Late to the party BUT has been said, your recipe needs to be reduced substantially for the same size pizza.
For a 16' 'za, look at these quantities:
INGREDIENTS
1 cup whole wheat flour
1 1/2-2 cups all purpose flour, divided
1 cup water
2 Tbsp honey
2 tsp yeast
3 Tbsp olive oil
1 1/2 tsp...