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Electrical Alternator Advice
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<blockquote data-quote="HardofWhoring" data-source="post: 8831783" data-attributes="member: 674149"><p>Your "weakest point" in that is the alternator. Your stock alternator would have been good enough to run the vehicle. Fuel injection, ecu, headlights, brakelights, turns, AC, fans, all use something. If you have something made in the last 20 years you probably use 30- about 100 amps when everything is maxed, (and the new stuff with heated seats, devices plugged in, entertainment screens you are more than that). Your stock alternator will give you an idea of what they expected you to max out with a little cushion. Subtract that from your new alt, and it will give you an idea of how much you can throw at the amp without worry. </p><p></p><p>If it's 100 amp difference, then 100amps x 14.4volts = 1440 watts. You then plan for an amp being about 85% efficient so 1440 x .85 = 1224 watts is about the limit of what you want your amps to power.</p><p></p><p> Depending on what you have planned, your cable and battery will be good for 3 times that. If you could find what I would think would be about a 350 amp alt, (guessing, - 80 amps for your vehicle), then you're at about 270 amps (x14.4v = 3888watts x .85), and then you would be able to add about 3300 amplifier wattage (3304.8 watts) to your setup without worrying about it, or upgrading further.</p></blockquote><p></p>
[QUOTE="HardofWhoring, post: 8831783, member: 674149"] Your "weakest point" in that is the alternator. Your stock alternator would have been good enough to run the vehicle. Fuel injection, ecu, headlights, brakelights, turns, AC, fans, all use something. If you have something made in the last 20 years you probably use 30- about 100 amps when everything is maxed, (and the new stuff with heated seats, devices plugged in, entertainment screens you are more than that). Your stock alternator will give you an idea of what they expected you to max out with a little cushion. Subtract that from your new alt, and it will give you an idea of how much you can throw at the amp without worry. If it's 100 amp difference, then 100amps x 14.4volts = 1440 watts. You then plan for an amp being about 85% efficient so 1440 x .85 = 1224 watts is about the limit of what you want your amps to power. Depending on what you have planned, your cable and battery will be good for 3 times that. If you could find what I would think would be about a 350 amp alt, (guessing, - 80 amps for your vehicle), then you're at about 270 amps (x14.4v = 3888watts x .85), and then you would be able to add about 3300 amplifier wattage (3304.8 watts) to your setup without worrying about it, or upgrading further. [/QUOTE]
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