Are you talking about making up the no boil kit per instructions and then boiling it for 60 minutes? If so, you won't need to add extra sugar. In fact you will need to do the opposite. You will need to add extra water to make up for the evaporation. I would probably also add some more hops with about 15 minutes left in the boil.
Wayne
Bugeater Brewing CompanyBugeater Brewing Company