there is a link on the main site somewhere . ive sold out of my CNC machined ones . the fuelling capability exists in the software via the AMM , as it supplys the correct fuel quantity for the air quantity . now the ecu will take that information and more from other sensors , like rpm , inlet temp knock etc , set the boost level , fuelling and ignition accordingly, if anythings wrong it takes steps to prevent harm to the engine . so in theory , if the injectors/amm were big enough you could run quite high boost , in accordance with the above parameters , since the ecu can adjust it from its lookup tables . a remap , redifines those parameters to take into account the higher boost/rpm etc . Ive yet to hear anybody putting maybe 30-40% bigger injectors and a corresponding bigger AMM and see what boost they can run without fault codes and stuff like that .