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Reload Thread: Likelihood of my Alt Handling a Heavy Load

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    Likelihood of my Alt Handling a Heavy Load

    So right now I run ~600-800W RMS, but how much more draw would I see running 1200RMS? I have my stock 100A alternator and it seems to handle it right now without a hitch. I do have a decent sized battery (non stock, about 1100ish Amps). Would pushing 1200RMS be too much for my alt to handle?







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    Re: Likelihood of my Alt Handling a Heavy Load

    Depends, you talking about a class D amp? Will probably be fine. Years ago when you were trying to get 1000+ watts out of a class A amp it really did pull a lot of current but your probably talking about maybe 60-70 amps of draw at peak. Most of the time will only be a fraction of that.

    Just make sure to use the proper gauge wire and ground everything properly.




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    Re: Likelihood of my Alt Handling a Heavy Load

    Yes its Class D. I figured it would be fine, I just wanted to get opinions before I dropped $130 a piece on 2 subs and 200ish or more on a box.




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    Re: Likelihood of my Alt Handling a Heavy Load

    It all depends on the situation, man. What vehicle is it in? Personally, my Grand Prix's stock alt handled that kind of a load fine; but it's got a bigger stock alternator than most vehicles.





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    Re: Likelihood of my Alt Handling a Heavy Load

    my gxp has a 145 amp in it, no idea where it came from but apparently it was from a truck of some sort. previous owner put it in. tested 140 though. Seems to stand up fine on shark 2k at 1 ohm with about a volt drop. Now to drop the saz 2500 in and see what happens.

    op, have you done big three yet?



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    Re: Likelihood of my Alt Handling a Heavy Load

    It is a Toyota Tundra 2000 with a towing package, so I know it has a 100Amp Alternator. I have not done the big 3 since it is quite expensive and I am in college working a campus job 8 hours a week haha. My battery is fine, as I stated earlier its higher output than most regular batteries. If I come across some money I planned on going with an 180Amp DC Power and Engineering alt and getting 0 gauge Knu Konceptz wire to add on to the wiring. I have a 3 Farad Cap hooked up and according to it when I am pounding to the max I might drop .8-1V on really intense parts, but the cap reaches full capacity again in just a second or two.




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    Re: Likelihood of my Alt Handling a Heavy Load

    the big three is the one of the cheapest and easiest upgrades you can do. Ditch the cap its just going to strain the system more. And generally the voltage at your amp is about a volt less. so keep that in mind



    05 gxp
    7.5 cube box tuned to 34htz
    Sundown audio sa-15's
    Sundown 2500v2
    Big Three in 2/0
    All wire klmx 2/0
    Xs power xp2500
    Tm dual inputs

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    Re: Likelihood of my Alt Handling a Heavy Load

    Sell the cap and use the money from that to get a Big 3 kit. You won't regret it.



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    Re: Likelihood of my Alt Handling a Heavy Load

    Quote Originally Posted by jteske88 View Post
    the big three is the one of the cheapest and easiest upgrades you can do. Ditch the cap its just going to strain the system more. And generally the voltage at your amp is about a volt less. so keep that in mind
    Cheap? What kind of HO alternators are cheap?




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    Re: Likelihood of my Alt Handling a Heavy Load

    oh sorry lol the way you worded it sounded like the big three was pricey lol you dont need a alt to do big three.



    05 gxp
    7.5 cube box tuned to 34htz
    Sundown audio sa-15's
    Sundown 2500v2
    Big Three in 2/0
    All wire klmx 2/0
    Xs power xp2500
    Tm dual inputs

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    Re: Likelihood of my Alt Handling a Heavy Load

    My 90 amp alt couldn't keep up with less than 800 watts.



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    Re: Likelihood of my Alt Handling a Heavy Load

    **** that *****, must be wiring. I've seen less do more.



    05 gxp
    7.5 cube box tuned to 34htz
    Sundown audio sa-15's
    Sundown 2500v2
    Big Three in 2/0
    All wire klmx 2/0
    Xs power xp2500
    Tm dual inputs

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    Re: Likelihood of my Alt Handling a Heavy Load

    Quote Originally Posted by jteske88 View Post
    oh sorry lol the way you worded it sounded like the big three was pricey lol you dont need a alt to do big three.
    DOesn't the Big 3 Include an Alternator? Battery, Wiring, Alt?




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    Re: Likelihood of my Alt Handling a Heavy Load

    No, it is a supplemental wiring of your power and ground between engine block, frame and alt. some vendors on here sell pre-cut kits, mylows10, and others can help you out.




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    Re: Likelihood of my Alt Handling a Heavy Load

    pretty simple really -

    your alternators job is just to keep the battery at a steady voltage, if your battery is weak then that alternator is already working overtime to keep it charged as is, then adding more of a load I/e and amp is of course going to create a voltage drop.

    In a normal heathly system with proper gauge wiring and well done connections, having an occasional 60 amp draw over stock isn't going to hurt it. Considering on average most cars probably pull 20-30 amps stock, theres enough headroom to pull more, you really have to be pushing a system hard to be pushing beyond the charging limit.

    I would say once you go beyond a simple sub amp + 4ch, and get to the point where your max current draw is over 100amps, it may be time to consider an alternator. Calling it a certain # of watts wouldn't be accurate enough, since wattage claims vs. current draw are vastly different.




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