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Reload Thread: Will a High Output Alternator Fry my car's Electrical System?

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    Re: Will a High Output Alternator Fry my car's Electrical System?

    Simple version The principle states that when a fluid flowing through a tube reaches a constriction or narrowing of the tube, the speed of the fluid passing through the constriction is increased and its pressure decreased.


    What this has to do with HO Alts I dont know................







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    Re: Will a High Output Alternator Fry my car's Electrical System?

    Look at the date



    Quote Originally Posted by Scoobydoo View Post
    Before poking fun at others at least learn to spell. I won't go into all the gammar mistakes!
    Irony?

    Quote Originally Posted by audioholic View Post
    Your sig... Im trying to figure out if you think he spelled grammar wrong. Because, he didn't. Irony indeed.

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    Re: Will a High Output Alternator Fry my car's Electrical System?

    nevermind
    Last edited by ameduece; 11-24-2004 at 11:56 PM.




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    Re: Will a High Output Alternator Fry my car's Electrical System?

    You seem pretty knowlegdeable, What would a jl12w7 3ohm subwooffer run a 4ohm amp at. I mean will i have enough power. I have a Lazar 268 bridged 2000 watts. It was bench tested at 930watts.




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    Re: Will a High Output Alternator Fry my car's Electrical System?

    Quote Originally Posted by Bumpin' Yota
    Mods, could we sticky this?


    If properly used, no.

    I've heard many people (including some mechanics) run off at the mouth about how getting a HO alternator will fry all the wires and destroy your car's electrical system and blow every bulb in your car...

    Nothing could be further from the case.

    If the proper alternator is selected, installed and operating properly, it will charge up to about 16.0v at the absolute most when cold. Typically after warm up, it will charge everything at 14.4v. On REALLY hot days, it may drop its voltage to 13.8v.

    Nothing in your car will be stressed. It is the nature of a generator (alternator) to only supply enough current as is needed, so usually it's just trickle charging the batteries and up keeping the car's electronics.... This is the case for a stock honda 40amp alt or a 350ampre big case custom alternator.

    Part of a PROPER install is ensuring the alternator has a sufficient size wire to the battery. If you have more than 150amp alt, I would highly suggest using nothing smaller than 1/0ga to connect the battery and alt.

    If you were to use, say, 8ga as a charging wire to the battery when using a 350amp alt, and you suddenly need that 350amps the alt can kick out, you WILL fry that single 8ga wire....

    Most alternators come with an internal voltage regulator that keeps the alternator's charging voltage from 13.8-15.5v at all times. Others have external units that allow you to change the voltage the alt charges to.

    Voltage is a different beast than current.

    Too much current over a small wire will overheat it VERY rapidly and possibly induce failure. However it is VERY difficult to overload a wire with voltage. I'd place a good bet that most of you underhood wires can conduct 500+ volts without much trouble. (Your sparkplug wires carry 10,000volts if I remember correctly, but very LITTLE current...)

    The electronics in your car, on the other hand, are sensitive to both current AND voltage. Spikes above 18vdc could very well destroy your car's ECU, bulbs, etc. Current is not an issue as the electronics will only see as much current as they need.


    Now to the FOLKLORE/Wive's tales....

    I would venture that in the past people saw Racing Alternators and tried to use them in their own cars. Racing units produce a LOT more voltage than normal. (Typically they use 16v.) So most of those alts will charge at 18-21volts DC and that high of a voltage WILL incinerate most of your car's electronics. I believe this is were that folklore began, and is why I said you must select the proper unit for your car.

    I've heard the analogies too....

    "A HOalt is like a firehose where as your stock alt is a sink facuet. If your faucet had the pressure of a fire hose it would punch a hole in your sink."

    Another falsehood, first off the pressure in a firehose and your sink are equal or very close - there is a reason you use schedule 40 PVC or better in your house. The difference is the VOLUME of water being propelled.

    Secondarily an alt will only produce enough current as is needed. And if it does go to full power, that current will ONLY go to the electronics that are demanding that much current. So you anticipate where this current is going to go, and beef up those wires. (Big 3 wires, and power wires for your amps.)



    This is why a HOalt is COMPLETELY safe for your vehicle.

    And I HIGHLY recommend, and use, www.hoalternators.com
    The best example i can come up with is this: Say you get your water from the town to your house. The towns water is usually stored in a huge water tower. It has lots and lots of water, you turn your facuet on and only get a stream, you dont get flooded, thats because your house may only have a 1 inch line. Its basically the same for a high output alternator. Having the extra amps wont hurt your electrical system. Its better to have the extra amps!!!!




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    Re: Will a High Output Alternator Fry my car's Electrical System?

    That was the weirdest thread I have ever read in my life, went from HO Alts to bernoulli's law. It would have been easier to say that it would work and there wouldm't be any problems with frying any electical parts.




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    Re: Will a High Output Alternator Fry my car's Electrical System?

    Back to HO alts. If you have a HO alt, and you have two bats, wont they draw more power, until they are charged again, or will they just charge at a slow rate?



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    Re: Will a High Output Alternator Fry my car's Electrical System?

    Quote Originally Posted by qtipextra
    Back to HO alts. If you have a HO alt, and you have two bats, wont they draw more power, until they are charged again, or will they just charge at a slow rate?
    depends on how you have them setup and what you are using each one for.

    If you have an isolator between the two (one for car audio and one for the car) the alt will charge each as it is depleted and maintain a constant float charge in each.




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    Re: Will a High Output Alternator Fry my car's Electrical System?

    how do and how can i wire a second alt to my car




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    Re: Will a High Output Alternator Fry my car's Electrical System?

    anyone




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    Re: Will a High Output Alternator Fry my car's Electrical System?

    go away dude, you need to never touch car audio again.

    pay some one to do it for you.




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    Re: Will a High Output Alternator Fry my car's Electrical System?

    Supraman 1379 how big is your altenator I'm not sure how big to go im going to be buuying a KAC-9152D for my 2 P315D4's and i already have a 200 watt 2 channel amp for my rear highs and a 1.5 farad cap. So I just want to get a altenator just big enough to do the job.




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    Re: Will a High Output Alternator Fry my car's Electrical System?

    all i have to say is that alternators can and will fry your car.. i had a brand new chrsyler 300M just put 2 JL 13W7, and 2 JL 1000/1, and a JL 300/4 in there had a HO alternator put in was a 200amp.. have a 1/0 gauge from the alterator to the battery... and this is what happened to my car when i got two miles down the road after having all the work done....






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    Re: Will a High Output Alternator Fry my car's Electrical System?

    where did the alt come from?






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    Re: Will a High Output Alternator Fry my car's Electrical System?

    Quote Originally Posted by loudsts
    all i have to say is that alternators can and will fry your car.. i had a brand new chrsyler 300M just put 2 JL 13W7, and 2 JL 1000/1, and a JL 300/4 in there had a HO alternator put in was a 200amp.. have a 1/0 gauge from the alterator to the battery... and this is what happened to my car when i got two miles down the road after having all the work done....



    WTF HAPPENED?




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