The junior quarterback then backed it up with his play.
Boykin threw a school-record seven touchdown passes and the 10th-ranked Horned Frogs showcased a new fast-paced offense by scoring the most points in their history in an 82-27 rout of Texas Tech on Saturday.
It was their first win in three tries against the Red Raiders since joining the Big 12 two years ago. The 82 points are a Big 12 record for a conference game.
"No, I felt perfect," said Boykin, who had a career high in yards passing for the second straight week with 433.
"I think everybody was pretty amped up. These are one of the teams we haven't beaten in the Big 12, and it was just time to pay those guys back."
The Horned Frogs (6-1, 3-1 Big 12) topped their previous scoring high of 69 in the spread attack directed in part by co-offensive coordinator Sonny Cumbie, a former Texas Tech quarterback who spent the past four seasons as an assistant at his alma mater.
TCU let the overmatched Red Raiders stay close for most of the first half, but that was mostly a defensive problem as the teams combined for 512 yards in the first quarter.
And after Texas Tech starter Davis Webb was knocked out of the game with a left leg injury while Boykin was in the middle of throwing three touchdowns in about a 3-minute span of the third quarter, the Red Raiders (3-5, 1-4) were out of chances to keep up.
"I don't think we played well all game," said Patterson, the leader of a defense that gave up four plays of 48 yards or longer in the first quarter. "Fortunately for us, we didn't play very well and we won a ballgame. That hasn't happened around here in the last two years."
Boykin had two scoring tosses each to Josh Doctson and Deante' Gray, who had a 92-yarder about 2 minutes before Ty Slanina caught a 57-yard touchdown that gave TCU a 61-20 lead midway through the third quarter.
TCU scored the most points by an FBS school since Oklahoma State beat Savannah State 84-0 on Sept. 1, 2012, and it was the highest total for a ranked opponent against an FBS opponent since No. 6 Wisconsin beat Indiana 83-20 on Nov. 13, 2010.
Boykin was 22 of 39 for 433 yards while setting a career high in yards passing for the second week in a row, this time needing just three quarters before he was replaced by Matt Joeckel.
"If we would have played our best, it would have been tough to beat them and we didn't do that," Red Raiders coach Kliff Kingsbury said. "You beat like that, there's not a lot of words."
Johnson scored again to put the Horned Frogs over 80 with 1:16 remaining a decade after Cumbie led the Red Raiders to a 70-35 victory over the Horned Frogs, the most points allowed in Gary Patterson's 15 seasons as coach.
TCU, which beat New Mexico 69-0 in its previous highest-scoring game in 2011, had a school-record 785 yards in its first win over Tech since a 12-3 victory in 2006.
The Horned Frogs set a series scoring record against an opponent for the fourth straight week, yet another payoff for Patterson after hiring Cumbie, who was on Kingsbury's staff last year, and Doug Meacham in the offseason when he decided that he needed an offense that could keep up in the fast-paced Big 12.
"I know Sonny obviously very well," Kingsbury said. "And coach Meacham does a tremendous job with the scheme. Just overall, incredible that they've done."
Webb kept pace early by throwing for 230 of his 300 yards in the first quarter before an interception and his two fumbles led to 13 first-half points for TCU. Webb was replaced by freshman Pat Mahomes after the leg injury. Kingsbury didn't have an update on Webb after the game.
Gray led TCU with 165 yards receiving on four catches, and Doctson added 76 with a 51-yard score a week after he missed the school record by a yard on a 225-yard day that included touchdowns of 77 and 84.
Aaron Green had a career-long run of 62 yards for TCU's first touchdown and finished with 105 for his first 100-yard game.
After the last of four turnovers from the Red Raiders on an interception by Mahomes late in the third quarter, TCU's Chris Hackett and Texas Tech's D.J. Polite-Gray received offsetting personal foul penalties and were ejected for throwing punches. They will have to serve one-game suspensions.