400 m, Men
| Competition | 1988 South American Athletics U20 Championships |
|---|---|
| Venue |
Cubatao
 BRA
|
| Held | — |
| Status | Medal |
| Competitors | 3 |
| Countries | 2 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Inaldo de Sena | BRA |
47.40 | ||
| 🥈 | Aurelio Mancheno |  ECU |
47.70 | ||
| 🥉 | Gilmar Santos | BRA |
47.99 |