Upgrade the factory 110amp alternator

[WHOISMOOTOO]

Looking for suggestions on upgrading my alternator, i've looked on ebay and seen 220 amp but that seems like a huge jump from 110amp, im looking to beef it up because i have a system and im tired of my lights dimming when the bass hits and when i put up my windows.

 

[tonydiv]

http://www.wranglernw.com/pc-6363-8...d-expedition-lincoln-navigator-1997-2006.aspx

This may help out more than a new alt.

Just ordered mine today.

 

[WHOISMOOTOO]

Im kind of familiar with battery isolators, im just not sure the stock alt will be able to charge both baterys because its not keeping up with the power demand now, but i will need to order that kit in the future when i buy a new alternator, i just have to find out if 220amps is too much for the charging system or not

 

[tonydiv]

The idea would be to run the sound system off of the aux battery and leave the stock battery to run the rest of vehicle systems. The isolator would keep both batteries charged. That way the loads are separate.

Also a 110 amp alt is plenty to charge both batteries. The output cable on the back of a 220 amp alt would need to be at least 4ga, although 1ga (or larger)would be better.

 

[WHOISMOOTOO]

thats awesome!! i didnt want to pay like $200 for an alternator then another $200 for the second battery and isolator kit just to make my lights not dim lol!
but there are isolators on ebay for like $20 scosche (the damn wiring harness brand) all you would need ot supply is the battery and cables

 

[trdragons44]

i was just wonderin i replaced my alt(97 eb 5.4) about 10 months ago and ever since i have had a whine at idle. i was wondering if a new battery would get rid of it. i charged the battery to 100% when i changed the alt out. Should i replace the battery it was bought in 03 by my uncle who had it previously to me.

 

[tonydiv]

Is the whine coming from the alt itself or is it coming over the speakers?

 

[Bow Down]

Im kind of familiar with battery isolators, im just not sure the stock alt will be able to charge both baterys because its not keeping up with the power demand now, but i will need to order that kit in the future when i buy a new alternator, i just have to find out if 220amps is too much for the charging system or not

Did you add a cap to your system?? Adding a cap to bass amp, will store power so when your subs hit the lights won't dim. In other words the the bass amp is taking the power from the cap not the battery during heavy bass.

 

[hardrock]

You could also try the "big 3" upgrade.

1/0 ground battery to chassis
1/0 ground battery to engine
1/0 hot battery to alternator (fused)

 

[WHOISMOOTOO]

i think im just going to do the isolator circut so i can leave the charging system stock and just add a battery for my amp