I still dont get the purpose? this cant be true that nobody has it? when even have softs of almost all jap cars now!?
Hacking the ECU is just like changing the gear/sproket ratio in ur motobike... U can either run lean, or run rich.. play a little with other stuff and increase the acceleration or the top speed... either way u loose on one thing, the stock settings are already at an ideal mix! Dont forget that running lean might posses threat to ur clutch plates, result in engine knocking... and running rich would result in missing/ too much carbon deposit on the piston...
I dont understand how thats all helpful?