If you are really up for it you could do what the banger boys do and run the starter (only) on 24 volt, that makes it wing a bit.
The motor will operate happily on 24 volt; they will fail sooner than if operated on 12 volts but we are talking about running over a race season without failure.
The second battery can be just a small race NiCad but you will need some fancy relay arrangement to charge it but is a fast fix.
eaa53
|