Maryland's Dennis Ivory added a quarter inch to the meet record in the long jump and the Terrapins, as usual, showed no quarter to the opposition today as the 24th Atlantic Coast Conference outdoor track and field championships opened at Lannigan Field.

Jim Kirby set a school record of 262 feet 6 inches in the javelin, Ian Pyka reached a personal best of 61-5 1/2 to lead a two-three shot-put performance with Tom Andersson, John Davenport placed second in the long jump and Mike Wilhelm and Dave Cornwell finished three-four in the 10,000 meters.

All that individual excellence added up to an intimidating 53-point total in only five events for Maryland, seeking its 22d straight team title. Clemson, Duke and North Carolina shared second place with 23 and none had the slightest hope of getting any closer during Saturday's 14 concluding events.

Ivory, in retaining his long-jump crown, leaped 25 feet 4 1/4 inches on his final attempt, after he had already cinched first place with a 25-3 3/4 effort. It removed from the ACC record book the 1973 record of another Maryland star, Bill Goodman.

"In order to be best, you have to break a record," Ivory said. "I had a real smooth run today. There were little things I had to put together and I really didn't think that last jump did it. But I came back and looked, and there it was."

Although Kirby fell four feet short of the meet mark, he was becoming the No. 1 javelin man in the history of a school that can recall such distinguished names as Nick Kovalakides, Jack Bacon, Dave reiss, Russ White, Dick Dull and Jim George.

It was Bacon's 261-4 standard that fell today and Kirby couldn't help applauding himself when he heard his distance.

"Jack Bacon was a hell of a throwere and I got him," Kirby said. "Can you believe it, when I threw 252 I was still fourth on the all-time list. That would have been one or two anywhere else."

Kirby, a senior from Montclair, N.J., was wearing a Washington Post sweatshirt, which he received at last summer's U.S.-RUssia track meet, but he declined to attribute his success to such an accoutrement.

"I've been concentrating more, really practicing hard," said the man with a case history of inconsistency.

Pyka, a transfer from Rhode Island, was making only his second competitive throw over 60 feet when he erupted on his first try and gave the Maryland rooting section, which included athletic director Jim Kehoe, the first of many bright moments on the first-day program. Pyka hit 60-4 1/2 to place third in the NCAA indoor meet in March.

The winner of the event for the fourth straight year was Bob Medlin of North Carolina State, who added 5 1/2 inches to his meet record with a toss of 63-10. He wasn't happy, however, he has a best of 65-4 1/2.

Gary Hofstetter of North Carolina, running the distance for the first time on a track, captured the 10,000 meters in 30:09.03. Jim Clayton of Duke retained his steeplechase title in 8:59.0.

Maryland freshmand Andre Lancaster won his 200-meter semifinal in 21.22 seconds, erasing the meet record of 21.33 set last year by the Terrapins' Nick Basciano.

Maryland scored in all 19 events last year. It won't happen this time. When Mike Adderly suffered a pulled right hamstring in the trials, the Terapons were left without a finalist in Saturdays 800 meters.