6V to 12V conversion

[Railcarmover]

Last time I checked a higher coil discharge means a hotter spark..means a more efficient burn,means a cooler engine..that isn't a bad thing.So many modern improvements can be made to make the model A a more enjoyable and more efficient machine..without swapping out the basic components..its one of the few engines I've seen where you can basically double the horsepower in a day..