and until I just read what Hawk posted there was no actual evidence that an NA fuel pump flowed any less than a TT. Everything I read was speculation and no actual proof. With no evidence of any difference I was not inclined to change it. Granted my car sat idle for over a year with a blown turbo so I was not driving it. However, I did run it well over 2 years as a daily driver at 15lbs and no problems and not a hint of detonation. My air fuel gauges have always read full rich when boosting. Maybe I am putting too much trust in them. That being said, I have plans to upgrade to either a TT pump or Aeromotive pump and larger injectors to support the new turbos.