Education
California State University, Long Beach.
California State University, Long Beach.
In both freestyle relay events, Ilman and his American teammates broke existing world records. Steve Clark, Mike Austin, Ilman and Don Schollander set a new world record of 3:33.2 in the 4×100. Then Clark, Roy Saari, Ilman and Schollander set a new world mark of 7:52.1 in the 4×200.
In individual competition, he finished fourth in the 400-metre freestyle event final.
In a controversial outcome, both Ilman and German swimmer Hans-Joachim Klein were officially timed at 54.0 seconds (to 1/10 of a second), and were still tied at 54.00 (to 1/100 of a second) using the new unofficial electronic timing, but the judges on their own initiative awarded the bronze medal solely to Klein on the basis of the unofficial electronic time taken to 1/1,000 of a second.
Ilman made his international swimming debut as a member of the United States. national swimming team at the 1963 Pan American Games in São Paulo Paulo, Brazil.