when do fuel lines need to be upgraded?

[Flicktitty]

Just looking to see who has larger fuel lines and at what horsepower did you upgrade?

i'm planning on going with a Single turbo on my 2JZ over winter with a larger Tq converter, and i'm assuming the cars' gonna make about 450-530RWHP depending on what fuel i'm going to be using.

i'm just wondering if this will be ok on stock fuel lines or if i should go with a larger line and if so what size -6an? -8AN?

thanks guys.

[heartofaskyline]

-6an are the same as stock lines. stock lines should support 600 at least. i have a friend that supported over 600 on his sr. he ran into fuel problems from the walbro not being able to flow enough fuel, so stock lines and a second pump should be fine for those numebr