im not totally sure to be totally honest as a know alot more about supra turbo's, than starlet glanza's or GT's lol. Basically, in a wastegate, you have a spring which can be set a 0.8 bar for example, and when the turbo creates that much boost, it is released by the wastegate, thus it not going over 0.8 bar.... -which means it wont hit fuel cut, if that is set to 0.9 bar.... If you understand that lol. Rob