TT used for daily drive and exciting touring, would I need to upgrade fuel pump to handle the increase fuel flow through the 555cc injectors?
No, TT pump will handle those injectors no problem. I'm running 650 injectors with E85 and still running the factory pump.
You would only upgrade a fuel pump if a) you need one compatible with alcohol based fuels or b) you’re experiencing loss of pressure. Fuel injectors alone won’t require a higher flowing fuel pump. Two things to consider 1) making more horsepower requires more fuel consumption 2) increasing boost pressure requires more fuel pressure If you know what you’re aiming for in terms of boost and hp you can use a calculator such as this one http://www.raceworks.com.au/calculators/fuel-pump-calculator/ to estimate your required fuel flow. A Z32 Twin Turbo fuel pump flows approximately 240lph.
