The wikipedia page shows salsa notated in 4/4 time and the clave (which marks the rhythm) is written as 16th notes:
1 ee and aa 2 ee and aa 3 ee and aa 4 ee and aa
but most Salsa teachers seem to count it in 8 or two groups of 4 like this not using 16th notes at all but rather as 8th notes.
1 and 2 and 3 and 4 and 5 and 6 and 7 and 8
or
1 and 2 and 3 and 4 and 1 and 2 and 3 and 4