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Reload Thread: to get alternator or not?

  1. #1
    chrisw91's Avatar
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    to get alternator or not?

    well, i got my second battery the other day only to be very dissapointed... have these two Interstate Mega-Tron Plus MTP-65 Automotive Battery 850 CCA and SHURiKEN SK-BT45 (SKBT45) 1250 Watt 12V Car Battery Power Cell everything wired with 1/0 including the BIG 3. running about 1800 watts with 2 vvx 12's and a 4 channel (75x4). after putting the second battery in, the voltage still drops! the second battery slowed the drop down a little bit, but was expecting it to be a lot more noticeable increase. so the last thing is my 90 amp alt. i can get a 120 amp for just over $100... will that help out a decent amount? any opinions would help



    1991 dodge ram 2500 standard cab
    hu- kenwood kdc-mp438u
    front- polk momo's 6x9's
    back- diamond audio tweets
    sub- 4 RE8's in sealed enclosure wired to 2 ohms
    sub amp- memphis prd.1000
    6x9's amp- rf 250a2
    everything deadened w/raamat (besides floor and roof)

    refs: civicman07(3), probmxstyle, Slammed, us3, teen,KevinWS6,1985-stang, fo0manchu
    traded: 4OZGLOVES




  2. #2
    mylows10's Avatar
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    Re: to get alternator or not?

    prolly not much since its only 30 amps more.what kind of car /truck ?




    pioneer avhx 5500 dvd, gzpa 1.4000 x 2
    ab vfl 350.4 ,7 pc 2150 and a 150 ah power ware agm ,275 amp singer alt , 2nd one coming soon
    cdt 6.5 es 6 im mids,cdt es 010 tweets,es 02 mids ,mx1000 3 way x overs , sky high and stinger hpm o gauge wires ,also 2 tantric hdd 15's in a 9.5. ^3 ported no wall box 11.5 octo port.
    NOR CAL DB DRAG JUDGE
    http://www.dcsoundlab.com

  3. #3
    chrisw91's Avatar
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    Re: to get alternator or not?

    93 dakota 6 cylinder



    1991 dodge ram 2500 standard cab
    hu- kenwood kdc-mp438u
    front- polk momo's 6x9's
    back- diamond audio tweets
    sub- 4 RE8's in sealed enclosure wired to 2 ohms
    sub amp- memphis prd.1000
    6x9's amp- rf 250a2
    everything deadened w/raamat (besides floor and roof)

    refs: civicman07(3), probmxstyle, Slammed, us3, teen,KevinWS6,1985-stang, fo0manchu
    traded: 4OZGLOVES

  4. #4
    mylows10's Avatar
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    Re: to get alternator or not?

    might be easier and cheaper to add another alt and run 2 of them.dodge alts are not cheap




    pioneer avhx 5500 dvd, gzpa 1.4000 x 2
    ab vfl 350.4 ,7 pc 2150 and a 150 ah power ware agm ,275 amp singer alt , 2nd one coming soon
    cdt 6.5 es 6 im mids,cdt es 010 tweets,es 02 mids ,mx1000 3 way x overs , sky high and stinger hpm o gauge wires ,also 2 tantric hdd 15's in a 9.5. ^3 ported no wall box 11.5 octo port.
    NOR CAL DB DRAG JUDGE
    http://www.dcsoundlab.com

  5. #5
    chrisw91's Avatar
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    Re: to get alternator or not?

    you are talking from a H/O alt perspective?



    1991 dodge ram 2500 standard cab
    hu- kenwood kdc-mp438u
    front- polk momo's 6x9's
    back- diamond audio tweets
    sub- 4 RE8's in sealed enclosure wired to 2 ohms
    sub amp- memphis prd.1000
    6x9's amp- rf 250a2
    everything deadened w/raamat (besides floor and roof)

    refs: civicman07(3), probmxstyle, Slammed, us3, teen,KevinWS6,1985-stang, fo0manchu
    traded: 4OZGLOVES

  6. #6
    goingdef's Avatar
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    Re: to get alternator or not?

    How bad are your drops? My stinger sgp12 volt meter came in today I was happy to see my memphis 16MC2000D @4ohms and Fosgate T600.2 @4ohms per ch at full tilt are only dropping my voltage down to the low 13's high 12's on hard low notes.




  7. #7
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    Re: to get alternator or not?

    its dropping to 12.4...



    1991 dodge ram 2500 standard cab
    hu- kenwood kdc-mp438u
    front- polk momo's 6x9's
    back- diamond audio tweets
    sub- 4 RE8's in sealed enclosure wired to 2 ohms
    sub amp- memphis prd.1000
    6x9's amp- rf 250a2
    everything deadened w/raamat (besides floor and roof)

    refs: civicman07(3), probmxstyle, Slammed, us3, teen,KevinWS6,1985-stang, fo0manchu
    traded: 4OZGLOVES

  8. #8
    goingdef's Avatar
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    Re: to get alternator or not?

    Quote Originally Posted by chrisw91 View Post
    its dropping to 12.4...
    well thats the alt kicking out due to hitting it's peak output, I will see that on the note around 3min in to put on and it will hold until the note passes the only way around it is a bigger alt, but if it does like mine it should fluctuate but not maintain 12.4 but for a moment.




  9. #9
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    Re: to get alternator or not?

    Quote Originally Posted by chrisw91 View Post
    you are talking from a H/O alt perspective?
    yes ,or 2 stack alts




    pioneer avhx 5500 dvd, gzpa 1.4000 x 2
    ab vfl 350.4 ,7 pc 2150 and a 150 ah power ware agm ,275 amp singer alt , 2nd one coming soon
    cdt 6.5 es 6 im mids,cdt es 010 tweets,es 02 mids ,mx1000 3 way x overs , sky high and stinger hpm o gauge wires ,also 2 tantric hdd 15's in a 9.5. ^3 ported no wall box 11.5 octo port.
    NOR CAL DB DRAG JUDGE
    http://www.dcsoundlab.com

  10. #10
    chrisw91's Avatar
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    Re: to get alternator or not?

    i kinda noticed that, there is a fine line when adjusting the sub level on the HU where the voltage will stay up, and one click up on the level it will fall on its face...



    1991 dodge ram 2500 standard cab
    hu- kenwood kdc-mp438u
    front- polk momo's 6x9's
    back- diamond audio tweets
    sub- 4 RE8's in sealed enclosure wired to 2 ohms
    sub amp- memphis prd.1000
    6x9's amp- rf 250a2
    everything deadened w/raamat (besides floor and roof)

    refs: civicman07(3), probmxstyle, Slammed, us3, teen,KevinWS6,1985-stang, fo0manchu
    traded: 4OZGLOVES

  11. #11
    goingdef's Avatar
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    Re: to get alternator or not?

    Quote Originally Posted by chrisw91 View Post
    i kinda noticed that, there is a fine line when adjusting the sub level on the HU where the voltage will stay up, and one click up on the level it will fall on its face...
    That's the alt kicking out, a H/O alt will do the same thing when push passed it's max output, so the upgrade your looking at to gain 30 amps will act the same way just one or two clicks higher till it cuts.




  12. #12
    TheUnderFighter's Avatar
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    Re: to get alternator or not?

    Hmmm... pretty good sized drop. I'm surprised... Your gains and grounds are all proper right?
    I think the extra 30a in that new alt could make a hell of a difference. Especially since your current one is 20 years old!
    Or just run both alts like a boss. Just use the 120a alt for your stereo.



    2009 Hyundai Elantra - Budget Sound in Progress
    HU- Kenwood eXcelon KDC-X994
    Fronts- Crescendo MP6 mids, Vifa Ring Radiator tweets on Arc KS300.4
    Subs- Single SA-10 on Mmats 2000.1 @ 1ohm
    Misc- 1/0 CCA from AT, Big 3 in Stinger HPM, and AT 60 mil deadener
    Bought from: Inferno333, select127, treesive, Kangaroux, DonH
    Sold to: coolest user, Psychodrama, MidgetClown, mr.tigger, av83

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    Re: to get alternator or not?

    Quote Originally Posted by TheUnderFighter View Post
    Hmmm... pretty good sized drop. I'm surprised... Your gains and grounds are all proper right?
    I think the extra 30a in that new alt could make a hell of a difference. Especially since your current one is 20 years old!
    Or just run both alts like a boss. Just use the 120a alt for your stereo.
    ^^^^^^ this




    pioneer avhx 5500 dvd, gzpa 1.4000 x 2
    ab vfl 350.4 ,7 pc 2150 and a 150 ah power ware agm ,275 amp singer alt , 2nd one coming soon
    cdt 6.5 es 6 im mids,cdt es 010 tweets,es 02 mids ,mx1000 3 way x overs , sky high and stinger hpm o gauge wires ,also 2 tantric hdd 15's in a 9.5. ^3 ported no wall box 11.5 octo port.
    NOR CAL DB DRAG JUDGE
    http://www.dcsoundlab.com

  14. #14
    chrisw91's Avatar
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    Re: to get alternator or not?

    what do people generally do. just make some home made brackets?



    1991 dodge ram 2500 standard cab
    hu- kenwood kdc-mp438u
    front- polk momo's 6x9's
    back- diamond audio tweets
    sub- 4 RE8's in sealed enclosure wired to 2 ohms
    sub amp- memphis prd.1000
    6x9's amp- rf 250a2
    everything deadened w/raamat (besides floor and roof)

    refs: civicman07(3), probmxstyle, Slammed, us3, teen,KevinWS6,1985-stang, fo0manchu
    traded: 4OZGLOVES

  15. #15
    TheUnderFighter's Avatar
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    Re: to get alternator or not?

    If you're a welder, sure. Otherwise you'll have to see if someone can build one for you. OR, just try running it with the new 120a alt.



    2009 Hyundai Elantra - Budget Sound in Progress
    HU- Kenwood eXcelon KDC-X994
    Fronts- Crescendo MP6 mids, Vifa Ring Radiator tweets on Arc KS300.4
    Subs- Single SA-10 on Mmats 2000.1 @ 1ohm
    Misc- 1/0 CCA from AT, Big 3 in Stinger HPM, and AT 60 mil deadener
    Bought from: Inferno333, select127, treesive, Kangaroux, DonH
    Sold to: coolest user, Psychodrama, MidgetClown, mr.tigger, av83

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