Depends on your acceptable level of losses. Moisture is a big variable here, as this shoe struggles with higher moisture corn. At 19%, you should be able to approach 4000 bph which is probably going to put you at just over 4 mph or so. That is about all I would expect out of that machine, and even then, I would keep a very close eye on the ground for shoe losses, especially on the right side. Shoe loss will be your limiting factor.