4 x 100 m Relay, Men
| Competition | 1978 South American Athletics U18 Championships |
|---|---|
| Venue |
Montevideo
 URU
|
| Held | — |
| Status | Medal |
| Competitors | 12 |
| Countries | 3 |
| Pos | Athlete(s) | Country | Mark | ||
|---|---|---|---|---|---|
| 🥇 | Argentina |  ARG |
43.27 | ||
| Alberto Alzamora | — | ||||
| Ernesto Braun | — | ||||
| Jorge Araya | — | ||||
| Hugo Alzamora | — | ||||
| 🥈 | Chile |  CHI |
43.61 | ||
| Gerardo San José | — | ||||
| Guillermo Puebla | — | ||||
| Roberto Herrera | — | ||||
| Enrique Tapia | — | ||||
| 🥉 | Brazil |  BRA |
44.17 | ||
| Roberto Lima | — | ||||
| Ricardo De Oliveira | — | ||||
| Erivaldino Souza | — | ||||
| Pedro Souza | — |