It's injected. So it's not the same as N/A. You need the vent the same size or the next size bigger than the outlet (as was mentioned in another post) and that is the MINIMUM it needs to be.

Also, it's alcohol. You have to remember that fuel is being returned to the tank. So because it's injected alcohol and has a return line, you need a BIG vent. Alcohol producers more vapor in the tank when return fuel is put back into the tank.