what option of turbos can i do to my jap TT if i wanna stay on the stock fuel system considering we have 430cc injectors? i know u guys can use SP57/8 and T04S04 quite safely but can we ?

if your going to stay on stock FS why bother even upgrading to Single... ur going to run the risk of blowing the motor without adequate
fuel,vpc,afc,map ecu, or ems .....

ur best investment is a Wideband

so if i've decided to go with a single, and get a customizable ECU, fuel system, will that be enough? if i had it tuned, will it go out of tune after awhile? can i not save the settings in the ECU?...