SSS: What variables of control does Nistune allow for the U12 ECU's? Does it include complete control of fuel and map tables as well as ancillaries. Not a bad option if you retain all stock sensors.
Primary and secondary fuel and ignition tables, VQ map (for MAF changes), injector sizing and injector compensation tables, injector pulsewidth limits, Coolant / Air Temp compensation tables, thermo fan switching.
That is all I can think of off the top of my head, there is more, but most of it is not required to be changed.
By all means going to something like an AEM EMS is a far more tunable option, but as far as legality and the "getting the job done" factor goes, a reprogrammed stock ecu can't be beat.