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Dual Batteries?

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  • harwood39H Offline
    harwood39H Offline
    harwood39
    wrote on last edited by
    #1

    Sould i just relocate the battery to my trunk or should i run dual bats? If i were to run dual bats, houw would i set them up?

    Harwood Development - Emergency Vehicle Upfitter

    2730 5th Ave S. Unit C
    Fargo, ND 58103
    701-429-3686

    Rontan, D&R Electronics, Feniex, Federal Signal, SVP/Star, Bradford, Tufloc, Lund, Code3, Sound-Off, Nova, Copeland, Power-Arc, Recon

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    • PSiedTSiP Offline
      PSiedTSiP Offline
      PSiedTSi
      wrote on last edited by
      #2

      you have to set them up in parallel...otherwise you run 24volts

      At first I did it for fun, then I realized I made the investment and had to do it!

      92 Talon AWD 6/4bolt [EMAIL="[email protected]"][email protected][/EMAIL]
      95 240SX SE SR20DET [EMAIL="[email protected]"][email protected][/EMAIL]
      1993.5 Supra Hardtop...Sold
      Next project? 6cyl, 6spd?

      > spanish-rice;237125 wrote:
      > at first i thought the title said beer truck drivers needed... In which case i accidently put my two weeks in at work.

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      • integra_gsr98I Offline
        integra_gsr98I Offline
        integra_gsr98
        wrote on last edited by
        #3

        Why do you want two batteries?

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        • harwood39H Offline
          harwood39H Offline
          harwood39
          wrote on last edited by
          #4

          im relocating mine to the trunk and some people told me that i should just run a dual battery because than if one dies, i can turn a switch and run it off the other one.

          Harwood Development - Emergency Vehicle Upfitter

          2730 5th Ave S. Unit C
          Fargo, ND 58103
          701-429-3686

          Rontan, D&R Electronics, Feniex, Federal Signal, SVP/Star, Bradford, Tufloc, Lund, Code3, Sound-Off, Nova, Copeland, Power-Arc, Recon

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          • integra_gsr98I Offline
            integra_gsr98I Offline
            integra_gsr98
            wrote on last edited by
            #5

            Dont waste your time.

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            • P Offline
              P Offline
              pin
              wrote on last edited by
              #6

              That's a big frickin waste of money and it adds to the complexity of the wiring system, plus it adds unnecessary weight. You would also have to have the other battery hooked to the alternator, obviously, and chances are it's not going to like the added load. Were these people into massive audio systems?

              Barry
              "street races are for newbies and drifting is for the pros"

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              • harwood39H Offline
                harwood39H Offline
                harwood39
                wrote on last edited by
                #7

                ok. So i should just relocate it? and not deal with the dual bats?

                Harwood Development - Emergency Vehicle Upfitter

                2730 5th Ave S. Unit C
                Fargo, ND 58103
                701-429-3686

                Rontan, D&R Electronics, Feniex, Federal Signal, SVP/Star, Bradford, Tufloc, Lund, Code3, Sound-Off, Nova, Copeland, Power-Arc, Recon

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                • dubbsyD Offline
                  dubbsyD Offline
                  dubbsy
                  wrote on last edited by
                  #8

                  harwood39 wrote:
                  ok. So i should just relocate it? and not deal with the dual bats?
                  yes!

                  why the fuck would you take time relocating the battery to the trunk just to put another one under the hood? (or are you talking 2 in the trunk?)

                  The reason to relocate is weight distribution and space under the hood....

                  some people told me
                  kick them in the forehead... hard

                  you've also got to remember you'll need a NHRA approved cutoff switch to run on the track....

                  1995 Mustang
                  CAI, rimz, and springs.

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                  • 94NDTA9 Offline
                    94NDTA9 Offline
                    94NDTA
                    wrote on last edited by
                    #9

                    People relocate batteries for better weight transfer, but thats for rwd (or AWD I guess) cars. More weight in the back would just mean more wheel spin for you on the launch. Running dual battieries is ubber stupid unless you have a beyond massive stereo, or if you WANT to slow your car down. Don't even touch your battery.

                    legacy image

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                    • ? This user is from outside of this forum
                      ? This user is from outside of this forum
                      Guest
                      wrote on last edited by
                      #10

                      94NDTA wrote:
                      People relocate batteries for better weight transfer, but thats for rwd (or AWD I guess) cars. More weight in the back would just mean more wheel spin for you on the launch. Running dual battieries is ubber stupid unless you have a beyond massive stereo, or if you WANT to slow your car down. Don't even touch your battery.

                      People also relocate batteries if they want to attempt to equalize the weight from front to rear...very common in the auto-x world for people w/ FWD cars to relocate batteries to the rear.

                      Running 2 batteries on a massive stereo will accomplish 2 things and 2 things only. 1. It will increase the amount of time you can sit in a parking lot w/ your key off. 2. It will cause unnecessary strain on your alternator, why you ask? because a battery is an additional load for your charging system, a much more effective way to increase power on demand for a stereo is the use of 1 farad (or larger) capacitors as they are able to charge/discharge rapidly.

                      If you're going to auto-x then it might be in your interest to move the battery to the rear.

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                      • bluejaysB Offline
                        bluejaysB Offline
                        bluejays
                        wrote on last edited by
                        #11

                        why in gods name do you want to relocate it? that is just a waste of money and time at this point in your cars journey.

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                        • ? This user is from outside of this forum
                          ? This user is from outside of this forum
                          Guest
                          wrote on last edited by
                          #12

                          I'm guessing its because he has it all apart right now so it'd be easy enough to do.

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                          • harwood39H Offline
                            harwood39H Offline
                            harwood39
                            wrote on last edited by
                            #13

                            actually, my battery is shot right now, and i have a brand new battery out of my old 300zx, but it doesnt fit in my battery slot. plus i want to clean up the engine bay and i will be doing alot of auto-x this summer hopefully.

                            Harwood Development - Emergency Vehicle Upfitter

                            2730 5th Ave S. Unit C
                            Fargo, ND 58103
                            701-429-3686

                            Rontan, D&R Electronics, Feniex, Federal Signal, SVP/Star, Bradford, Tufloc, Lund, Code3, Sound-Off, Nova, Copeland, Power-Arc, Recon

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                            • B Offline
                              B Offline
                              btleier
                              wrote on last edited by
                              #14

                              I wouldn't waste your time with it.

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                              • ? This user is from outside of this forum
                                ? This user is from outside of this forum
                                Guest
                                wrote on last edited by
                                #15

                                I run dual batts, and it's no extra strain on the alternator unless the battery(s) are low, It just gives me more reserve for low rpm high amp draw intown driving.

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                                • ? This user is from outside of this forum
                                  ? This user is from outside of this forum
                                  Guest
                                  wrote on last edited by
                                  #16

                                  What wrong with multi batteries? 🙂 Get something like this

                                  Multi 3 Battery Isolator 165 amp Car Stereo Audio
                                  http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7950083821&category=33578

                                  advance auto parts and autozone in fargo stock dual ones. I think its a great idea to have dual batterys. You can turn you car off and drain off the second battery. Given we live in north dakota. A backup is nice to have! I myself run three I have alot on illegal electronic toys running. 🙂

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                                  • ? This user is from outside of this forum
                                    ? This user is from outside of this forum
                                    Guest
                                    wrote on last edited by
                                    #17

                                    Ninesecsnake wrote:
                                    I run dual batts, and it's no extra strain on the alternator unless the battery(s) are low, It just gives me more reserve for low rpm high amp draw intown driving.

                                    The laws of electronics say that you are wrong since a battery is in a constant state of depleting its reservoirs by trying to stay fully charged (batteries are energy PRODUCING devices, not energy STORAGE devices.) I'm not saying that its a HUGE strain on the charging system, but I guarantee you that that it is drawing at least a couple of amperes from your alternator. Now I agree that there are certain advantages (as discussed by me above) that may in some cases cancel out the negatives, but don't think that adding a second battery to your stereo system will help w/ dimming headlights/interior lights because they won't...at least not for long. Capacitors are the way to go there.

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                                    • Sweet-WRX-LovinS Offline
                                      Sweet-WRX-LovinS Offline
                                      Sweet-WRX-Lovin
                                      wrote on last edited by
                                      #18

                                      There's no such thing as needing reserve, other than short powerful bursts created by a big system drawing a lot of current (the why capacitors are cool), the alternator produces as much energy is needed by the system by creating resistance against the motor. It is rpm independent for the most part.

                                      One time...

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                                      • S Offline
                                        S Offline
                                        SleeperMx6
                                        wrote on last edited by
                                        #19

                                        I had to relocate my battery because it was in the way of my IC pipeing. Also cleaned up the engine bay and gave more room to other things.

                                        I say relocate it. It's not time consuming or spendy. Maybe spend $20 and an hour of your time. And it's not going to add that much more weight to the back. Just compensate and gut the trunk and back seats.

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