When I rallied my '64 'S' back in the 70's we used to 'screw' the control box to give a higher charging rate, I was running Quadoptics and 2 Super Oscars ok but you had to be careful in daily use that you didn't boil the battery. Happy memories.....

1969 4/4
1995 plus 8
2002 Aero S1
2013 M3W
2014 Plus 8