How much should a 80 pound healthy malamute be able to pull?

Hey so i have this malamute who weighs 80 pounds and is in very good shape. Simply out of curiousity im wondering how much he should be able to pull. like on snow. or carpet? people just say there bred to pull he is 4 years old and is my bestest friend and we did a local weight pool competion and are waiting for results ha ha so what should the average be? THANKS Y'ALL