Its improtant to keep in mind though, that yngwie doesn't just have a delay pedal, he has a whole processing unit for it (when recording). He has a multitap delay, with the last setting i think almost 2 seconds after the first echo, also the dry/wet out settings are kind of funky.
It would probably help you to see him live, not in a video. Live he actually uses his delay to pan to different cabinets accross the stage. So he might have one set at 1000ms that comes up on the far left of the stage.
