Navy junior Ron Harris, deciding to "put the pressure on early," upset Harvard's Cliff Sheehan in the 1,500-meter run for his second triumph of the meet today in the Outdoor Heptagonal Track and Field Championships at the Naval Academy's Ingram Field.

Princeton won the men's title in the two-day event, scoring 122 points. Navy was second with 106.5 and Army (77.5) third.

Pennsylvania, getting three individual wins from Christelle Williams of Lee High School in Springfield, Va., won the women's title with 136 points. Army (127) was second, followed by Yale (107.5).

Eight Ivy League schools and Army and Navy competed in the meet, which acquired its name from the number of teams (seven) that participated in the first meet in 1934.

Williams, named the meet's outstanding female performer, was the day's only triple individual winner. She won the 100-meter high hurdles in 14.34, the 100-meter dash in 12.32 and the 200-meter dash in 25.06.

"Yesterday I got a cramp in my right leg, so I've been trying to pull it out all day," said Williams, soaking her leg in ice. "In the hurdles I was concentrating on pulling my trail leg through as best I could because the cramp was in my lead leg. Once I started, though, I was just thinking run. I figured if the leg pops, it pops."

Harris won the 1,500 in 3:45.16 after covering the first three laps in 2:59. Sheehan, with a time of 3:52.17, finished third behind Army's Mica Comstock (3:47.01).

Harris, who ran a 3:50.46 qualifying time in the 1,500, planned on pushing Sheehan, the defending outdoor Heptagonal champion, in the final.

"I was thinking I had to take it out early and punish Cliff because he comes on so strong in the final 200 meters ," said Harris, named the outstanding male performer. "I told myself if I push it I can burn him and leave him behind."

Harris, Navy's only double winner, also won the 5,000-meter run in 14:09.47. Cornell's Grant Whitney was second in 14:10. Navy's Mike Greene, who set a meet record with a qualifying time of 46.1 Saturday in the 400-meter dash, won the final in 46.55.

Cornell sophomore Steve Kuntz cleared 6 feet 9 to win the high jump. Randy Cox of Penn, the defending champion in the 110-meter high hurdles, won again in 14.08.

In the women's shot put, Princeton's Debbie St. Phard threw a 50-3 3/4 to defeat Brown's Jennifer Loomis (46-1 1/2). Brown's Donna Neale won the 400-meter dash in 54.70.