Rans Cajolo led the Baby Tamaraws' onslaught with 15 points, France Racaza added 14 while Jerold Talisayan tallied 10 points, 15 digs and six receptions.
Knotted at 12 in the third set, the Baby Tamaraws uncorked a 13-5 finishing kick, capped by Emmanuel Advincula's kill block to secure their third win as in many matches.
With the opening frame tied at 26, back-to-back drop shots by Racaza and Cajolo gave FEU-Diliman the upperhand.
Amil Pacinio paced the Blue Eaglets (0-3) with 13 markers.
Boys' volleyball action will resume on Saturday with three matches at the FEU-Diliman Gym.