Walker shot 7 of 14 from the field and Carter was 5 of 8, and the two combined for 23 second-half points. Alec Peters added 10 points and six rebounds for Valparaiso (5-1).
The Crusaders led by eight points at the half and went on a 12-2 run after the break to go up 41-23 with 15:54 left to play. Valparaiso shot 24 of 55 from the floor and finished at 33.3 percent (7 of 21) from behind the arc after a slow 1-of-11 start on 3-pointers.
Jordan Daniels scored 18 points - including three 3-pointers - for the Bulldogs (1-4), who combined for 15 turnovers.