16 volts
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16 volts

  1. #1
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    Default 16 volts

    Would a 16 volt system benefit msd 7?

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    Senior Member Bubbletop409's Avatar
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    I would think more juice in equals more volts to the plugs. I can say for certain when I put an alternator on my first race car equipped with a 7AL2 the performance picked up and was more consistent. Prior to that the batteries alone were powering the ignition. That being said, if your ignition is currently close to 100 % efficient in combustion I doubt you would experience a noticeable difference.
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    Senior Member wagspe208's Avatar
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    Uh.... yes....
    That was the reason everyone went to 16v to begin with.
    Just an alt is good for .1et in an 8.0 boat.
    I'd go alt. Its simple.
    Wags

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    16v is nice for strating something with a mag, other than that, run an alt.

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    I do run an alt. was just wondering if swapping to 16v would be a benefit...But then my 12v fuel pump and other stuff would fry, Right?

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    Senior Member Bubbletop409's Avatar
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    The super mini alternator in my Cole put's out 15.2 from idle on. Fuel pump and electric temp gauge work fine. My engine is a pump gas deal so it spins great on 12V.
    Larry

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    LP-25.com Infomaniac's Avatar
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    Yes 16 volts gives more spark energy.

    The twin turbo promod we found out with 16 Siemens injectors it had to have 16v or it wouldnt run. Combine with a 44 amp MSD and an ECU the injectors alone were drawing 64 amps.

    I'm putting a 16 volt system on the twin turbo small block right now. It has 8 of those injectors and 8 badass ignition colis. Ywllowbullet has many recent threads on personal experiences with specific battery manufacturers. etc.
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    Senior Member wagspe208's Avatar
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    If you have alt, it is already over battery voltage. Run it.
    No reason to buy 16v batt and charger IMO.
    Wags

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    Quote Originally Posted by Infomaniac View Post
    Yes 16 volts gives more spark energy.

    The twin turbo promod we found out with 16 Siemens injectors it had to have 16v or it wouldnt run. Combine with a 44 amp MSD and an ECU the injectors alone were drawing 64 amps.

    I'm putting a 16 volt system on the twin turbo small block right now. It has 8 of those injectors and 8 badass ignition colis. Ywllowbullet has many recent threads on personal experiences with specific battery manufacturers. etc.
    Did you measure the injector amperage with the engine running? I have never seen an ECU capable of anywhere that kind of amperage. Are the injectors triggered on the + or - side? My experience is with OEM, I may be way off. I just want to learn more about the aftermarket high performance EFI/Turbo/Supercharged applications.
    Thanks,
    Dave

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    Quote Originally Posted by wagspe208 View Post
    If you have alt, it is already over battery voltage. Run it.
    No reason to buy 16v batt and charger IMO.
    Wags
    Good Advice

    Quote Originally Posted by Maxey View Post
    Did you measure the injector amperage with the engine running? I have never seen an ECU capable of anywhere that kind of amperage. Are the injectors triggered on the + or - side? My experience is with OEM, I may be way off. I just want to learn more about the aftermarket high performance EFI/Turbo/Supercharged applications.
    Thanks,
    Dave
    Dave the engine would shut down the electrical system some investigating from the injector mfg revealed how much power they required at full load.. Aftermarket injectors the ECU make a ground to trigger the injectors. Sometimes requires custom wiring to get enough voltage to some devices
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    Senior Member bp298's Avatar
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    Quote Originally Posted by Bubbletop409 View Post
    The super mini alternator in my Cole put's out 15.2 from idle on. Fuel pump and electric temp gauge work fine. My engine is a pump gas deal so it spins great on 12V.
    don't know what my super duper mini alternator puts out. all I look at is system voltage over the course of a run, in quikdata. with the battery charged, after starting, system voltage hovers around 12.6 at idle. as soon as I launch, voltage rises to 13.7-13.9, and stays around there for the entire run. on shutdown, I can clearly tell that voltage drops approximately 1 volt when rpm drops under 1500.

    but battery condition is a significant contributor to maintaining those voltages. in a drag race application, the amp output is just not enough over a very short period of time to maintain a full charge on the battery. years and years ago, I ran an entire weekend without charging the battery, 12-13 laps, thinking the alternator would take care of it and never noticing system voltage. looking at data later, you'd wonder how the thing actually ran. but it did. and that was with a gm 65amp alternator. and if the alternator fails or is disconnected, well, system voltage will go into the dirt very quickly and it's amazing the thing still runs.

    I run an optima red top and load test the thing a couple times a year, just to make sure it's still good. the biggest "draw" in my boat is the diverter motor. when it's operating, system voltage drops a little over 1 volt.

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    Senior Member wagspe208's Avatar
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    I charge in between every round. I try to tell guys to do it, but WTF do I know.
    Wags

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    Ain't Right Racin piston in the wind's Avatar
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    16 volts is no problem for electrical components. Just don't charge it with the key on. The charger can make 19.5 volts, That could take out a circuit board.
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    Senior Member bp298's Avatar
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    Quote Originally Posted by wagspe208 View Post
    I charge in between every round. I try to tell guys to do it, but WTF do I know.
    Wags
    try??? you???

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