What all is needed when upgrading to a high output alternator? Please help!

[SoCaL081]

Hey guys and that random girl,

 

I am getting ready to upgrade my electrical system in my 05 Jeep Grand Cherokee Larado 3.7L v6, already have the big 4 done with 4ga ofc but I am upgrading the alternator to a high output alternator so I plan on redoing those cables with 1/0 but besides that...What all is needed when upgrading to a high output alternator? Am I going to need anything else such as a regulator, etc? If so, what exactly? Right now I am using a Sony MEX-XB100BT headunit, (2) sets of Alpine Type-S Components front & rear, powered by a Memphis (16-MRA4.480) 4ch amp running around 400w @ 4ohms, and a Stinger MT-1500.1 amp to power my 15" Eclipse Titanium (SW9152DVC) subwoofer running around 1000w @ 2ohms. Do you guys think a 240a alternator will do just fine for my setup? The stock alternator is a whole 130a. Hopefully I gave enough info for someone to give me some insight into what I need to get. Again, all cables will be replaced with 1/0 ofc as well. Thanks for taking the time to hear me out.

 

Jon

[audiofanaticz]

Unless you're buying an externally regulated alternator you will not need a regulator. I also don't suggest running an externally regulated alternator anyways since mostly only people in competition that need 16-18volt charging systems use them, and not everyday daily drivers.

Really all you need is said high output alternator, upgrade your cables like you said with 1/0 gauge, and typically a shorter serpentine belt that is about 1/2 inch shorter (sometimes 1 inch shorter). The length of the built really depends on where your belt tensioner rests with the oem alt and where it changes too with the high output alt that has a smaller pulley. So it maybe a good idea to mark it with a sharpie so you can see the difference. If your belt is too long then your tensioner will not properly tension under certain loads causing for a loose belt and belt slip.