As of now, if you reach Grim Rank, in the RP, you will have 2,000 Chakra Points and 2,000 Health Points
In the Battle Ranks thread, it even states how Grim Rank is merely for show. So I'd like to suggest that Sage Rank by Posts and Grim Rank users in the RP only have 1,800 Chakra and 1,850...