You can burn a two page program to a 27c512 eeprom instead of the 27c256 that is the original memory, you can make the second program with the rev limiter and speed limits to whatever limits you want, to change from one program to another with just a flip of a switch, you can make the two page eeprom with a program call Appender and to set the speed and rev limits you can use Zcontrol V2.0