The Seminoles (11-6, 2-1 Atlantic Coast Conference) started the second half on a 30-8 run to take a 66-36 lead en route to handing North Carolina its most lopsided conference loss since a 104-69 defeat to arch rival Duke in 1963.
It was the worst loss for North Carolina under coach Roy Williams.
Dulkys, whose previous career-high was 22 points, was 12 of 14 from the field and 8 of 10 from 3-point range. He added four steals and a blocked shot. His eight treys were a Florida State record in ACC play.
Harrison Barnes scored 15 points and Tyler Zeller added 14 for North Carolina (15-3, 2-1), which finished 4 of 21 from 3-point range.
Williams took his team -- except for five walk-ons that finished the game -- from the court with 14.2 seconds left in expectation of the court-storming by the Florida State fans.
The Seminoles never trailed after Dulkys' first 3-pointer seconds after the opening tip.
It was an unexpected turnabout for a Florida State team that suffered a 79-59 defeat at Clemson just a week ago and came into Saturday's game with the poorest 3-point shooting mark in the ACC at 30.2 percent.
But behind Dulkys, the Seminoles hit 12 of 27 from long distance, while the Tar Heels were simply off while playing on the road for the first time in six weeks. North Carolina made only 9 of 20 free throws and were beaten 43-35 on the boards, despite Zeller's 14 rebounds. North Carolina had not been beaten on the boards in its previous seven games.
Okaro White added 12 points and 10 rebounds for the Seminoles.
FSU led by as many as 12 points in the first half, grabbing a 31-19 lead on Dulkys' fourth 3-pointer with 7:35 remaining and then again with 6:08 left on Bernard James' riveting dunk on a putback. The 6-10 James, who had six rebounds in the early going, drew his second foul just five seconds later and sat the rest of the half.
Dulkys was 6 of 7 from the field in the first half, including 4 of 5 from 3-point distance.
North Carolina had reeled off nine straight wins during a 35-day homestand, shoring up on defense and rebounding that contributed to early-season losses to UNLV and Kentucky. But those deficiencies returned to haunt Williams' club in a big way Saturday.
Florida State, which returned nine key players from last season's team that advanced to the NCAA's regional finals, notched its first win over a ranked team this season.
'Noles blow Heels out of Tallahassee
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