I have a 03 Audi A4 1.8T Quattro and have almost completed total engine rebuild for performance.Im going to be running over 20psi boost with a raceteam machinist built head and turbo.im also running 650cc injectors cat delete header stg3coils,etc.I don't think that the ecu can learn the modification even enough I'll be erasing codes daily forever let alone make the power it should with the mods the vvt alone is very important to not just power but probably even running decent and accepting the mods.has anyone else heavily modified a 1.8t and even run it a bit to clear codes so you can see if it will even run correctly?Also anyone who has used a stable cheap Vagcom reflash software please let me know your experience,opinion,brand&would you recommend it.pls hlp I don't want to finish it and it barely run plus also need airflow and vvt alone will be very important.thx for reading and have a good night