Upgrading alternator

[mazzasec 5,000+ posts]

Well currently I am running 2 Sundown 1500ds kinetik HC1400 under the hood and HC2400 in the rear. Stock 105 or 130 amp alt (im not sure). My volts drop to about 11.8 . What kinda drops can I suspect off a 300 amp alternator with the same 2 batteries? So basically same setup just instead of stock 105 amp having a 300 amp alt. Thanks!

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[Linkz 10+ year member]

You should stay around 14 volts with all of those batteries and almost 3x the alternator power

 

[DDSC 10+ year member]

yea but his idle amperes will probably be low