400 m, Men
| Competition | 1983 South American Athletics U20 Championships |
|---|---|
| Venue |
Medellin
 COL
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Sérgio de Menezes |  BRA |
47.13 | ||
| 🥈 | Daniel Bambicha |  ARG |
47.29 | ||
| 🥉 | Jesús Malavé |  VEN |
48.01 |