4 x 100 m Relay, Men
| Competition | 1978 South American Athletics U20 Championships |
|---|---|
| Venue |
Sao Paulo
 BRA
|
| Held | — |
| Status | Medal |
| Competitors | 12 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Chile |  CHI |
41.6 | ||
| Alfredo Sancho | — | ||||
| Juan Carlos Silva | — | ||||
| Roberto Gallaway | — | ||||
| Enrique Tapia | — | ||||
| 🥈 | Brazil | BRA |
42.0 | ||
| Mina | — | ||||
| Antônio Ferreira | — | ||||
| Nilton Dos Santos | — | ||||
| Paulo Roberto Correia | — | ||||
| 🥉 | Argentina |  ARG |
42.0 | ||
| García | — | ||||
| Nicolás Glass | — | ||||
| Adrián Ghirimoldi | — | ||||
| Carlos Gambetta | — |