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    Stillmatic22's Avatar
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    HO alt installed, voltage not high enough

    Sup guys, so saturday I finally got around to installing my new ALT from alterstart. Installation went perfect, then I decide to check my voltage with a DMM with the car running. At idle i'm at around 12.2-12.9. When I rev it (mind you I can rev to 9000+ rpms) the highest my voltage will go according to the DMM is 14.1...what gives?

    The spec sheet that I received with the alt shows the voltage regulator was set at 14.447. So why does it not show such on the DMM.

    RECAP. Installed alt, having same problems as before (lets say the amp was tested at 14.4) with HO alt regulator set at 14.447 when reved does not go over 14.1. It doesn't even feel as if I have a HO alt.

    Please help, thanks in advance



    07 MRP Acura TL-S

    HU- Stock
    Front- Image Dynamics XS65 Comps
    Rear- Focal Polyglass 165CVX Coax's
    Sub- ?
    Amp- JL Audio HD900/5




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    94CamryBumpin's Avatar
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    Re: HO alt installed, voltage not high enough

    maybe the alt wasn't big enough to make a diff?




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    Re: HO alt installed, voltage not high enough

    Just my thoughts, your new alternator is for H.O CURRENT(amps) not necessarily VOLTAGE(volts). The voltage may read 14.1 but your amperage output should be higher now.



    Doug Blohm
    Team Southern Bass

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    Re: HO alt installed, voltage not high enough

    yea its only a 150a...




    1998 Acura TL 3.2L
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    Re: HO alt installed, voltage not high enough

    ahh k, assuming my amp was tested at 14.4, what could I possibly do to raise my voltage so my amp will run at it's optimal state. The problem i'm having is at low volume (1-10) the sound is clear and crisp. Once I turn up the volume lets day 23-25, it's muffled like the treble n' bass aren't crisp anymore kinda muffled like. I don't even turn it up past that really. This is what makes me think that I'm getting volatge drop. Any opinions on what to check for, or what the above may be symtoms of?

    Thanks again



    07 MRP Acura TL-S

    HU- Stock
    Front- Image Dynamics XS65 Comps
    Rear- Focal Polyglass 165CVX Coax's
    Sub- ?
    Amp- JL Audio HD900/5

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    Mr. Opportunist's Avatar
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    Re: HO alt installed, voltage not high enough

    wouldnt voltage drop result in subs playing quiter then they should?




    Quote Originally Posted by the12voltsux View Post
    You low voltage may be due to having three batteries. have you tried only using one battery?

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    Moe Lester's Avatar
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    Re: HO alt installed, voltage not high enough

    it probably puts out 14.447 volts with NO load on it




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    Re: HO alt installed, voltage not high enough

    Quote Originally Posted by Stillmatic22
    ahh k, assuming my amp was tested at 14.4, what could I possibly do to raise my voltage so my amp will run at it's optimal state. The problem i'm having is at low volume (1-10) the sound is clear and crisp. Once I turn up the volume lets day 23-25, it's muffled like the treble n' bass aren't crisp anymore kinda muffled like. I don't even turn it up past that really. This is what makes me think that I'm getting volatge drop. Any opinions on what to check for, or what the above may be symtoms of?

    Thanks again
    Is it DISTORTION you're hearing??? Check crossover freq. to the CDT's. Then check to see if the HU outputs are over modulating. IF the HU has built-in amps, even if you aren't using them, anything over about 70% volume will distort to some degree.
    First, turn down the gains all the way. Turn your volume knob to the 23-25(no more than 70%) range again. Listen for the muffled noise. If you hear it with the gains all the way down, you are most likely sending a distorted signal to the amps. If it's clean, find a DMM and set your gains properly using that. The amp input signal was being overdriven.

    That outta get you started anyway.



    Doug Blohm
    Team Southern Bass

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    Re: HO alt installed, voltage not high enough

    ThanX "deejuh" will give it a shot



    07 MRP Acura TL-S

    HU- Stock
    Front- Image Dynamics XS65 Comps
    Rear- Focal Polyglass 165CVX Coax's
    Sub- ?
    Amp- JL Audio HD900/5

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