I did it!!!
converted to dng in lightroom, but before i did it i went to preferences and disabled the creation of jpg thumbnails. I imported the sequence into davinci and it recognized as a cinema dng file 4928×3264 px.
At the DELIVER page, under Render Settings (left side of screen), you have Presets, then Output. Is the last setting on Output. You set the speed there before you hit Add Job to the Render Queue.