Does anybody know what determines BSFC that people use to calculate injector size?
The online calculators say you should use around 0.6 for BSFC of a turbocharged car. Is this related to A/F ratio?
I have it in my head that FI cars run lower A/F than NA engines.

Also, I've read/heard that injector flow rates are specified at 43psi. Is this a standard?

The learning never stops. :-o