I just got my car back yesterday after a year and it does not run well. The builders do not know how to tune fast and neither do I. I have a 214-214 atr roller Gn1's 72 injectors 70 turbo and it is back firing if you go more than half throttle. Does anyone have a sheet of what the valuations are supposed to cross reference to on Fast? Any help appreaciated. Thanks Evan Tempe Az.