch and rear-mounted battery? Any advice would be much appreciated. Thanks!

Ideally you need to know the length of the runs and what the amp load is, lastly the wiring diagram. Long 12v runs with big amp loads need BIG cables.

 

[marsh2o]

Ideally you need to know the length of the runs and what the amp load is, lastly the wiring diagram. Long 12v runs with big amp loads need BIG cables.

The three additional loads above stock are: 80 amps for the twin 11" SPAL fans on the heat exchanger, 80 amps for the dual VMP fuel pump boosters, and 50 amps for the sound system -- so a total of 210 amps. A tentative schematic of the wiring -- including gauge and length -- is included below. However, I am not an electrician, so this may well need revision. All suggestions welcome.