New battery and/or Alternator?

[SaxMan 2]

Ok so I'm planning on getting a SAZ-1000D amp and I just wanted to know if I'm going to need a new battery or new alternator. I think the alternator in the 2007 Jetta is a 140 amp alt. I did some calculations and I think that is more than enough but I don't know shit (the true :'( ). If I don't I was thinking about getting a XS 5200 ( I think that's the battery) And will I need to upgrade my big 3?

[Duran 387]

If you upgrade any of the electrical, you should do the big 3, even if you don't upgrade the electrical it should be done haha. It's better to have more than enough power than not enough, keep that in mind.

[SaxMan 2]

Yeah. I'll probably hook up a volt meter and if I'm at 12 I'll do the upgrade.

[emh9009 199]

even if you're at 13 do it its good for the whole car's electrical, not just the system you have going. bigger wire=less resistance= easier on electronics.

[SaxMan 2]

even if you're at 13 do it its good for the whole car's electrical, not just the system you have going. bigger wire=less resistance= easier on electronics.

OK.

[BanginGMC 23]

My head unit use to turn off then on at stop signs and red lights.. did the big three and all fixed so do that shiittt!

[Jay-C76 333]

Big 3 for sure.....

If you're lights are dimming and the engine run rough, beef that alternator up.

Adding extra batteries on a stock alt will strain the alt and eventually burn it up.

Alternators maintain the batteries they aren't for charging the batteries. (which puts strain on the internals of the alt.)

Plus too big of wire on small current is just as bad as too small of a wire on big current.

although going too big is a further shot than having a wire that's too small.

[akrod2as 2]

Big 3 for sure.....

If you're lights are dimming and the engine run rough, beef that alternator up.

Adding extra batteries on a stock alt will strain the alt and eventually burn it up.

Alternators maintain the batteries they aren't for charging the batteries. (which puts strain on the internals of the alt.)

Plus too big of wire on small current is just as bad as too small of a wire on big current.

although going too big is a further shot than having a wire that's too small.

wat?

[Jay-C76 333]

huh?

too big of a wire on a small current isn't good either.....

I had it explained to me by an electrician.

It's kinda hard to do in a car but it is possible.

For each foot a current has to travel there is some loss.

Since most of the current is surface current which travels

actually on the outer part of the copper, too much surface area

can cause great loss depending on the size of the wire and

the current applied to the start end of the wire.

[akrod2as 2]

huh?

Look at what I bolded. Care to elaborate?

[Jay-C76 333]

I edited...sorry I'm a slow typer ...LOL

[SaxMan 2]

Would a dmm help tell me what my alt. is rated at? Like what setting?