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  • #1

    Boosting Alternator Voltage...

    So lately my alt has been only putting out about 13.2-13.5 volts when the car is warmed up. At night with the lights on, it sits at 13.3V. If i turn the rear defrost on the voltage drops even more to a 12.8-13V. So I was looking in to possibly getting ZZPs alternator voltage booster, or possibly doing it myself with a diode from Radio Shack. Now since we only have one wire going to the Alt, and thats a red wire it doesn't seem like ZZPs plug will work on our cars because they say they put a diode in line with the orange wire (which we dont have).

    So how could I do this myself?

    ZZP booster,

    http://shop.zzperformance.com/store/...e-Booster.aspx

    www.zzperformance.com/blog/free-mod-higher-voltage/
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  • #2
    Re: Boosting Alternator Voltage...

    Look at Caspers alt booster.
    08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
    96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine

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    • #3
      Re: Boosting Alternator Voltage...

      They show that is for a LS1 and they show two wires going to the harness and alt stock... Which has me confused. I know the LS1 and 3.8 alts both only use the one red wire. Also on the instruction page they say 1997-2002 engines except for 3800.

      http://www.casperselectronics.com/st...roducts_id=668

      Dont you have a modified ZZP voltage booster? How did they have it wired inside?

      Comment

      • #4
        Re: Boosting Alternator Voltage...

        Originally posted by philbar71 View Post
        So lately my alt has been only putting out about 13.2-13.5 volts when the car is warmed up. At night with the lights on, it sits at 13.3V. If i turn the rear defrost on the voltage drops even more to a 12.8-13V. So I was looking in to possibly getting ZZPs alternator voltage booster, or possibly doing it myself with a diode from Radio Shack. Now since we only have one wire going to the Alt, and thats a red wire it doesn't seem like ZZPs plug will work on our cars because they say they put a diode in line with the orange wire (which we dont have).

        So how could I do this myself?

        ZZP booster,

        http://shop.zzperformance.com/store/...e-Booster.aspx

        www.zzperformance.com/blog/free-mod-higher-voltage/
        1. Backside of the alternator has the plug.

        2. Why would you need more voltage? There is absolutely no need for it unless you're running stuff made for higher voltages. 12v is 12v is 12v. The accessories in your car were made to run off 12v (give or take a volt or so). Upping the voltage doesn't do anything positive, and can hurt the more sensitive electrical components in the car. Putting a diode in only polarizes the electricity and forces it down one wire with little to no resistance. You can put the diode in, but I seriously don't see the point.
        1995 Pontiac Firebird
        2008 Chevrolet Silverado LT Crew Cab 4x4

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        • #5
          Re: Boosting Alternator Voltage...

          Originally posted by philbar71 View Post
          They show that is for a LS1 and they show two wires going to the harness and alt stock... Which has me confused. I know the LS1 and 3.8 alts both only use the one red wire. Also on the instruction page they say 1997-2002 engines except for 3800.

          http://www.casperselectronics.com/st...roducts_id=668

          Dont you have a modified ZZP voltage booster? How did they have it wired inside?
          I modified the Casper voltage booster to work with my 3800 harness. Pretty easy just dremeled the notch out of the Casper harness and it plugged in and works great.
          08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
          96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine

          Comment

          • #6
            Re: Boosting Alternator Voltage...

            It's all a matter of being able to supply more current, not more volts. All the things you mention draw current/amps. You want to fix this "problem" go with a higher amp alt.
            Daily: '02 Black Yukon Denali
            Toy: '06 Torrid Red GTO
            Gone: Powerdyned '02 Pewter Camaro
            Gone: '07 Charcoal Yamaha R6
            Gone: Ex-wife, lol

            Comment

            • #7
              Re: Boosting Alternator Voltage...

              I agree with the above, it's a current issue, not a voltage issue. I was having a similar problem with my Suburban, but I had a lot of stuff drawing on the alternator (HIDs, two amps for the stereo, dual ACs, power inverter,etc.). I got a high output alternator from Power Bastards and no more issues.

              Comment

              • #8
                Re: Boosting Alternator Voltage...

                I have some 0 gauge wire on the way to upgrade the big 3. Voltage and Amperage go hand and hand. Cant really have one without the other. Plus i expect voltage drop when i upgrade the wires as well.

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                • #9
                  Re: Boosting Alternator Voltage...

                  I did the big 3 wire upgrade and it does wonders. I also have a 200 amp ALT. that charges up well.
                  08' L76 6.0L 4X4 Chevy EXT.Cab LTZ Vortec MAX with Snug top cover, Dynomax exhaust,Hptuners& K&N intake
                  96' Camaro M5 to A4 conversion, alot of mods . GT35R Turbo full suspension. Built engine

                  Comment

                  • #10
                    Re: Boosting Alternator Voltage...

                    shouldn't this be in the forced induction section

                    Comment

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