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Vanilla 1.1.5a is a product of Lussumo. More Information: Documentation, Community Support.

    • CommentAuthordavid
    • CommentTimeAug 26th 2009
    I was writing a engine builder and going to recommend Mike Neal’s MJN Fabrication Exciter Ignition coil but the web link was broken. I know he had taken some time away. Anyone know what’s up?

    I have been working on a project of my own and have been thinking about ignition advance. Has anyone used the electronic advance circuits? Do they work?

    Hello David......There is a fellow that is selling a ignition system, which seems to be working well......His name is Roy Sholl, and can be reached at 419-452-6042.....Email address is and his web site is .......Roy should be able to help you out .......Thanks.....Dale Detrich
    Another source is Bill Carpenter of CH ignitions, I have been using his design in several 4 cylinders with good results.
    He sells both with electronic ignition advance and with out it.
    If you are only looking for the coil, call him.
    Does anyone know of a Hall sensor that will work with a 2 cyl engine- wasted spark 2 terminal coil? Have been using A3240 as single cyl. one coil terminal grounded, that works OK but using it on two spark plugs and it fails! Need hall that is more electrically rugged. Craig Hinton
    • CommentAuthordavid
    • CommentTimeSep 6th 2009
    Is this the same engine we wrote about in June or was that the single cylinder you mention?
    The problem with hall sensors is they fail in microseconds if the voltage exceeds there design maximum of 40 volts. A RC snubber on the sensor with a seperate ground wire from the crankcase to the battery normally takes care of it.
    When the coil fires, both plugs fire, the current goes in the center of one plug, arc, to the head, to the other head, arc, to the other center electrode, and back to the coil. In theory the isolated DC hall circuit should not be affected. But there is always capacitance between components and unless the crank case is grounded its voltage will change every spark cycle. If One pushes the hall sensor voltage over 40 volts the sensor is history.