I'd say that would be detrimental not beneficial. The idea that a person needs to drink 8 glasses of water a day (2.5 pints or 1.8 litres) is an unsuported myth, and it originally meant 8 glasses of liquid, which was inclusive of all liquid contained in the food as well.
And dont believe that thirst is a poor indicator of fluid levels, we have not survived billions of years with a faulty fluid measuring system. That said, drink more than you might expect to say on the safe side I guess.