Perfect homemade sponge cake (without baking powder)

7 eggs,
210g flour,
210g sugar.
Preparation:
Same process.
23cm pan.
Bake for 50 to 55 minutes.
Sponge cake with 8 eggs (25cm pan)
Ingredients:
8 eggs,
240g flour,
240g sugar.
Preparation:
Same process.
25cm pan.
Bake for 55 to 60 minutes.
Cool in the pan for 10 minutes, then turn out onto a wire rack.