Amplifier pulling amps

[plbpatw]

Does anyone know how big of an altenator you ned to upgrade to in order to run you normal car requirements and then 4 rockford fosgate 800.2 from 2002? I remember seeing something in a magazine sometime but do not remember the recommendations. Thanks to any help.

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[JimJ 5,000+ posts]

Well, what size alt do you have stock?

 

[plbpatw]

95 I believe. Was wondering if a 105 would be overdoing it or if something around 150-170 would work.