Fuel rail sizes (Inside Diameters) etc.

I've done a search but could not find anything regarding which is better for our cars regrading inside diameter sizing for fuel rails.

I'm shopping for a fuel system and have noticed that Induction motorsports fuel rail has the largest I/D (20.3mm).

All other fuel rails I have looked up range from 15mm-17.5mm I/D.

So to the experts out there:

-Is a bigger I/D on fuel rails better/more ideal?
-Will larger fuel lines/fuel rails (i.e. -8 or -10) affect fuel pressure.
-Which is more important - fuel pressure or fuel volume.... or both?
-Is running 2 lines from the tank (1 line to each end of the fuel rail) better or running 1 larger line (i.e. -8 or -10) and then using Y connections to feed each end of the fuel rail?

Thanks,

Danny

I've done a search but could not find anything regarding which is better for our cars regrading inside diameter sizing for fuel rails.

I'm shopping for a fuel system and have noticed that Induction motorsports fuel rail has the largest I/D (20.3mm).

All other fuel rails I have looked up range from 15mm-17.5mm I/D.

So to the experts out there:

-Is a bigger I/D on fuel rails better/more ideal?
-Will larger fuel lines/fuel rails (i.e. -8 or -10) affect fuel pressure.
-Which is more important - fuel pressure or fuel volume.... or both?
-Is running 2 lines from the tank (1 line to each end of the fuel rail) better or running 1 larger line (i.e. -8 or -10) and then using Y connections to feed each end of the fuel rail?

Thanks,

Danny

At some point it just becomes a marketing ploy. The Titan rail has been tested on many high-hp street cars in addition to their 1600hp drag car and it isn't the largest out there...