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  1. #1
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    Default 12v to 16v alternator

    Is there anyone on here that knows how to change a 12v alternator to charge a 16v battery. It would have to be able to charge at 18.5v to get the job done. Mine is a smallish 80 amp that I would like modified.

  2. #2
    been here .......too long Smitty2's Avatar
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    .. 16v battery?

    is there such a thing for a car (truck?)


    ps... don't forget most modern BCM controlled alternators will charge at up to 16v
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  3. #3
    casual poster Willie's Avatar
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    I know you can put an external voltage regulator on.

  4. #4
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    Default

    If you are wanting the higher voltage just to run the ign, Davis Unified Ign have a bolt on 12/16V box that does the job. I believe ICE ign in Vic also has one.

  5. #5
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    Mechman do an adjustable external reg up to 19 volts.

    Zoran at Comp Engines stock Mechman stuff.

    https://www.mechman.com/accessories/voltage-control-modules/adjustable-external-regulator-w-2-pin-alt-harness/

    Delco do one as well but it's not adjustable.

  6. #6
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    Thanks everyone, I have purchased a powermaster race 16v alternator so all good. Smitty, I did a thorough dyno session with a super sedan engine a while back, baseline was with the dyno battery and alternator around 14v. Then tested with a fully charged 12v battery and no alternator, lost about 5-6 hp. Then a 3/4 charged 12v battery no alternator, lost another 5-6 hp, this test simulated what the output would be at the end of a race. Then a fully charged 16v race battery, no alternator, picked up 6 hp over the 12v with alternator combo.
    This was with MSD ignition and simulated race set up how it is raced with no alternator. I am going this way for my own drag car and 6 hp is 6 hp, I am picky with things like that.
    Anyone want to buy a near new, used once, lightweight [7 lbs] anti gravity lithium iron battery with restart option and charger cheap?

  7. #7
    Do you ever leave? immortality's Avatar
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    Quote Originally Posted by AED View Post
    Thanks everyone, I have purchased a powermaster race 16v alternator so all good. Smitty, I did a thorough dyno session with a super sedan engine a while back, baseline was with the dyno battery and alternator around 14v. Then tested with a fully charged 12v battery and no alternator, lost about 5-6 hp. Then a 3/4 charged 12v battery no alternator, lost another 5-6 hp, this test simulated what the output would be at the end of a race. Then a fully charged 16v race battery, no alternator, picked up 6 hp over the 12v with alternator combo.
    This was with MSD ignition and simulated race set up how it is raced with no alternator. I am going this way for my own drag car and 6 hp is 6 hp, I am picky with things like that.
    Anyone want to buy a near new, used once, lightweight [7 lbs] anti gravity lithium iron battery with restart option and charger cheap?
    Interesting results but not unexpected.

    Quote Originally Posted by HQ 368 View Post
    Mechman do an adjustable external reg up to 19 volts.

    Zoran at Comp Engines stock Mechman stuff.

    https://www.mechman.com/accessories/voltage-control-modules/adjustable-external-regulator-w-2-pin-alt-harness/

    Delco do one as well but it's not adjustable.
    Those mechman alternators are a nice bit of kit.

  8. #8
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    Quote Originally Posted by immortality View Post
    Those mechman alternators are a nice bit of kit.
    Absolutely killer, they make a big difference.
    Any electric fans and pumps run so much better.

    16 Volt better again

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