alternator help ?

[iROCKtheFOSgate]

yea thats why im adding the xs power d375 in the back but some pplm on here are like over reacting ....

[iROCKtheFOSgate]

and its only a 80 amp alt that i have.....

[Trey_Dog650]

you should be fine. may still experience some drop but its not gonna be life threatening lol

[WastedTalent]

Mine's only life threatening bc that's the popo we're talkin bout. i know 13.3 is a good voltage. but... when your lights dimmin and cops right there? BAD VOLTAGE. BAD!!! lol.

[Wicks]

I like to throw some numbers at questions like this to add some perspective.

At a min voltage of 13.8V, your 80A alt is capable of ~1100W. At 14.4V you'll get maybe 1200W.

Keep in mind your amps are not 100% efficient.

Ex. You have a 1000W amp that's 75% efficient. Therefore it will actually consume ~1300W of input from your car's electrical.

Also keep in mind that your car will consume some of your alternators current as well, especially at night/air conditioning/heater/defrost/etc.

Your stock electrical should be OK but if you start playing some extended high level music then it will start draining your batteries.

Upgrading your alt is always a great idea.

There are a lot of people who complain about their amps/subs/etc... when its actually user error (bad electrical) most of the time.

[iROCKtheFOSgate]

I like to throw some numbers at questions like this to add some perspective.

At a min voltage of 13.8V, your 80A alt is capable of ~1100W. At 14.4V you'll get maybe 1200W.

Keep in mind your amps are not 100% efficient.

Ex. You have a 1000W amp that's 75% efficient. Therefore it will actually consume ~1300W of input from your car's electrical.

Also keep in mind that your car will consume some of your alternators current as well, especially at night/air conditioning/heater/defrost/etc.

Your stock electrical should be OK but if you start playing some extended high level music then it will start draining your batteries.

Upgrading your alt is always a great idea.

There are a lot of people who complain about their amps/subs/etc... when its actually user error (bad electrical) most of the time.

IDK but from rockford its 85.6% @ 4-Ohm and that is what im gonna be running it at and trying to sell my 4awg wires to get 1/0 wires ... is that still a good idea to do ???

[Wicks]

85% is great, less strain on your electrical. I was just throwing out some numbers for example.

The higher your efficiency the better. Less power wasted as heat.

Absolutely, 0ga is a great choice even if its more than you need.

Having extra copper going to your amps is always a good idea.

Plus the thicker wire is already run in case you want to upgrade in the future.

[iROCKtheFOSgate]

what about fuse size ??? i ask

[SnowDrifter]

300a for 0 gauge

[Wicks]

Fuse your power run (0ga) at 300A on the beginning and end of your cable run.

Fuse the amps at that the manuals suggest, right before the amps.

EDIT: Ninja'd by Snow....................