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Thread: Nitrous and Magnetos

  1. #1

    Nitrous and Magnetos

    I am considering a Mallory magneto for my engine but I will be using nitrous. Is it advisable to use a mag with nitrous???

  2. #2
    Senior Member RACING JUNKIE oldandtired's Avatar
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    I believe you will lose more than you gain. Your idle quality will suffer and your will only have a short range of perfect firing.
    A box that offers multiple advance reductions is much better.
    Dave

  3. #3
    Junior Member SHOW GUEST
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    A mag will work fine, If its a race car your probably going to have your timing locked out anyway so I don't see how thats going to going to affect idle quality. If your just running 1 stage just set the timing to where it needs to be when the nitrous is on and you won't need the retard stages. If you sometimes run on motor only a box might be better so you don't have to physically change the timing back and forth

  4. #4
    Senior Member RACING JUNKIE
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    I'm curious about the idle quality statement? Why would idle quality suffer?
    No matter where you go, there you are.
    **IN GOD WE TRUST**

  5. #5
    Senior Member RACING JUNKIE
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    I am courious as well, I think I kinda get what you are saying about a fixed range of timing or perfect range of timing, but??????? :?:

  6. #6
    2 pennies worth.
    Magnetos and high cylinder pressures, ie nitrous or blowers are a good marriage. If you go with the MSD you can add on all those timing widgets again.

    Dave Koehler
    http://www.koehlerinjection.com

  7. #7
    Senior Member RACING JUNKIE oldandtired's Avatar
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    I'm curious about the idle quality statement? Why would idle

    That was my experience. I tried fixed timing, but tough to crank, even backfiring. I tried using 12 degrees of mechanical advance but had to set the total advance based on the second stage maximum timing.
    When I finanly went to muli stage box, I could idle at lower RPM and reduce timing when stages kicked in.
    Disclamer: This was several years ago and technology has tried to pass me by several times. After watching the pro teams, I am guessing you can do anything with timing with enough money. Just my experience...

  8. #8
    Idle quality hasn't been a problem with the MSD mags but then I don't run a race engine idle low rpm like a oem engine.
    I suppose that until one tries the 12 or 20 amp versions it's hard to believe the differences versus the old mags or conventional cd ignition. I know I was surprised. I started with the old 1 and 2 amp mags many moons ago and then the MSD stuff until about 10 years ago. Now I use the 20 amp mag.

    There is a quantum leap between the old vertex style and the new mags.
    Starting. These days on injected engines with either style of ignition I recommend 24 volts to the starter. Makes life a whole bunch easier. Works well on giant cube engines also.

    Dave Koehler
    http://www.koehlerinjection.com

  9. #9
    Thanks for the response guys. I ended up getting an MSD 7al-3. I will eliminate the points in my current distributor and add a pro power coil to light up the engine. Nothing against mags but I can't believe how much the MSD 7al-3 does!! It will fit my application perfect.


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