should we have maintained 190 until completing the SID?
Speed restrictions are normally specified to ensure any turn remains within a defined radius.
The only chart I can find on the web is from a simulation source:
ftp://197.155.77.5/sourceforge/p/p3/...s_new/SASA.pdf
Chart 4-20 indicates the speed restrictions for the turns. Once you are on a direct track, then normal ATC speed restrictions apply.