Voltage change Home › Forums › Club Races › Racing Calendar, Classes & Regulations › Proposed Slot.It Challenge Rules Change › Voltage change July 3, 2011 at 6:46 AM #1427 BellatorKeymaster The race voltage change (11v) has been approved by vote and I have updated the official rules document found here. Build it strong. Keep it simple. Make it work. (Leroy Grumman)