Question reguarding the amount of Amperes

[Mindspin311 10+ year member]

Ok so the stock alt on my blazer is only 90A, WTF was Chevy thinking??? Anyways I've done some research and realized that with my 2-ch Kenwood and my RE35-1D both running that they will pull in total 90 amperes from my alt!!!!!!!!! Fawk!!!!! That means there will be no juice left over for the rest of m car. So my question is, if I were to upgrade my alt somehow, what would be a good number of Amperes to have at my disposal to allow for the rest of my car to get the power it needs. I was told I should have atleast 20a left over after figuring in the power draw from my amps.

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[Gauntlet 5,000+ posts]

Originally posted by Mindspin311 Ok so the stock alt on my blazer is only 90A, WTF was Chevy thinking??? Anyways I've done some research and realized that with my 2-ch Kenwood and my RE35-1D both running that they will pull in total 90 amperes from my alt!!!!!!!!! Fawk!!!!! That means there will be no juice left over for the rest of m car. So my question is, if I were to upgrade my alt somehow, what would be a good number of Amperes to have at my disposal to allow for the rest of my car to get the power it needs. I was told I should have atleast 20a left over after figuring in the power draw from my amps.

I'd say get it rewound to at least 125....